Answered

what should the voltage be?

Posted by tattoo

Aug 30, 2018 at 1:25pm

Ok on 8 100w panels 4 and 4 in series and them in parallel... What should the optimum PV voltage be at the CC in direct sun? And what should the w be?


Also what should the V +A be coming out of a 60a CC going to the batteries 12v in boost mode? The best that can be expected?


I know what the manual alludes to but what's the best that can be expected?

Posted by Admin

Aug 30, 2018 at 3:18pm

tattoo Avatar

Aug 30, 2018 at 1:25pm tattoo said:

Ok on 8 100w panels 4 and 4 in series and them in parallel... What should the optimum PV voltage be at the CC in direct sun? And what should the w be?

Also what should the V +A be coming out of a 60a CC going to the batteries 12v in boost mode? The best that can be expected?

I know what the manual alludes to but what's the best that can be expected?




Remembering that these values are rough estimates and change based on factors such as temperature, air mass, insolation, and efficiency losses the following are estimates:

Rated Watts: 800W @ 12V
Anticipated Output: 640-680W

Input Current: 10.5A-11A
Battery Charging Current: Roughly 45A-55A
Vmp at MPPT: roughly 72V
Battery Charging Current 14.4-14.8 depending on battery


Once again these are rough values, your location also influences these values.

-Renogy Team


Posted by tattoo

Aug 30, 2018 at 3:40pm

Thank you, all I was asking for is just close... So 75.6v on each side of the 4 panels in series in full sun is great, I checked them today... I couldn't remember if they should be more in parallel....

For some reason I'm not getting above 13.4 going to the batteries when I looked earlier.... I have 6 6v Deep cycle batteries to 12v and a 60a CC commander....

This is something new that just started two days ago.... It's been full sun so that's not the problem...


Any suggestions on where to look?

Posted by tattoo

Aug 30, 2018 at 3:58pm

Oh yea I checked the batteries 3 days ago with a hydrometer and they were all right at 1300.... So the batteries should be ok...

It all seemed to start when the CC went into equalize mode and it's been there for two days.... The max voltage of the day is 13.8 and it's never been that low in equalize...

Posted by Admin

Aug 30, 2018 at 3:59pm

tattoo Avatar

Aug 30, 2018 at 3:40pm tattoo said:

Thank you, all I was asking for is just close... So 75.6v on each side of the 4 panels in series in full sun is great, I checked them today... I couldn't remember if they should be more in parallel....

For some reason I'm not getting above 13.4 going to the batteries.... I have 6 6v Deep cycle batteries to 12v and a 60a CC commander....

This is something new that just started two days ago.... It's been full sun so that's not the problem...

Any suggestions on where to look?




Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries?

-Renogy Team

Posted by tattoo

Aug 30, 2018 at 4:05pm

Admin Avatar

Aug 30, 2018 at 3:59pm Admin said:

Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries?

-Renogy Team


This morning the batteries were at 12.2 that was what the days low V by the CC said... I'm checking the reading off of the CC... I can walk up and look at my CC it's inside... If that's what your asking... My Solar system has been running for 8 months in this configuration with zero problems until the past couple days...


My batteries are a total of 645 ah... 215ah ea 6v battery...

Posted by Admin

Aug 30, 2018 at 4:22pm

tattoo Avatar

Aug 30, 2018 at 4:05pm tattoo said:

Admin Avatar

Aug 30, 2018 at 3:59pm Admin said:

Are you monitoring your system through the software or going out and checking the readings? What AH Rating are your 6v batteries? Also, what was your starting voltage reading on the batteries?

-Renogy Team


This morning the batteries were at 12.2 that was what the days low V by the CC said... I'm checking the reading off of the CC... I can walk up and look at my CC it's inside... If that's what your asking... My Solar system has been running for 8 months in this configuration with zero problems until the past couple days...

My batteries are a total of 645 ah... 215ah ea 6v battery...



Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so.

Hope this helps,
-Renogy Team

Posted by tattoo

Aug 30, 2018 at 4:27pm

Admin Avatar

Aug 30, 2018 at 4:22pm Admin said:

Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so.

