Answered

Strange Voltage Drop

Posted by blade3609

Oct 29, 2018 at 10:55am

Hello,


I have a Rover 40A mppt

2x strings of "2x100 watt in series" connected in parallel.

The voltage is around 29-30V when optimally charging and 35V when not the battery is full or not optimally charging.

Charging a 12V battery 200AH

Inverter is connected, and devices are using about 40watts


Ive noticed since 2 days now that everyday at 9AM the panel voltage drops from 35V to 15volts for about 10 minutes and goes back to 29 volts, this expected behavior for the rover? I have not checked the voltage coming in with a meter yet. But since this is everyday at 9AM, it looks like the MPPT controller.



Any thoughts?

Posted by tattoo

Oct 29, 2018 at 1:11pm

What kind of device do you have attached to the inverter? Does it run all the time?

That could be normal depending the draw....

How old is your system?

Posted by blade3609

Oct 29, 2018 at 1:56pm

Its currently just a switch with cameras and an NVR.


Im drawing 24/7 40 watts, at start of day the batteries are drained to about 12.3-12.2 volts. At around 1 PM i see the system charged the battery completely and it changes to FLOAT charge


my system is 2 months old.

Posted by tattoo

Oct 29, 2018 at 2:13pm

I think your battery is getting a little old but that's normal.... Since it's first thing in the AM when the battery is only at 12.2 it's lowest and since it's floating in the afternoon.... I would keep an eye on it but I wouldn't worry over it....

Posted by blade3609

Oct 29, 2018 at 2:55pm

A little old? The battery is barely 2 months old x_x.


At exactly 9AM the panel voltage drops from 35V to 15volts for about 10 minutes and goes back to 29 volts. How does the battery influence that ? It looks maybe like a rover test ?


the battery is holding its charge quite well over night. From <5 PM - 7.30 AM , with a draw of 40 watts / 12.~ = 3+ A , lets say with losses 4+ amps


12.3 is about 65 % .. 0.65 x 200AH = 130 AH, that means about 70 AH used in 14.5 hours.

Posted by tattoo

Oct 29, 2018 at 4:09pm

blade3609 Avatar

Oct 29, 2018 at 2:55pm blade3609 said:

A little old? The battery is barely 2 months old x_x.

 


LOL I'm sorry I read it was 2 years old... LOL



Posted by tattoo

Oct 29, 2018 at 4:16pm

blade3609 Avatar

Oct 29, 2018 at 2:55pm blade3609 said:

A little old? The battery is barely 2 months old x_x.


At exactly 9AM the panel voltage drops from 35V to 15volts for about 10 minutes and goes back to 29 volts. How does the battery influence that ? It looks maybe like a rover test ?


the battery is holding its charge quite well over night. From <5 PM - 7.30 AM , with a draw of 40 watts / 12.~ = 3+ A , lets say with losses 4+ amps


12.3 is about 65 % .. 0.65 x 200AH = 130 AH, that means about 70 AH used in 14.5 hours.


Yes I agree your battery is holding voltage very well... And is sized just right for your usage... You don't want to let your battery get below 50% draw down....


You could be right about your rover test..  But I haven't run across that happening on either of my systems....

 

Posted by tattoo

Oct 29, 2018 at 4:19pm

I just thought of something.... Do you have a tree or something shading your panels at 9am? And then the Sun is above it letting full Sun again?

Posted by blade3609

Oct 29, 2018 at 6:33pm

There are no trees nearby.


I find it very odd too, I haven't noticed this drop before.


During the voltage drop the charge current is 5 -6 A, after the drop it jumps all the way to 14 A.


Do you think it could be a bad panel? or just the MPPT calibrating itself to start charging higher currents?

Posted by blade3609

Oct 29, 2018 at 6:43pm

Here is a graph i compiled of the charge current. (on the left its x10 to get Amps)

1.PNG

Posted by tattoo

Oct 29, 2018 at 7:56pm

blade3609 Avatar

Oct 29, 2018 at 6:43pm blade3609 said:

Here is a graph i compiled of the charge current. (on the left its x10 to get Amps)



What is the angle of your panels? The graph looks like what my panels do... That looks normal for this time of year, the time of day and the angle of the sun...

Posted by blade3609

Oct 29, 2018 at 8:24pm

My panels are facing north, but are pretty flat almost horizontal.



