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I run the CORE from the 24 volt bank it controls. No issues. I also use 24v supply for the expansion unit from the CORE. No issues with using 24V for the switches and solenoids as well - they are all rated to 30V. Works like a treat now and keeps on the wifi no issues. The only downside is that...

Two winters later . . . Last year did not go so well. really low temps (-15 cel) and the watts the heating pad through out was not enough to keep up. Fortunately the BMS did and I switched to the lead carbon bank to maintain the heaters below zero. Seems to be the only way as the BMS shuts off...

You may want to consider Lead Carbon. They are right on the price point for cycles, etc. What you have not considered as well is that you need twice the amount of lead acid batteries than LiFePO4 as LA only takes you down to 50% before a cycle and they have way less cycles.

Since I had a Daly, Overkill, Electrodacus and they all failed me, I spent the money and went for Batrium. The expansion board with the mechanical relays control the heating pads and the cooling fan. The one relay on the CORE controls the solenoid that is also mechanical. I leave my off grid...

And I am at 6800 ft in the Springs so just saying . . . :)

I never have had to go to Batrium yet for direct support but their email replies have been good about the Android APP (which does not work yet) and some issues with the WIFI. They are 14 hours out so have some thought about that. My daughter lives in Australia so we are used to the delay.

Blue Sea 7717 ML-RBS Remote Battery Switch w/Manual Control Auto-Release - 24V. I talked directly to Blue Sea to make sure this one would work. It is really reliable - big clunk when it goes on or off. Available on Amazon...

Hey folks - Thought I would update you on my new BMS. Reason for switching: Initially on this same battery (EVE 280AH 24v 8S1P) I had an ELECTRODACUS. It was a confusing/technically tough install and did not give enough juice as a balancer - also was a passive balancer. I lost power a few times...

I also have a shunt to go with it.

Yes

Blue Sea 2 X 500amp Battery bank Switches. One used and one still in package. $45 each. Blue Sea 1 X 700amp Battery Switch. $45. Blue Sea two post battery terminal connectors. $20 each. $100 plus shipping for the lot.

1 X ANL Fuse Connection Box from BLUE SEA - $25 7 X 100 amp ANL fuses - $20 7 X 200 amp ANL fuses - $20 $60 plus shipping.

Not much to say - works great. replaced by a Batrium BMS Longmons. $25 plus shipping.

Solar BMS (Solar Battery Management System) is a solar charge controller designed to replace the Lead Acid solar charge controllers most people use today in Offgrid, RV, Boats and multiple other applications with 12V and 24V systems. Solar BMS can be used with 3 up to 8 Lithium cells in series...

Comes with 24 inch long 8ga wires soldered to the board as shown. BMS For 8 cell, 24v volt Lithium-iron-phosphate DIY batteries 100 amp continuous charge or discharge current Low Temperature Charging cutoff at -1c (2 probes) Remote shutoff switch Fully programmable with IOS app, Android app, or...

Yes it is.

Sold

Yes they are still available.

Colorado.

I would not run 200amps from them. These are early versions from Orient Power and my experience has been they are not really 200amp cells - plus I wired them for 100 amps. Also the BMS will cut them out at 100amps.

Also A123 are lots of small cells put together (12 or so?). In my experience the more cells, the more that can go wrong. That is why I am going to 8S from 8S2P.

Agree. The type of cells I have are listed at Overkill for $155 each and that does not include shipping. Ali Express you will wait forever and they will not be that much cheaper.

Heard. So new cells are $120 each plus shipping, BMS were $57 USD plus shipping, wires and connectors were $20, digital VM was $10 and containers were $15. Without labour and using 50% on the cells I get around $350 for each battery. GTG at that price.

These batteries were constructed with the remainder of an 24v 8S2P battery that I designed and constructed two years ago. After some use on a gentle solar system two of the cells went wonky (low resistance) and really mucked up the capacity of the bank. I removed the bad cells, top balanced...

Hey there. I have done this - with 1 BMS and 8S2P. It is the best way to go - instead of two paralell banks. There are a few things in paralell LiFePO4 banks you need to be cognizant of (maybe you already are). 1. If a cell voltage on one of the banks hits critical (either up or down) it will...

Details can be found here: https://overkillsolar.com/ I have just broken down an 200AH 8S2P 24V LiFePO4 battery due to some cell issues (lack of resistance in two cells) and am converting them to 12V 4S units with the remaining good cells. The 24V 8S BMS I have (which is awesome) is no longer...

I just ordered 8 280AH LiFePO4 cells to replace this pack. They will get here by June - meantime I will use this pack which needs to be nursed literally. Took a day to bring it back and it is operating okay on lower amp and voltage charge. I am giving it to the MPPT controller who can best use...

I think I may have a few rotten cells - this battery has been used for many things over the past few years. I have replaced 4 cells so far over 3 years and am sure that I should just redo the entire battery. I will adjust the voltage and current down on the charge and see if that can help. Right...

The battery was already together and had been top balanced beforehand. It has been in storage for a half year since then. As for temps it has a cover now and pulling that off will be a real PITA. Not trying to make excuses but am going to California on vacation in 3 days and now that it is in I...

Hey just installed a 24 V 8S2P into the trailer after a year being in storage. One of the cells during charging keeps jumping up over 3.65V and the BMS shits the charge down, balances and then starts it again. Is this normal? Never seen this before.

Hey so good news. I opened the garage early this morning and let the -1cel weather in. The battery heater system performed marvelously and did not use as much current to warm as I thought it did. I kept the battery at 50 Fah with no issues at all and the little battery it was on (12AH) had no...

24 hr test complete. It did not get cold enough (close to freezing) in the garage last night so I upped the temp control to 50F late today. When I did that the temp of the battery was 48.4F. In an hour the battery was over 50F - so the pads and the bars worked very well. Happy with the test but...

Today I installed the heating pads/bars in the LiFePO4 battery. I am now conducting an overnight test as it is supposed to drop below 0 cel. As you can see I set the temp control to start heating at 38 F and stop heating when the battery is 42 F. The little battery I have as a test 12V power...

Hey so tests are ongoing and I have learned a lot so far. First 4 X 7W heating pads on a 2 X 14 inch aluminum strip gets too hot, even on a heat sink. I also agree with most comments about a bigger piece of aluminum but I am using scraps and it seems to be working well. I have also got the...

I have this aluminum hanging around. The LiFePO4 battery and box is already built. These strips will serve I am fairly sure - one on either side of the battery bank. But we shall see.