Hope this helps,
-Renogy Team


Like I said this is something new.... They use to FLOAT everyday until the last two days... My batteries are always at 12.7 by 10:00 am in the morning on a sunny day and 12.7 by 2:00pm on cloudy days so the batteries and the load isn't the problem...


Oh by the way the 12.2 that the CC is seeing is sag so that's not really the battery voltage...


What else could it be?? How can I check the CC to see if that's the problem?

Posted by Admin

Aug 30, 2018 at 5:12pm

tattoo Avatar

Aug 30, 2018 at 4:27pm tattoo said:

Admin Avatar

Aug 30, 2018 at 4:22pm Admin said:

Your batteries being 645Ah and at 12.2V is roughly 50-60% of the capacity. Depending on your location and prime charging sunlight, chances are that your batteries are not going to charge completely in a day. This is also contingent on whether you had a load connected to your batteries. If you do, then it might be drawing enough of a load to prevent boosting time so far. We recommend monitoring it another day, assuming your starting voltage battery is higher than 12.2 without a large enough load, and it should be boosting within another day or so.

Hope this helps,
-Renogy Team


Like I said this is something new.... They use to FLOAT everyday until the last two days... My batteries are always at 12.7 by 10:00 am in the morning on a sunny day and 12.7 by 2:00pm on cloudy days so the batteries and the load isn't the problem...

Oh by the way the 12.2 that the CC is seeing is sag so that's not really the battery voltage...

What else could it be?? How can I check the CC to see if that's the problem?



General recommendations include: checking the terminals for cleanliness on the charge controller terminals and battery terminals, making sure connections are tightly snug, using a multi-meter to determine more accurate readings, checking each battery (more than once cell) reading to make sure there are no differences in points for the hydrometer and when getting these readings making sure the batteries have not recently been watered (if flooded) and are under room temperature (possibly) conditions.

The next recommendation is that you call our technical support line, it will be a better means for troubleshooting your system. Helpful information will be the 100W panels, 60A charge controller, battery chemistry type and Ah, and also expressed history of going into float until recently.

All the best,
-Renogy Team

Posted by Guest

Aug 30, 2018 at 5:29pm

what kinda wattage or amps are the batteries getting around solar noon?

Posted by tattoo

Aug 30, 2018 at 5:36pm


Aug 30, 2018 at 5:29pm Guest said:


what kinda wattage or amps are the batteries getting around solar noon?


I'll let you know tomorrow.... I wrote it down but I'm not there at this time... Thanks

Posted by tattoo

Aug 30, 2018 at 5:41pm

Admin Avatar

Aug 30, 2018 at 5:12pm Admin said:

General recommendations include: checking the terminals for cleanliness on the charge controller terminals and battery terminals, making sure connections are tightly snug, using a multi-meter to determine more accurate readings, checking each battery (more than once cell) reading to make sure there are no differences in points for the hydrometer and when getting these readings making sure the batteries have not recently been watered (if flooded) and are under room temperature (possibly) conditions.

The next recommendation is that you call our technical support line, it will be a better means for troubleshooting your system. Helpful information will be the 100W panels, 60A charge controller, battery chemistry type and Ah, and also expressed history of going into float until recently.

All the best,
-Renogy Team


When I check the batteries with the hydrometer, I check every cell not just one per battery... But I will check them again and clean all the terminals tomorrow.


I'd rather post the info here as it's much easier to answer a question one at a time and think it through..... Rather than several questions all at once...


Plus the info will be here for others to learn from it in the future...

Posted by Guest

Aug 30, 2018 at 6:03pm

tattoo Avatar

Aug 30, 2018 at 5:36pm tattoo said:


Aug 30, 2018 at 5:29pm Guest said:



what kinda wattage or amps are the batteries getting around solar noon?


I'll let you know tomorrow.... I wrote it down but I'm not there at this time... Thanks


75v seems too high in warm/hot temps but Vmp at standard conditions has not been supplied. Typical Vmp standard conditions ~17.5v.
In very cold weather I could see 75/4 = 18.75 Vmp/panel.
if the current or wattage is sub standard in bulk mode then measuring each string's open circuit voltage and current would be a good test.
@5a/panel, each string should show 20A+ (good sun) with an open circuit voltage of 80v (typical 22v/panel decreased by heating).