2.PNG

This is the voltage drop from today


3.PNG


This is the voltage drop from yesterday

Posted by Admin

Oct 30, 2018 at 1:57am

blade3609 Avatar

Oct 29, 2018 at 10:55am blade3609 said:

Hello,

I have a Rover 40A mppt

2x strings of "2x100 watt in series" connected in parallel.

The voltage is around 29-30V when optimally charging and 35V when not the battery is full or not optimally charging.

Charging a 12V battery 200AH

Inverter is connected, and devices are using about 40watts

Ive noticed since 2 days now that everyday at 9AM the panel voltage drops from 35V to 15volts for about 10 minutes and goes back to 29 volts, this expected behavior for the rover? I have not checked the voltage coming in with a meter yet. But since this is everyday at 9AM, it looks like the MPPT controller.


Any thoughts?



Hello,

Based on your responses, we have gathered that there are no trees nearby and that the drop seems to happen around the same time for both of your graphs. During this time, do you have a load that could be "activated" at this time period? It does seem peculiar that it happens round the exact same time. Also, what is your general location?

-Renogy Team

Posted by blade3609

Oct 30, 2018 at 4:44am

There is no extra load that is activated at that time. Just a constant 40 watt usage from the switch and NVR.

Im located in Curacao, which is in the Caribbean.

Posted by bupkis

Oct 30, 2018 at 5:22am

hi blade3609, sure looks like a controller glitch!
controller is tracking Vmp up to ~36v while the sun is rising.
Controller then decides Vmp of 15v is appropriate, why, that is the question.
Then it keeps using that low Vmp for some period of time, odd.

When reported panel V drops from ~36 to 15 I'd expect the currest to take a similar drop, it does not. Current does stay low as the sun rises then jumps when 30v Vmp is acquired.


Posted by tattoo

Oct 30, 2018 at 6:06am

blade3609 Avatar

Oct 29, 2018 at 8:24pm blade3609 said:

My panels are facing north, but are pretty flat almost horizontal.



This is the voltage drop from today




This is the voltage drop from yesterday


They are both very similar.... What about something like a power pole casting a shadow? It wouldn't take much of a shadow to cause that.... Can you go out at 9am and look at your panels to see for sure?


Everything looks just fine except for that....

Posted by blade3609

Oct 30, 2018 at 8:32am

I also think its a glitch.. No weird voltage drops at 9AM today.

Posted by blade3609

Oct 30, 2018 at 9:50am

That was the plan to check outside at 9AM, but today no issues. I think its a glitch.

Posted by v10

Oct 30, 2018 at 12:56pm

Make sure your battery type selection didn't get inadvertently changed.

Mine was showing some different numbers. Upon investigation, I discovered that I had accidentally changed the battery type

Posted by tattoo

Oct 30, 2018 at 4:38pm

blade3609 Avatar

Oct 30, 2018 at 9:50am blade3609 said:

That was the plan to check outside at 9AM, but today no issues. I think its a glitch.


It could have been a glitch but I'm leaning more towards a shadow.... The sun is moving positions pretty quick across the sky this time of year....


A couple of months ago I thought I had a glitch in my CC..... But I have become to believe it was more of a time of year problem..... I will know more when it comes around next year....

Posted by blade3609

Oct 30, 2018 at 11:47pm

I think its the charge controller as it shows voltage drop at a later time today.


4.PNG

voltage drop


5.PNG

charge Amps

Posted by tattoo

Oct 31, 2018 at 5:04am

blade3609 Avatar

Oct 30, 2018 at 11:47pm blade3609 said:

I think its the charge controller as it shows voltage drop at a later time today.



voltage drop



charge Amps


It could be the CC but I'm not convinced..... I still think it's normal because of your draw... Can you unhook your draw for a day and see if you still have the voltage drop?

Posted by playersz28

Oct 31, 2018 at 5:32am

What are you using to get the data for the charts?

Posted by blade3609

Oct 31, 2018 at 9:00am

Im using a raspberry pi to get the data of serial.

Posted by blade3609

Oct 31, 2018 at 9:19am

tattoo Avatar

Oct 30, 2018 at 4:38pm tattoo said:

blade3609 Avatar

Oct 30, 2018 at 9:50am blade3609 said:

That was the plan to check outside at 9AM, but today no issues. I think its a glitch.


It could have been a glitch but I'm leaning more towards a shadow.... The sun is moving positions pretty quick across the sky this time of year....


