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My camper is set up by the factory for 50 amp service. The Factory used 6/3 AWG with (about) a 12 AWG bare copper ground wire between the shore power connector and the A/C distribution panel. I am installing a new Victron MultiPlus II 12/3000/120-50 2x120V inverter. Question: Did I make a...

Thank you for your input. I just wanted to be sure what I was doing was necessary, before I ordered parts for the other 3 batteries. I am going with a terminal post fuse from West Marine. I've finished the first battery shown here. I've been capacity testing each cell before re-assembling the...

I have built four 12VDC batteries built from 130 Ah CALB Lithium Iron Phosphate cells. Each battery has an Overkill Solar BMS. I will place the batteries in parallel to build a battery bank supplying power to my inverter. Question: Is it necessary to add a fuse to each battery to protect the...

In 2012 I bought 45 CALM 130Ah Lithium Iron Phosphate cells for a DIY EV. After 16,000 miles, the EV is long gone but the cells remain. I’ve been using them as 12 V batteries in my camper and they work well. But sometimes they get out of balance, one cell goes high and shuts off the charging...

Thank you! Funny, I found that same solution on Amazon and ordered one yesterday. I have four batteries to update in this project, but I'm buying the various bits for only 1 battery. I'm a slow learner sometimes... in the past I'd just order all 4 and take a chance. :-) Soon as I know I have a...

What fuse did you use? I've ordered a set of terminal posts, similar to what you appear to be using. I like the idea of an internal fuse to keep things less cluttered on the outside, just not sure how I'll include it.

Thanks for sharing your opinion! Sounds like I should switch to fuses and avoid the Anderson plugs for this portion of my system. Been thinking I'll need to wire directly (without the easy disconnect plug) to the bus bar. I'll go with the Victron bus bar because it has built in fuses and will be...

Hey SacRV! I am very happy to have found this thread thanks for sharing your installation details! I recently purchased a Victron Energy - MultiPlus-II 12/3000/120-50 2x120V and have been struggling with finding a way to install in vertically, as the manual states. To install it vertically, I...

I need some advice. For the past year, I've had 4 batteries in my camper. I built the batteries from 130 Ah CALB cells I pulled from an EV I built several years ago. I have a 100 Ah or 120 Ah Overkill BMS in each battery. The batteries are connected to the buss bars with Anderson plugs to make...

Thanks Jim for sharing your opinion. I am going to order a couple of the SunPower flexible panels and setup to test for ground deployment. Hoping that by setting them out in the sun only when I want extra capacity, that the flexible panels will last longer. I understand they tend to loose power...

Thank you for your input! When you say "does not end well"... are you saying I'll let out the magic smoke? Or that one string or the other will not produce as much as expected? I selected the second strings max panel voltage to match the original string as closely as possible, trying to reduce...

I am planning an upgrade to my RV solar power system. I presently have two NewPower 165 watt panels mounted on the roof of my camper. They are wired in series as a single sting with a rated PMax voltage of 35 volts and PMax amperage of 9.43 amps. These panels and MPPT charge controller feed a...

Oh, wanted to ask, when I parallel these batteries is it best to keep the cables all the same length between the batteries and the bus bar? I've read a few threads about keeping those cables the same length for the purpose of evenly distributing the load and charge between the batteries. That...

I just test fit my 3 batteries in the custom box I've built... they don't fit as expected after I added the all-thread to pull them together. My design evolves once again. Pretty sure I'll just tape the temp sensor to the outside of the battery. The pic below shows the temp sensor placed between...

Hey, new question... where is the best place to position the temp sensor? I am building a 4S battery using CALM 130 Ah cells. I could tape the sensor to the side like Will did. OR I could feed the sensor down between the two center cells. My thought was that I'd get a better idea of the temp of...

Hello everyone, Sorry for the very long post, but after reading this entire thread, I thought I'd explain my thoughts on what is being discussed and how I plan to use this BMS in my project. I have received 3 of these 100 Amp Smart BMS devices for my project. I ordered mine through ebay, from...

Hello. I'd like to post a question and ask for confirmation of my understanding of how a situation will behave. I am building a battery bank for my RV consisting of four 12 volt batteries. Each battery is made up of four CALB 130 Ah lithium iron phosphate cells from an EV that I built and have...

Hi. In my case, I've already purchased everything or I am re-purposing things from other projects. The Victron MPPT and Battery Protect pieces were the only new items for this project. I've been trying to research proper grounding for everything... getting a little confused, but pushing through. :)

Hello, Like just about every camper sold commercially, my camper has an AC/DC converter to provide DC power and charge the FLA batteries, when plugged in to shore power, or the generator is running. In my situation, I'd like to power my RV with an onboard inverter, by simply plugging my RV 30...

Hi there! I've recently taken my home-built EV off of the road and now I have 45 CALB 130Ah cells to work with. Actually, let's call it more like 43 cells since one had died completely and another was sitting down around 2.9 VDC when I first checked it after beign in storage for 90 days. Since...