What is meant by sag in respect to battery or controller voltage? Does the display not match the battery?

Posted by tattoo

Aug 30, 2018 at 6:17pm


Aug 30, 2018 at 6:03pm Guest said:






75v seems too high in warm/hot temps but Vmp at standard conditions has not been supplied. Typical Vmp standard conditions ~17.5v.
In very cold weather I could see 75/4 = 18.75 Vmp/panel.
if the current or wattage is sub standard in bulk mode then measuring each string's open circuit voltage and current would be a good test.
@5a/panel, each string should show 20A+ (good sun) with an open circuit voltage of 80v (typical 22v/panel decreased by heating).

What is meant by sag in respect to battery or controller voltage? Does the display not match the battery?


What I mean by sag is when my old fridge starts it draws down the batteries around .1 to .2 volts... Then bounces right back up to it's normal voltage at that time.....


Yea I don't know what the panels are at in the winter but they were 75.6 in direct sun today on each bank of 4.


Should I check each string of 4 by it's self tomorrow in full sun? and see what the CC says each side is doing? Just to see if each side is the same? Amps and volts?


Oh yea my panels are at the perfect angle with the sun this time of year, Not so much in the winter...

Posted by Guest

Aug 30, 2018 at 6:58pm

If you are not getting 40A or more into the batteries during bulk charge, direct sun, high noon then disconnect one sting and then the other and let the controller report voltage and power of each string, identical? Give the controller time to find the max power pt.
AFIK the lacking info is wattage or amps into the battery.




Posted by bupkis

Aug 31, 2018 at 5:00am

I'm gonna guess 90% eff (controller & wire) and 80% eff from panel heating or 70% overall. 800w x .7 = 560 watts, full sun.
560 watts into a 13.4v battery would be 560/13.4 = 41A

If you are seeing 20A, I'd suggest one string is not working!

I'd expect Vmp of each panel to be lowered by heat, maybe as low as 16v or 65v/string of 4. It is still hot locally!

During bulk the controller should display the entire arrays Vmp, absorption or float it will read higher, as high as open circuit voltage which is reduced by heat so a 22v Voc can be 19v or less when panels are hot.

Clean panels, disconnect loads, measure output in bulk charging mode full direct sun.

Posted by tattoo

Aug 31, 2018 at 5:28am


Aug 30, 2018 at 6:58pm Guest said:


If you are not getting 40A or more into the batteries during bulk charge, direct sun, high noon then disconnect one sting and then the other and let the controller report voltage and power of each string, identical? Give the controller time to find the max power pt.
AFIK the lacking info is wattage or amps into the battery.


Thank you,


I will look into that today...

Posted by tattoo

Aug 31, 2018 at 5:49am

That's a very good point... Yes it's been very hot here the last several days.... I don't think I looked at it like I have the last few days... I'm going to clean the panels and all the cables this morning and then see what the reading are later today.....

I'll get back later today and thanks for every ones help...

Posted by tattoo

Aug 31, 2018 at 8:04am

Ok Just an update.... I went and cleaned all of my battery cables and terminals.... Checked all the voltage and they were all 6.4 and all the cells were 1275 with the hydrometer.... So it ain't the batteries just like I thought but at least I know that for sure.....

Now to wait for the Sun to get directly over head in about 2.5 hours.....

I'll post more info in a little bit...

Posted by tattoo

Aug 31, 2018 at 1:19pm

Ok I got them washed and the leaves out from under the panels... None were on the top of the panels.... There were a few clouds today but they were very few....


The lower 4 panels in series in full sun... These were the highest readings I seen on my 60a CC...


PV power 338.2w

PV voltage 60.3v  Boosting

Battery voltage 13.5v

Battery current 23.0a


The upper 4 panels in series in full sun... These were the highest readings I seen on my 60a CC...