A couple of months ago I thought I had a glitch in my CC..... But I have become to believe it was more of a time of year problem..... I will know more when it comes around next year....


What was the glitch ?

Posted by tattoo

Oct 31, 2018 at 9:28am

blade3609 Avatar

Oct 31, 2018 at 9:19am blade3609 said:

What was the glitch ?


His voltage drop I guess..... It looks normal to me..... Panels don't just keep going up..... Mine are up and down all the time..... Heck it could have been something as simple as clouds....

Posted by playersz28

Oct 31, 2018 at 9:29am

blade3609 Avatar

Oct 31, 2018 at 9:00am blade3609 said:

Im using a raspberry pi to get the data of serial.


Is that the code that lindsay posted up or your own?

I have a Pi in my RV now that I use for system monitoring but it's not connected to the serial data port on the Rover. I'd like to be able to have my own data collection as well as the BT module connected so I'll look at a serial monitor (only want to read data flow). I also have two Arduino's in the trailer for other functions.

Posted by blade3609

Oct 31, 2018 at 9:31am

tattoo Avatar

Oct 31, 2018 at 9:28am tattoo said:

blade3609 Avatar

Oct 31, 2018 at 9:19am blade3609 said:

What was the glitch ?


His voltage drop I guess..... It looks normal to me..... Panels don't just keep going up..... Mine are up and down all the time..... Heck it could have been something as simple as clouds....


I think you could be right. The CC does its thing to optimally charge the battery as it sees fit.

Posted by blade3609

Oct 31, 2018 at 9:56am

What setup do you have tattoo?

Posted by tattoo

Oct 31, 2018 at 12:56pm

blade3609 Avatar

Oct 31, 2018 at 9:56am blade3609 said:

What setup do you have tattoo?


I have 8 100w panels, a 60A Commander CC. 6 6v 215ah deep cycle batteries and a 500w and a 2000w inverters..... I'm 100% off grid.... Everything that I have came from Renogy except the batteries and they came from Batteries plus......


This will be my 3rd winter on Solar.... I use about 550w of power each day... Sometimes more but never less.....


Posted by blade3609

Oct 31, 2018 at 1:49pm

tattoo Avatar

Oct 31, 2018 at 12:56pm tattoo said:

blade3609 Avatar

Oct 31, 2018 at 9:56am blade3609 said:

What setup do you have tattoo?


I have 8 100w panels, a 60A Commander CC. 6 6v 215ah deep cycle batteries and a 500w and a 2000w inverters..... I'm 100% off grid.... Everything that I have came from Renogy except the batteries and they came from Batteries plus......


This will be my 3rd winter on Solar.... I use about 550w of power each day... Sometimes more but never less.....


Wow that's awesome! I also want to expand and get more panels eventually. I recently ordered another battery so that i can go 24v (I would need a new inverter also x_x).

Posted by blade3609

Oct 31, 2018 at 1:52pm

tattoo Avatar

Oct 31, 2018 at 12:56pm tattoo said:

blade3609 Avatar

Oct 31, 2018 at 9:56am blade3609 said:

What setup do you have tattoo?


I have 8 100w panels, a 60A Commander CC. 6 6v 215ah deep cycle batteries and a 500w and a 2000w inverters..... I'm 100% off grid.... Everything that I have came from Renogy except the batteries and they came from Batteries plus......


This will be my 3rd winter on Solar.... I use about 550w of power each day... Sometimes more but never less.....


What fuses do you have?

Posted by tattoo

Oct 31, 2018 at 2:20pm

blade3609 Avatar

Oct 31, 2018 at 1:52pm blade3609 said:

What fuses do you have?


60w that I bought at the local high end car Stereo business.... They are the very same that Renogy sells.... About the same price but no shipping....

Posted by tattoo

Oct 31, 2018 at 2:22pm

blade3609 Avatar

Oct 31, 2018 at 1:49pm blade3609 said:

Wow that's awesome! I also want to expand and get more panels eventually. I recently ordered another battery so that i can go 24v (I would need a new inverter also x_x).


Yea that's the only bad thing about going to 24v.... I'm very happy with what I can run off of my system the way it is so I don't see the need to expand any further....

Posted by blade3609

Oct 31, 2018 at 3:37pm

tattoo Avatar

Oct 31, 2018 at 2:20pm tattoo said:

blade3609 Avatar

Oct 31, 2018 at 1:52pm blade3609 said:

What fuses do you have?


