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Just an update: Washers count! There was one washer in his system that he installed after the original assemble. That washer was a 3/4" washer. His goal was to level out the bus bar as he was unhappy with it not being quite level with the one it was attached to. He replaced that washer with...

Thanks! Yes, 1800Ah of battery, typed question fast. Technically there are 3 batteries capable of delivering 120 amps each. We have 4/0 wire, good lugs, etc. --- but the washer thing ... will have to go double check that one.

Hi, I have helped a friend build a really big battery setup for his RV. Here is the basics: * 1800 Amps of 12 battery * Victron Shunt * Victron victron multiplus split phase The question: when charging on city power, the inverter pushes almost 120 amps. The bus bar that is connected to the...

Thank you! I was hoping that was the case.

I have purchased a system that consists of 3 EG4 batteries, 1 - 6500EX and a server rack. I have 9 solar panels that will be connected to the 6500EX. But I also have 6 panels that are connected to a Victron 150/100. My question is: The Victron will be charging the EG4 batteries at the same...

The biggest problem I see is that the motor appears to pull about 437 amps at full load startup. In fact, if you look at the link, it appears to state 450a (assuming 450 amps). That motors running amps looks to be around 179. So the key things I would think to consider is making sure your...

Maybe this will help: As others have tried to point out, you are using 8 amps at 120 volts. That is 960 watts (8*120). If your inverter is running at 12 v, then you can divide that 960 watts by 12 to get the amp draw on your system. That is a 80 amp draw... ...and is why you are killing...

I've graduated from buying pre-built batteries, such as the Ampertime Battery, to building my own. Love it - should have done it from the very start. But now I am realizing that the Overkill BMS literally tells me everything. I am going to get rid of the lead acid battery in my RV and build...

Panels dont really care about their degree of rotation to the best of my knowledge and experience. It's mostly about angle to the sun.

It's all about that inrush current. I have not been able to run my HVAC either with that inverter and I am running 4/0 cable. I will be replacing the inverter...

I have heard this particular inverter works well with compressors. It's a low frequency inverter: https://www.electriccarpartscompany.com/3kw-apc-inverter

@gnoeld: I am running that particular inverter - it is a high frequency inverter, not a low frequency inverter. It only holds surge loads for 20 milliseconds. So you need to find a unit that can sustain around 9000 watts for 20 seconds or more.

I have run into this problem myself. The issue is that the spec on your HVAC does not include inrush. Most HVAC compressors have a minimum of 6 times the run current value. Some go as far as 10 times. Your inverter is not 6 times more powerful than your HVAC. FYI .. this is why low...

Circuit breakers are designed to pop slow. The industry standard is for 2 seconds at 6 times the rated load. So your 25 amp breaker would take 2 seconds to pop at 150 amps. It will take longer to pop at say 80. This standard was created because of devices such as compressors.

Do you have any idea how much inrush current your heat pump is pulling. Some compressors can pull up to 4 times their stated runtime current. For example, a HVAC system that runs at 20 amps might pull 80 at startup. I'm not familiar with the specifics of your inverter, but 50 amps of...

@lfightfire My panels are 150 feet from my charge controller. I am running a Victron 150/100 with 6 gauge wire. The panels are 240 watt, with a VOC of 37.2. They are configured 3s3p. I have no troubles getting 100 amps out of the charge controller at that distance, and my guess is you will...

How far away are the panels from your cabin?

Electrically (Technically) you can put a smaller main breaker down stream of a bigger one and it will work fine. As Ampster said, if you hire an inspector - they may have some strange rules in your area that says you cant. But there is no danger to putting a smaller breaker down stream. You...

If I am understanding your question, you want to put a 175 Amp circuit breaker down stream of your 200 Amp one?

Lt. Dan - the IEEE standard for panels data sheets is to report VOC at 25C (77 Fahrenheit). At 0C, I would not gamble with the theoretical voltage drop on the wire. This is because wire also changes conductive values with temperature. In your case (According to the data sheet), your panels...

I just assembled my first battery and none of my cells (purchased from same) looked like that. They all sit next to each other perfectly square. I'm interested to see how many other opinions come in on this thread as I want to build a few more batteries. The swelling would concern me too.

I agree with both Bobert, you are so close to the peak voltage that it's not worth risking killing the SCC. I would jump to the larger unit.

:) Still need to mount my temperature sensor.

After watching a ton of Will's videos and reading a ton, I decided I could do it. The Overkill sure has a ton of settings. I'm still researching what is the best settings for 230Ah EVE cells. (Of course if someone has already has the optimal data and wanted to share, it would be interesting...

Dunno about rates at every welding shop, but my local shop was within 50 cents of online. With the bonus of being able to look and touch it. The "touch" factor was worth it given I could buy exactly the length I wanted and didn't get locked into 10, 25 or 50 foot online lengths.

Here's a trick I learned about buying wire/cable. Find a local welding supply shop in your area. They will nearly always carry welding cable. That cable is multi-strand and easy to bend. Also, it allows you to "look" at it before you buy it. A bonus: welding shops sell it by the foot. So...

I needed some high amperage, so the relay I am using is good up to 40 at 120V. Here is the one I am using: https://www.amazon.com/MAGNECRAFT-W199X-12-POWER-RELAY-12VDC/dp/B005T74EZQ There are similar relays out there that are cheaper...

@Eclipse I am doing the very thing you want to do. I use a Victron solar charger and it has a cool programmable relay. I programmed the relay to turn on when there is sun and off when there is no sun. This relay triggers a bigger relay that moves my HVAC system from solar during the day, to...

I've seen scary stories with cells catching on fire, but my understanding that is when you buy cheap/used cells. My battery location is safe from accidental shorting, stuff falling on them etc.

I am excited to be building my first battery using new EVE cells from Amy (Docan) as recommended by Will. Over the next few months (as the pay checks roll in) I plan on making a couple of more batteries. Question is: How important is a battery box if I'm using all new stuff? I want to keep...

I would watch Will's videos on making your own battery bank in stead of buying pre-built batteries. It's the way I plan to go moving forward.

I love this forum, and I was glad I could contribute a little to get you setup.

I see you are running the Bluetooth versions of charge controllers. You can pair Victron Blue Tooth devices together with the steps below: Open VictronConnect, connect the device, and then navigate to Settings and select VE.Smart Networking. Click Create Network, enter a name. Click Save and...

I believe rmaddy had it right, it will be cheaper to just run 2AWG wire...

I have two AmpereTime batteries that are rated at 200AH wired in parallel in my system. I want to make my own battery, but the cells will give me either 230AH or 280AH. What happens if you add a 280AH battery in parallel into a system that already has two 200AH batteries. Will it basically...