PV power 341.1w
PV voltage 63.7v Boosting
Battery voltage 13.5
Battery current 24.2a


This is all 8 panels 4 and 4 in series and in parallel in full sun... These were the highest readings I seen on my 60a CC...

PV power 614.0w
PV voltage 61.6v Boosting
Battery voltage 14.1
Battery current 43.6a


Ok what do you guys think with those numbers? It's right at 90f here....

Posted by Admin

Aug 31, 2018 at 2:36pm

tattoo Avatar

Aug 31, 2018 at 1:19pm tattoo said:

Ok I got them washed and the leaves out from under the panels... None were on the top of the panels.... There were a few clouds today but they were very few....

The lower 4 panels in series in full sun... These were the highest readings I seen on my 60a CC...

PV power 338.2w

PV voltage 60.3v  Boosting

Battery voltage 13.5v

Battery current 23.0a

The upper 4 panels in series in full sun... These were the highest readings I seen on my 60a CC...

PV power 341.1w
PV voltage 63.7v Boosting
Battery voltage 13.5
Battery current 24.2a

This is all 8 panels 4 and 4 in series and in parallel in full sun... These were the highest readings I seen on my 60a CC...

PV power 614.0w
PV voltage 61.6v Boosting
Battery voltage 14.1
Battery current 43.6a

Ok what do you guys think with those numbers? It's right at 90f here....




Wasn't your initial issue that the charge controller would not boost? Your numbers seem to be inline with what's appropriate. It might even go higher depending on your temperature, insolation, and other real world factors.

-Renogy Team

Posted by tattoo

Aug 31, 2018 at 4:54pm

Admin Avatar

Aug 31, 2018 at 2:36pm Admin said:

Wasn't your initial issue that the charge controller would not boost? Your numbers seem to be inline with what's appropriate. It might even go higher depending on your temperature, insolation, and other real world factors.

-Renogy Team


Yes basically, my initial problem was that it wouldn't get out of equalization...... It stayed there for 2 days until I killed the power..... So if it's appropriate then why didn't it go out of equalization in full sun with no load? What do you think the problem might be? Was it a glitch in the CC?


This is real world factors, it's not inside a building.....

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So my question is, Why did it just start doing this after 8 months with no problems at all?

Posted by Admin

Aug 31, 2018 at 5:27pm

tattoo Avatar

Aug 31, 2018 at 4:54pm tattoo said:

Admin Avatar

Aug 31, 2018 at 2:36pm Admin said:

Wasn't your initial issue that the charge controller would not boost? Your numbers seem to be inline with what's appropriate. It might even go higher depending on your temperature, insolation, and other real world factors.

-Renogy Team


Yes basically, my initial problem was that it wouldn't get out of equalization...... It stayed there for 2 days until I killed the power..... So if it's appropriate then why didn't it go out of equalization in full sun with no load? What do you think the problem might be? Was it a glitch in the CC?

This is real world factors, it's not inside a building.....

<iframe style="position: absolute; width: 22.680000000000064px; height: 4.360000000000014px; z-index: -9999; border-style: none;left: 15px; top: -5px;" id="MoatPxIOPT0_45593353" scrolling="no" width="22.680000000000064" height="4.360000000000014"></iframe>

<iframe style="position: absolute; width: 22.68px; height: 4.36px; z-index: -9999; border-style: none; left: 1075px; top: -5px;" id="MoatPxIOPT0_26354808" scrolling="no" width="22.680000000000064" height="4.360000000000014"></iframe>

<iframe style="position: absolute; width: 22.68px; height: 4.36px; z-index: -9999; border-style: none; left: 15px; top: 157px;" id="MoatPxIOPT0_71091764" scrolling="no" width="22.680000000000064" height="4.360000000000014"></iframe>

<iframe style="position: absolute; width: 22.68px; height: 4.36px; z-index: -9999; border-style: none; left: 1075px; top: 157px;" id="MoatPxIOPT0_53127509" scrolling="no" width="22.680000000000064" height="4.360000000000014"></iframe>


So my question is, Why did it just start doing this after 8 months with no problems at all?



What kind of batteries do you have? SLA, AGM, FLD, GEL?