60w that I bought at the local high end car Stereo business.... They are the very same that Renogy sells.... About the same price but no shipping....


How do you have the panels connected? series? parallel ? and only one fuse or multiple fuses? do you use a combiner box?

Posted by blade3609

Oct 31, 2018 at 3:44pm

You use 550W of power each day ? thats very limited power usage, what do you use it for? Im using 40 watts/hour now and that's just a camera system, 40watts x lets say during the day 12 hours, that's already 480 watts in one day.

Posted by tattoo

Oct 31, 2018 at 4:10pm

blade3609 Avatar

Oct 31, 2018 at 3:37pm blade3609 said:

How do you have the panels connected? series? parallel ? and only one fuse or multiple fuses? do you use a combiner box?


Series and parallel.... 4 each then 2.... Multiple fuses.... No combiner box they are to expensive for me, It's a cabin so I have an old fashioned house breaker box.. It's wired just as you would a house on the grid but it ain't..... Light switches, lights, fans etc.... It's 100% 120v AC I don't care for 12v DC just way to many problems from what I have seen....

Posted by tattoo

Oct 31, 2018 at 4:26pm

blade3609 Avatar

Oct 31, 2018 at 3:44pm blade3609 said:

You use 550W of power each day ? thats very limited power usage, what do you use it for? Im using 40 watts/hour now and that's just a camera system, 40watts x lets say during the day 12 hours, that's already 480 watts in one day.


Yea that's all I use everyday 24/7 it's handy knowing not to not use more than that on cloudy days..... I have an old 1940s GE fridge that uses very little power, lights, fans when I need them.... You know the regular things people use today everyday...


But it can be as much as 1kwh in a day if it's sunny and I want to use the table saw, any larger power tools etc.... I have made as much as 1.9kwh on a sunny day.... That's why I use it all I can during the day without pulling the batteries down......


Solar is really awesome if you learn what you can and what you can't do with it.... It took a lot of trial and error before I figured it out...

Posted by playersz28

Nov 1, 2018 at 6:23am

playersz28 Avatar

Oct 31, 2018 at 9:29am playersz28 said:

blade3609 Avatar

Oct 31, 2018 at 9:00am blade3609 said:

Im using a raspberry pi to get the data of serial.


Is that the code that lindsay posted up or your own?

I have a Pi in my RV now that I use for system monitoring but it's not connected to the serial data port on the Rover. I'd like to be able to have my own data collection as well as the BT module connected so I'll look at a serial monitor (only want to read data flow). I also have two Arduino's in the trailer for other functions.


Just wondering :)

Posted by blade3609

Nov 1, 2018 at 9:04am

playersz28 Avatar

Nov 1, 2018 at 6:23am playersz28 said:

playersz28 Avatar

Oct 31, 2018 at 9:29am playersz28 said:

Is that the code that lindsay posted up or your own?

I have a Pi in my RV now that I use for system monitoring but it's not connected to the serial data port on the Rover. I'd like to be able to have my own data collection as well as the BT module connected so I'll look at a serial monitor (only want to read data flow). I also have two Arduino's in the trailer for other functions.


Just wondering :)


I used this one

www.npmjs.com/package/renogy-rover


But i had to edit the code to send the data to a database and have it graphed.

The BT module does not work for my Rover, its an older version.

Posted by playersz28

Nov 1, 2018 at 10:04am

blade3609 Avatar

Nov 1, 2018 at 9:04am blade3609 said:

playersz28 Avatar

Nov 1, 2018 at 6:23am playersz28 said:

Just wondering :)


I used this one

www.npmjs.com/package/renogy-rover


But i had to edit the code to send the data to a database and have it graphed.

The BT module does not work for my Rover, its an older version.


Are there any doc's anywhere for the pkg? Is it using a USB port for the serial or is it via a GPIO port.

There's a thread on this board about a Renogy monitor done in Python by a user named "lindsay"

Posted by playersz28

Nov 1, 2018 at 10:47am

Did some more digging around and found this one github.com/danieloneill/EpsolarServer
Not sure if this one works with the newer protocol in the Rovers. My old Tracer didn't provide much info and left it up to the connected interface to keep all the info.

