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I have a small boat with two 24 volt homebuilt lifepo4 batteries, each with a separate BMS and each connected to a separate motor. Recently I added 3 solar panels connected in series and a victron SCC. My plan is to use a BlueSeas battery switch to connect the SCC to either battery 1 or 2 for...

I have a victron 15/75 scc connected to my 24v battery and two renogy 175 flexible panels connected in series. The victron powers up due to the battery power but does not charge the battery even though the panels are unobstructed and it is a nice sunny day. I'm not sure if the problem is with...

I have a Sol-Ark 12k and a DIY 48v 280AH battery with an overkill bms. Overkill does not have a canbus port. Is canbus really necessary. Won't the solark control charge/discharge via SOC

Ok, so it is my first winter with my solar panels and as expected they are now covered in snow. I have the ability to redirect water from my hot water heater to an outside hose bib. Should I just hose them down with hot water, or is this going to break the panels?

I bought a Blue Sea fuse block for my 16s 280AH battery build. It is the one with 12 terminals, 30 amps per terminal 100 amps per block. Its purpose is to provide protection for low power items like the alarm horn, bms, pack voltage sensor/relay etc. But i see on the specs on the back of the...

I have sixteen 280AH cells which I plan on using to make a 16s 48v battery. My problems is that one of the cells is weak, 265 AH. But I also have a spare 60 Ah cell. Can I just add that in parallel to the weak cell to make up the difference. Sort of a 16s with a small kicker? Thanks,

It's known that LiFePO4 batteries can safely discharge between -20 and 60 degrees C, but what is the temperature at which they discharge most efficiently? And does 10 degrees either side of this temperature affect the efficiency to any significant degree?

I have one of those Chinese capacity testers with the fan. I have used it in the past to test 60 AH and 100 AH batteries without problems. Now that I am testing 280 AH cells at 18 amps (max I can get it to go) I noticed that the voltage displayed on tester is 0.3 volts less than that measured...

I am charging each of my 280 AH cells to 3.6 volts in order to do a capacity test. I use a non-programable bench charger capable of 10 amps. Setting the power supply at 3.6 volts and waiting for the current to drop off takes forever once the charger is in CV mode and the current decreases...

Are there ABYC standards for using LIF batteries as traction batteries on a boat?

If one is building a large battery, one with 4 parallel pacts and thus 4 bms units, but only one charger, how do you connect all 4 BMS units to the charger to lower the current when a pack is nearing the end of its charge?

I am building a 60kWh LiFePO4 battery bank to power the motor of a salt water boat. The normal discharge rate will be 0.125c and never more than 0.2c. I want to enclose the battery in a water tight and air tight polycarbonate case to prevent exposure to salt air. Do i need to worry about heat...

My son just bought a trolling motor for his fishing raft. So I built him a 60Ah LiFePO4 battery which all fit neatly in a fat 50 ammo can. The can is tough, has a nice handle, is waterproof (if you get a used one with a good rubber seal, or buy new), and it floats. Here are the steps: 1. Buy...

Is there any difference between the Jr and "Sr" versions of the Orion 2 BMS units except for the number of cell voltage taps and thermal sensors? Is the "Sr" version more robust?

I'm trying to connect 22guage bms wires to fortune 3/8 inch terminals. I have some anchor connectors that fit over the battery terminals but the heat shrink is way too big for the wires. I remember will talking about some in a video but I have reviewed about 20 videos and cannot find the...

For those of you who have built DYI power walls, have you found that it affects your house insurance; either thru raised rates or insurance companies refusing to insure a home with a DIY power wall?

I have recently purchased four 60Ah fortune cells and am trying to charge them individually with a 30v 10A bench power supply. I set the ps to 3.62 volts and connected it to a cell. At first it drew close to 10 amps. Now after about 10 hours it is drawing 2.7 amps. I want to charge it to...

Can Fortune LifePO4 cells operate on their side, or do they need to remain upright? I ask because four 60AH cells fit very nicely into a 50mm ammo can if you lay them on their side.

I have recently retired and am building a new much smaller house. It will have a totally unobstructed southern roof on which I will place 9kw of panels in 3 equal strings. I would like to use a hybrid inverter to tie it to the grid and have a large 48v battery bank which I will build. My goal...

Why are some LiFePO4 batteries limited as to their serial and parallel connections and some are not? Is it due to the structure of the batteries or something about the BMS? Thanks

Does anyone have experience with Epropulsion batteries. They advertise a 8960 Wh, 48 volt battery for $3999. This works out to 44.6 cents per watt hour. LiFePO4 chemistry with 3000+ cycles. It seems too good to be correct. Just wondering if anyone has used one. These batteries are used for...

I am designing a mobile off grid 24 volt system that has a fairly constant 1500 watt load that will run for 7 hours a day while the sun is shining (hopefully shining). There will be some times when the battery will need to supply almost the entire load, but only for 10-15 minutes, so massive...

If I have an array that is producing 1kW connected to a battery charge controller that can handle 600 watts and also a 800 watt load, will the charge controller be clipping because 1kw is going thru it, or do you subtract the 800 watt load from the total meaning that the charge controller only...

Connect the panel, adjust the rheostat until you read max power. There is likely something out there that already does, but I couldn't find it so I just built one.

I am a bit confused by the max wattage recommendations for a charge controller for a 2000w 24v system. In Will's blueprints it shows one EPEVER 40a CC and also states that it can be used with 400-2000w of solar panels. The Charge controller section of this website shows that the 40 amp EPEVER...