-Renogy Team

Posted by tattoo

Aug 31, 2018 at 6:01pm

6 Flooded deep cycle 6v 215ah.. The batteries are only a little over a year old...



Posted by tattoo

Aug 31, 2018 at 6:07pm

I've never done what I did today before and it was a pain in the a-- but I feel I know my system much better than I did before today..... Once I figure out my problem if there is one? I think I will do this twice a year and keep records to see the performance of my system...

I will do it in the winter and in the summer...

Posted by bupkis

Sep 1, 2018 at 6:52am

I'll suggest your controller lost its mind! With a max voltage of 13.8v I believe it was stuck in Float. (13.4v temp compensated as temp climbed).
This is indicated by the high PV voltage, @ or near Voc with assumed little battery current (that value was never given).

If truly in equalize with low batt v, all available power would go to the battery (40A) to raise its voltage and PV voltage would be near 60v in the heat.

During regulation (power reduced to maintain a constant voltage charging) the PV voltage raises as current is limited because 'it' spends more time @ Voc (OFF) than Vmp (ON) and the meter averages those 2 voltages, meter can not measure the very fast fluctuation between Vmp and Voc.

It seems to be preforming normally based on your recent data.

I am somewhat amazed at your Vmp of 60v or 15v/panel, heat has reduced Vmp that much!! from 17v+ (data not given) @ standard conditons.
IIRC, I measured 145 degrees F (back of panel with IR gun), full sun, 85? F ambient. Panels get hot!

Posted by tattoo

Sep 1, 2018 at 7:40am

bupkis Avatar

Sep 1, 2018 at 6:52am bupkis said:

I'll suggest your controller lost its mind! With a max voltage of 13.8v I believe it was stuck in Float. (13.4v temp compensated as temp climbed).
This is indicated by the high PV voltage, @ or near Voc with assumed little battery current (that value was never given).

If truly in equalize with low batt v, all available power would go to the battery (40A) to raise its voltage and PV voltage would be near 60v in the heat.

During regulation (power reduced to maintain a constant voltage charging) the PV voltage raises as current is limited because 'it' spends more time @ Voc (OFF) than Vmp (ON) and the meter averages those 2 voltages, meter can not measure the very fast fluctuation between Vmp and Voc.

It seems to be preforming normally based on your recent data.

I am somewhat amazed at your Vmp of 60v or 15v/panel, heat has reduced Vmp that much!! from 17v+ (data not given) @ standard conditons.
IIRC, I measured 145 degrees F (back of panel with IR gun), full sun, 85? F ambient. Panels get hot!


Thank you, That makes a lot of sense..... I thought it was the CC to start with when it wouldn't come out of equalize mode on it's own, that's why I went through the entire system meticulously to make sure something else wasn't the problem first..... There is no other problem....


Now lets see what the guy at Renogy has to say....

Posted by tattoo

Sep 1, 2018 at 7:46am

This why I like posting on here rather than calling Renogy tech.... Plus the answers will be here just in case someone else has the same problem in the future...


Now what do you think Administrator? Is it the CC?

Posted by v10

Sep 1, 2018 at 7:55am

Tattoo, some of us appreciate that,. Its a shame the original forum isn't archived somewhere on this one.

You guys have a treasure of usable information out there but it seems to have vanished.

I hope you find what was causing your glitch

Posted by tattoo

Sep 1, 2018 at 8:13am

After thinking about it the first thing I checked was the Voc.... I did that first because I thought I might have a panel going out...

The upper bank of panels were 75.6 and the lower bank was 75.4 in full sun....

Thanks for asking that question...

Posted by bupkis

Sep 1, 2018 at 8:26am

There is likely not enough info to diagnose remotely, these things are dynamic.

One feature of your controller is it stays in equalize mode until it accumulates enough time at eq voltage to time out (2 hrs?)
I can only assume that if not held at eq voltage long enough on day 1 it starts day two trying to accumulate that time.
Why it never got there may always be a mystery, hope it doesn't happen again!

IMO, a good mppt LCD display should show PV voltage/amps in, battery voltage/amps in, charge mode all on the default screen, maybe even max/min daily batt v.