I have a C#/Windows 10 UWP app I wrote with a touch screen interface that display gauges and charts for data it receives as multicast packets from an ESP8266. Think I'll try setting it up with one of these Linux packages and work out the data protocols and then migrate that information into my C# app. I have my winter travel time to get it done :)

Posted by tattoo

Nov 1, 2018 at 12:49pm

playersz28 Avatar

Nov 1, 2018 at 10:47am playersz28 said:

Did some more digging around and found this one github.com/danieloneill/EpsolarServer
Not sure if this one works with the newer protocol in the Rovers. My old Tracer didn't provide much info and left it up to the connected interface to keep all the info.


Yes my old Tracer was the same way... But when I upgraded from my 40a CC to my 60a commander CC, I couldn't believe how much more you can do with it....... You can ever go back inside and look at what it was doing at 3pm or any other time on any day....


I was impressed with all it can do... Way more info that I will ever need....

Posted by blade3609

Nov 2, 2018 at 9:22am

I was thinking about the commander too , but its way more expensive then the rover.

How do you have your batteries connected?
I read somewhere that all the connections should be placed on one battery(1st battery) (example charge controller cables, inverter cables) and not on the second battery you paralleled onto the 1st or does it not matter?

Posted by playersz28

Nov 2, 2018 at 9:38am

If you have more than 1 12v or 2 6v then the main feeds off the batteries should be setup so that the connection length off the batteries is the same.

ie: for 2 12v connect the positives together and then the negatives to make a battery unit. Then take the positive feed off one and the negative off the other


Posted by bupkis

Nov 2, 2018 at 9:57am

what player describes is balanced

'if you only have 2 batteries, then simply linking them together and taking the main feeds from diagonally opposite corners cannot be improved upon.'

' we keep getting asked where the chargers should be connected to. We didn't address this question because it seemed so blatantly obvious where they should be connected that it never occurred to us that anyone might be unsure. The chargers should always be connected to the same points as the loads. Without exception. '

www.smartgauge.co.uk/batt_con.html

Posted by blade3609

Nov 2, 2018 at 10:04am

This vid I watched on youtube contradicts what you just said. www.youtube.com/watch?v=cgEvCLJuBkg

Thats why i want to be sure?

Posted by tattoo

Nov 2, 2018 at 10:05am

blade3609 Avatar

Nov 2, 2018 at 9:22am blade3609 said:

I was thinking about the commander too , but its way more expensive then the rover.

How do you have your batteries connected?
I read somewhere that all the connections should be placed on one battery(1st battery) (example charge controller cables, inverter cables) and not on the second battery you paralleled onto the 1st or does it not matter?


They are connected to the ends of the run of the batteries.... The Neg of the first battery and the Pos of the last battery....


That's what I've read and seen and it makes sense as if you hook everything to the last or the first battery, The draw down and the charging would start there.... 

Posted by tattoo

Nov 2, 2018 at 10:09am

blade3609 Avatar

Nov 2, 2018 at 10:04am blade3609 said:

This vid I watched on youtube contradicts what you just said. www.youtube.com/watch?v=cgEvCLJuBkg

Thats why i want to be sure?


LOL Your kidding right?


I wouldn't believe anything that anyone said that twisted wires on the ends of 6 wire lugs the way he did and then said you need to cover them up so they wouldn't get wet? LOL That's the dumbest thing I've seen in a while....

Posted by blade3609

Nov 2, 2018 at 10:28am

tattoo Avatar

Nov 2, 2018 at 10:09am tattoo said:

blade3609 Avatar

Nov 2, 2018 at 10:04am blade3609 said:

This vid I watched on youtube contradicts what you just said. www.youtube.com/watch?v=cgEvCLJuBkg

Thats why i want to be sure?


LOL Your kidding right?


I wouldn't believe anything that anyone said that twisted wires on the ends of 6 wire lugs the way he did and then said you need to cover them up so they wouldn't get wet? LOL That's the dumbest thing I've seen in a while....


LOL... haha


I guess you are right.


So like this? for parallel, the charge controller positive is connected to the first battery and the negative is connected to the last battery ?

And the same of the inverter?




Posted by tattoo

Nov 2, 2018 at 10:42am

blade3609 Avatar

Nov 2, 2018 at 10:28am blade3609 said:

LOL... haha


I guess you are right.


So like this? for parallel, the charge controller positive is connected to the first battery and the negative is connected to the last battery ?

And the same of the inverter?



Yep hook them to the same terminals... CC and the inverter...... Pos and Neg....


Also twice a year unhook all of your wires and clean the terminals on your batteries... Flooded or sealed a clean terminal will conduct current much better than a corroded one....


