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Don't waste your money on them crappy 100w Renogy panels, they don't last very long, and for the price of them you could buy nearly 2 new 420w type N half-cut cell panels, which work much better, and will still work when it's darker overcast etc, they are only £67 each if you don't pay vat and...

ANT seem to be the best out of all the BMS.

35f, which is just above freezing, then this is likely your problem, and as you said the bottom one had the problem first which will be the coldest one too, I have had LFP BMS shut down at 4c 39f before. Just so you know, low temp cut-off will normally still let you take power out, but stop you...

Both his generator or 300w from solar are tripping the 4 batteries, this could be in how the AIO is set up, if the batteries are ok.

You said bottom battery, so are they rack batteries? if so can you take the top off and test each cell with a multimeter? As it does sound like an out-of-balance battery to me, one way of tasting for an out-of-balance battery without the data lead, is to run it down a little, say 2-5% and then...

What SOC is the battery at, is one or more cells at max cell cut-off voltage? but I keep seeing people having problems with Renogy BMS lately. I missed it's not a Renogy battery.

I think we are all jealous, as I can only dream of needing a 500w inverter :)

It may be worth asking Amy for an air shipping quote if you offer to pay the difference, this depends on how soon you really want it, and it may be worth buying a cheap 1.5a+ active balancer just to get you by.

As said above the fuse is not in line with the breaker, and I would do it as Reed said, but I just added that most of those types of breakers are fake, or they don't always work properly, also, if that's the bus bar I think it is, it's made of brass and is rated for just 20-30a between...

Yanmar engine gensets seem to last forever and are popular in the boat/shipping world, made by Stephill or Pramac over here, and Weichai seem to be very popular in the UK/EU as they are cheap, we have a 30KVA Weichai at work with 41k hours on it, with it only needed basic servicing, its been...

The prices have come down loads in a single year for cheaper good quality panels as this time last year new 400w panels were £105 each now they are 420w and just £67 each, and I see many rack batteries have come down 40% in a single year.

If you heve not brought the panels yet, you need to look around more, and not at ebay amerzon etc, with the masive prices talked about, as like ShaneC said, you can buy new high end 400w+ panels for about £100 each or less, I just brought some new 420w split cell panels for £80 each ($100), and...

I just I use them too :) And just add, as I don't trust my cheaper MrPower CC I use them on both in and out of my CC too.

Like you said, It would mean postive out of the panels into the postive side of the breaker, and out of the breaker into the postive on the contoller, and don't fues the negtive side but put your disconnects there. Sorry I see now you said for disconects, not fueses. To mutch Xmas shandy.

If you was using much older panels shading in series would be a problem, but this has changed now with diodes fitted, here is some testing to show you..

I understand you whish to go with parallel, and you can with good MC4 Y type conecters, but I tell you why it's much better even if you have shading to go with higher voltage. Shading wont stop your system making power as most if not all modern panels have bypass diodes which will let the rest...

If you do some research and not just take the rights media as fact :), you will find EV sales are doing very well in the US, just well behind the rest of the develped world. The National Automobile Dealer Association (NADA) reports that through 11 months of 2023, BEV sales totaled 1,007,984 –...

Which part do you mean? " Those are not LFP cells, those are LiIon" Which must mean everything I said isn't LEP, so the seller of the BigBattery Lifepo4 battery is not LFP/Lifepo4? comments like that are how the OP and others will lose track of this thread, and clearly shows you may post a lot...

Then this tells us a lot about their business model, and we and the OP could do with knowing the real specifications of their products, especially their BMS and cells...

Steve_S, You say it's the "shifty vendors flogging great market cells" but it is the manufacturer "BigBattery" that states the 58.8V max, 55.6v-58v charging, and even gives a 10-year warranty on them with their settings... But, I mostly agree with you that charging this high will decrease the...

Yes, both batteries paralleled, then inverter positive on one battery and negative on the other, or better still run leads from both batties to the inverter.

I build EV batties for both ebikes and electric motorcycles and what I now mainly use between cells and an outer wrap is Teflon/PTFE sheets which are sold for oven trays and barbecues etc, which we then fasten with wiring loom tape, which in itself works very well, Teflon sheet is cheap around...

The cells that charge faster and then discharge faster have less capacity, either been damaged by overcharging or have been taken to a low state of charge, both by a bad BMS, or they could be B-grade cells with less capacity to start with and probably have high internal resistance, also the...

Many of us with ebikes or electric outboard boat motors that have batteries from 24v up to 85v use the Elejoy MPPT charge controller (model EL-MU400SP for boost. And EL-MD400SP or EL-DU400s for step down ) as they have adjustable outputs and are potted so semi waterproof, and cost around...

I just add this about Storage and Self Discharge in their Q&A. https://learn.fortresspower.com/external/manual/eflex-5-4-manual/article/storage?p=dc8b9a9c1b3f410556835193e66f22573ff1dced9b225dfe0940054a527a3680 Edit, why don't they give a powered on discharge rating? Only an off.

If this is the same eFlex batteries, the specs say less than 50W a month discharge, so less than 2w a day! And they claim they can be discharged down too -20C -4F!, what a joke their so-called engineers are. I hope you get it sorted out soon...

I just add, looking at your other thread, you have to plan this out, first your pump is 120w, but pumps can pull 10x this on start up, and a standard LA battery is not meant for deep cycling, you really need a LA deep cycle battery (110ah+) or Lifepo4 (much better), then you need to work out how...

They look good but super expensive, especially for a 10a controller at £200.

I know you are in the US but this is what i'm using for a low voltage battery cut off, as you never want to take a LA battery below 12v ish, as it will damage them in 5-10 discharges. XH-M609 DC 12-36V Battery Over Discharge Protection Module Low Voltage Cut-Off...

Like Bud said, it sounds like your solar panel is too small, I have a similar setup using the linked charge controller which is powered from the solar, but I have 300w of panels powering a 12v 3a pump, with a low voltage cut-off of 12.5v pulling power from 2x 110ah LA deep cycle batteries, but...

You could start with checking to see if there is any resistance/continuity between the shunt/battery bank and the RPI power supply?

Can you test the output signal voltage from the smart shunt? As I'm wondering if it is giving out full battery voltage which is feeding into the RPI. And you did say the battery/shunt is not connected to the RPI power supply?

I'm wondering if the reason for the total battery drain was something to do with the RPI, or the RPI wiring etc, as it sounds like it may have had an internal short, or wired wrong? And when you brought the batteries back up, something had to give...

Some of the farms around me here in the UK with sandy dryer ground use a DIY made 300mm x 150mm, by 20mm thick (1ft x 6") steel plate with 3x 45cm (18") prongs made from steel rebar welded to the plate, which I have been told works better than the old way of using 3x 6ft rods staked 5 or 6 ft...

Reliable 1500w 24v 250v 50hz & 2000w 24v 240v 50Hz, (not the newer WZRELB types) Switched on, no loads 12w & 15w, the 1500w uses 1610w at 1500w output, and the 2000w uses 2180w. One more thing, the 2000w inverter shuts down at about 2100w, but the 1500w inverter will not shut down even at 2500w...