One of the features I like on the app is that I can show up at my brothers RV, display daily min/max for up to year in the past.
This does not show how long it stayed at the max but withing a few moments I can determine how low his batteries are being discharged to and if it made it to his charging voltage daily or not. This also shows the time it takes his 400ah bank to recover after not being fully recharged on any camping trip.

Posted by bupkis

Sep 1, 2018 at 8:29am

tattoo Avatar

Sep 1, 2018 at 8:13am tattoo said:

After thinking about it the first thing I checked was the Voc.... I did that first because I thought I might have a panel going out...

The upper bank of panels were 75.6 and the lower bank was 75.4 in full sun....

Thanks for asking that question...


That indicates that when your controller shows that high of a PV voltage that current is being limited to almost nil.

Posted by tattoo

Sep 1, 2018 at 8:35am

bupkis Avatar

Sep 1, 2018 at 8:29am bupkis said:

That indicates that when your controller shows that high of a PV voltage that current is being limited to almost nil.



So does that mean the CC isn't working properly?  I think I understand...

Posted by tattoo

Sep 1, 2018 at 8:44am

bupkis Avatar

Sep 1, 2018 at 8:26am bupkis said:

 One feature of your controller is it stays in equalize mode until it accumulates enough time at eq voltage to time out (2 hrs?)
I can only assume that if not held at eq voltage long enough on day 1 it starts day two trying to accumulate that time.
Why it never got there may always be a mystery, hope it doesn't happen again!


It's funny you said that.....


I've seen it take two days before but that was because it was raining but it still finished even on a cloudy day in the rain....


All of the other times when it went to equalize mode it still had my little amount of draw on the system and it finished in about 4 hours in full sun...


I have never done it before but on the 28th I decided to unhook all the load so it would finish quicker... It never came out of EQ and the most voltage I seen in the batteries was 13.6 for 2 days.....


I knew right then I had a problem...

Posted by bupkis

Sep 1, 2018 at 9:29am

It got stuck. In float? maybe! Indicating it is in eq and not eq-ing, that seems to be the problem, I'll stick with lost its mind.

Posted by tattoo

Sep 1, 2018 at 10:07am

bupkis Avatar

Sep 1, 2018 at 9:29am bupkis said:

It got stuck. In float? maybe! Indicating it is in eq and not eq-ing, that seems to be the problem, I'll stick with lost its mind.


LOL Yea that's a good analogy.....

Well lets see if Renogy agrees....

Posted by Admin

Sep 1, 2018 at 3:09pm

tattoo Avatar

Sep 1, 2018 at 7:46am tattoo said:

This why I like posting on here rather than calling Renogy tech.... Plus the answers will be here just in case someone else has the same problem in the future...

Now what do you think Administrator? Is it the CC?




While the batteries were fine according to your hydrometer, we were asking questions about it in the event that the charge controller experienced a mishap if the battery chemistry was different than rated on the charge controller side. For example, charging/equalizing an AGM battery under the Flooded setting by mistake. As mentioned earlier, temperature, insolation, and other factors have an effect on the power output of the panels. Despite ambient temperature being 90dF, you witnessed just how much hotter these components can get and as a result plays a role in charging your batteries. We have recommended the loads not be connected when the battery is equalizing, it seems the controller might have experienced some kind of glitch when you disconnected the load as it was trying to equalize. The controller is supposed to equalize under the duration of 120min but perhaps it never thought it reached the stage and got stuck. Since your system is running normally, we would recommend to keep monitoring it, and when it's time to equalize again, keep the same procedure you had initially and observe if there is any changes.

-Renogy Team

Posted by Admin

Sep 1, 2018 at 3:12pm

v10 Avatar

Sep 1, 2018 at 7:55am v10 said:

Tattoo, some of us appreciate that,. Its a shame the original forum isn't archived somewhere on this one.

You guys have a treasure of usable information out there but it seems to have vanished.

I hope you find what was causing your glitch



We are currently working on bringing the content of the old forum onto this one which is why it will be locked September 3rd. It will either be reposts of threads entirely or if we can streamline a process, we will do that. It will take some time and as a result the old forum is still and will remain live just for viewing, not posting.