How long do you think that guys twisted wires would work before they stopped working?? Not very long I'm sure.....

Posted by blade3609

Nov 2, 2018 at 11:04am

LOL, i hope for his sake, very long x_x...How long are your inverter cables and what gauge?

I need longer cables when i hook up the second battery, i was thinking 3ft, 4 AWG.
Because now i got 4 AWG (1ft - fuse - 1ft) positive , and 2ft negative, to maintain the exact length for the pos and neg.
For the added battery, i was thinking 4 AWG (1ft - fuse - 2ft) positive and 3ft for negative. What do you think ? if 4AWG think enough?

Posted by blade3609

Nov 2, 2018 at 11:28am

Also what do you recommend for the battery interconnect cables? i was thinking 2/0 2ft as these are big batteries and they will be placed next to each other. Is the length too long?

Posted by tattoo

Nov 2, 2018 at 11:45am

blade3609 Avatar

Nov 2, 2018 at 11:04am blade3609 said:

 How long are your inverter cables and what gauge?

I need longer cables when i hook up the second battery, i was thinking 3ft, 4 AWG.
Because now i got 4 AWG (1ft - fuse - 1ft) positive , and 2ft negative, to maintain the exact length for the pos and neg.
For the added battery, i was thinking 4 AWG (1ft - fuse - 2ft) positive and 3ft for negative. What do you think ? if 4AWG think enough?


The cables to my inverter are about 4ft long.... My entire system is very close to each other.... Well other than my panels and they are about 15ft away from the CC.....

I don't remember the exact size of my cables are but I think they are 4AWG..... All my battery related cables are the same gauge...


You don't need those fuses between the batteries.....

Posted by tattoo

Nov 2, 2018 at 11:50am

blade3609 Avatar

Nov 2, 2018 at 11:28am blade3609 said:

Also what do you recommend for the battery interconnect cables? i was thinking 2/0 2ft as these are big batteries and they will be placed next to each other. Is the length too long?


That length is just fine I wouldn't make them any longer than is needed......But you will need to have a small arch in the cable just in case you need to get between them for some reason.... 4AWG will work just fine for that short of a distance.... Bigger is always better but 4AWG is easier to work with...

Posted by playersz28

Nov 2, 2018 at 12:51pm

Here's a pic for 2 12's.

I used 1/0 welding cable for all my battery interconnects and to the first fuse for pos & bus bar for neg.

If you use a fine cable like that don't solder the lug on or you'll end up with a thick copper bar :)

Attachments:

2 Battery-12V Bank - Copy.jpg

Posted by bupkis

Nov 2, 2018 at 1:28pm

results of unbalanced battery hookup
www.youtube.com/watch?v=jBNoIOOl37I&t=28s

Posted by tattoo

Nov 2, 2018 at 2:11pm

playersz28 Avatar

Nov 2, 2018 at 12:51pm playersz28 said:

Here's a pic for 2 12's.

I used 1/0 welding cable for all my battery interconnects and to the first fuse for pos & bus bar for neg.

If you use a fine cable like that don't solder the lug on or you'll end up with a thick copper bar :)


Yes sir that looks like what I had described above the way to set up your batteries.... And like I said the bigger the wire the better...

Posted by blade3609

Nov 2, 2018 at 2:16pm

bupkis Avatar

Nov 2, 2018 at 1:28pm bupkis said:

results of unbalanced battery hookup
www.youtube.com/watch?v=jBNoIOOl37I&t=28s


Wow , point made perfectly. I now know how to connect them.

Posted by tattoo

Nov 2, 2018 at 2:20pm

blade3609 Avatar

Nov 2, 2018 at 2:16pm blade3609 said:

Wow , point made perfectly. I now know how to connect them.


Yes sir just like the pic Z28 posted above.....

Posted by blade3609

Nov 2, 2018 at 2:29pm

playersz28 Avatar

Nov 2, 2018 at 12:51pm playersz28 said:

Here's a pic for 2 12's.

I used 1/0 welding cable for all my battery interconnects and to the first fuse for pos & bus bar for neg.

If you use a fine cable like that don't solder the lug on or you'll end up with a thick copper bar :)


What lengths do you have?

Posted by blade3609

Nov 2, 2018 at 2:47pm

What do you guys think ? is it ok to use 3/8 cable lugs on 5/16 bolt?

Posted by tattoo

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