-Renogy Team

Posted by tattoo

Sep 1, 2018 at 6:23pm

Admin Avatar

Sep 1, 2018 at 3:09pm Admin said:

While the batteries were fine according to your hydrometer, we were asking questions about it in the event that the charge controller experienced a mishap if the battery chemistry was different than rated on the charge controller side. For example, charging/equalizing an AGM battery under the Flooded setting by mistake. As mentioned earlier, temperature, insolation, and other factors have an effect on the power output of the panels. Despite ambient temperature being 90dF, you witnessed just how much hotter these components can get and as a result plays a role in charging your batteries. We have recommended the loads not be connected when the battery is equalizing, it seems the controller might have experienced some kind of glitch when you disconnected the load as it was trying to equalize. The controller is supposed to equalize under the duration of 120min but perhaps it never thought it reached the stage and got stuck. Since your system is running normally, we would recommend to keep monitoring it, and when it's time to equalize again, keep the same procedure you had initially and observe if there is any changes.

-Renogy Team


You might know this and you might not but I didn't want to say anything before now........ I unhooked the controller during Eq after 2 days in direct sun light with NO load...... because your tech at Renogy told me to do it when I called them on the 30th... So don't put it off on me... I know how to set up the controller just like I told your Tech that was obviously reading questions out of a book that the batteries were set on flooded correctly not something else... I even went through the monitor settings with him at that time....

 

I could go into other things he asked me but I'm not going there right now....


Now the small loads have been working just fine through Eq for roughly for 6 months with this CC and almost a year with the 40a CC that I swapped out... so that's not the problem here either.... So what your saying is you want to get people to unhook there entire house or what ever on the 28th for it to Eq? That makes no sense and I bet NO one does despite your suggestions...


I'm going to set the date on the CC to the 27th tomorrow to get it to go into Eq on Monday and see what happens...

 

Posted by Admin

Sep 1, 2018 at 7:20pm

tattoo Avatar

Sep 1, 2018 at 6:23pm tattoo said:

Admin Avatar

Sep 1, 2018 at 3:09pm Admin said:

While the batteries were fine according to your hydrometer, we were asking questions about it in the event that the charge controller experienced a mishap if the battery chemistry was different than rated on the charge controller side. For example, charging/equalizing an AGM battery under the Flooded setting by mistake. As mentioned earlier, temperature, insolation, and other factors have an effect on the power output of the panels. Despite ambient temperature being 90dF, you witnessed just how much hotter these components can get and as a result plays a role in charging your batteries. We have recommended the loads not be connected when the battery is equalizing, it seems the controller might have experienced some kind of glitch when you disconnected the load as it was trying to equalize. The controller is supposed to equalize under the duration of 120min but perhaps it never thought it reached the stage and got stuck. Since your system is running normally, we would recommend to keep monitoring it, and when it's time to equalize again, keep the same procedure you had initially and observe if there is any changes.

-Renogy Team


You might know this and you might not but I didn't want to say anything before now........ I unhooked the controller during Eq after 2 days in direct sun light with NO load...... because your tech at Renogy told me to do it when I called them on the 30th... So don't put it off on me... I know how to set up the controller just like I told your Tech that was obviously reading questions out of a book that the batteries were set on flooded correctly not something else... I even went through the monitor settings with him at that time....

 

I could go into other things he asked me but I'm not going there right now....

Now the small loads have been working just fine through Eq for roughly for 6 months with this CC and almost a year with the 40a CC that I swapped out... so that's not the problem here either.... So what your saying is you want to get people to unhook there entire house or what ever on the 28th for it to Eq? That makes no sense and I bet NO one does despite your suggestions...

I'm going to set the date on the CC to the 27th tomorrow to get it to go into Eq on Monday and see what happens...

This right here is why things should be discussed on the forum rather than calling Renogy..... There is a record of it...



The intent was not to blame, it was to draw inferences based on the information presented. The recommendation to disconnect loads when the battery is equalizing is to protect potential loads that cannot handle the higher battery surface voltage and risk damaging other electronics. We look forward to seeing your results to determine what other inferences can be drawn from your scenario.

-Renogy Team

Posted by tattoo

Sep 1, 2018 at 7:29pm

Admin Avatar

Sep 1, 2018 at 7:20pm Admin said:

The intent was not to blame, it was to draw inferences based on the information presented. The recommendation to disconnect loads when the battery is equalizing is to protect potential loads that cannot handle the higher battery surface voltage and risk damaging other electronics. We look forward to seeing your results to determine what other inferences can be drawn from your scenario.

-Renogy Team


Thank you for that, I didn't start using solar last week and I understand how they work.... I'm kind glad this happened because it's a HUGE learning curve.....


I will let you know what I find out, Hope it was a one time glitch....


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Have a great Holiday....


By the way when he asked me to unhook the cables it was only at 13.6 so that's by no means high voltage...

Posted by bupkis

Sep 2, 2018 at 6:36am

just for info, what voltage have you set for equalize?

Posted by tattoo

Sep 2, 2018 at 7:00am

bupkis Avatar

Sep 2, 2018 at 6:36am bupkis said:

just for info, what voltage have you set for equalize?


I'm not sure I can change it... But the default is 15.2 I believe for flooded, I will check and see...


I set the date to the 27th this morning so it should go to Eq tomorrow....


Today is the first day that the batteries were at 12.7 by 10:00am and the low v of the day was 12.2 with my normal load at night.... That's back to normal and the way it's always been....


So it might have been a glitch, Let's see what happens today and see if it goes to float as it hasn't done that since the 27th...


Fingers crossed....

Posted by bupkis

Sep 2, 2018 at 9:14am

change nothing if you believe your hydrometer.

manual shows 14.8v eq / 14.6v charge, not much different and not likely to mess up anything!!!

Consider the mt remote display!

Posted by tattoo

Sep 2, 2018 at 9:24am

bupkis Avatar

Sep 2, 2018 at 9:14am bupkis said:

change nothing if you believe your hydrometer.

manual shows 14.8v eq / 14.6v charge, not much different and not likely to mess up anything!!!

Consider the mt remote display!


Got ya thanks for checking.... I have a different hydrometer, I will check them again in a day or two after it Eq....


I will consider it.... Do you have a link for one that will work with my CC?

Posted by bupkis

Sep 2, 2018 at 9:52am

you hydro reading show you are keeping it well cared for.

www.renogy.com/tracer-meter-mt-50-for-commander-charge-controller-w-lcd-display/

The reason I suggest it is its default screen without punching buttons.

it may not be helpful!

Posted by tattoo

Sep 2, 2018 at 10:10am

Yea I have one of them, It was with my 40aCC.... Or still is, I still have it...

Posted by Admin

Sep 2, 2018 at 10:34am

bupkis Avatar

Sep 2, 2018 at 9:14am bupkis said:

change nothing if you believe your hydrometer.

manual shows 14.8v eq / 14.6v charge, not much different and not likely to mess up anything!!!

Consider the mt remote display!




The MT-50 is compatible with the Commander 20 and Commander 40, not the Commander 60. The Commander 60 has the PC software compatibility.

-Renogy Team

Posted by tattoo

Sep 2, 2018 at 12:59pm

Yep that's right LOL I forgot since I don't use a remote device.... But I might consider it...


 The 60a CC has all the info that I have been given on the screen itself just like the MT50 displays and even more after thinking about it...

Posted by tattoo

Sep 2, 2018 at 3:31pm

Well no float today either..... The batteries did get up to 14.9 at some point today but not long enough I guess....


I did see 41.8a coming from the panels at one point....


Well lets see what tomorrow brings with the Eq.... I'm planning on turning off all on my load as suggested tomorrow for three hours to see what happens... Just to cut out any chances of a glitch on my end...

Posted by tattoo

Sep 3, 2018 at 4:37pm

Ok While I was waiting the Sun to get over head I decided to go through the settings on my 60a CC... Man this thing does way more than I remembered...Mainly because I hadn't needed to get back into it......


Here are some of the things I found on it... I guess you can change the settings but I'm not changing anything for now...




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