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1st step to saving $ is batteries. For what 200amp hours of 12v Battleborns cost you can buy 280ah of 48v. That's almost 6 times the storage. No brainer.

Yeah weird how hard it is to find info on growatt products domestically.

You need a higher voltage than the battery to charge. Put them in series to obtain this, but check the voltage limit of your charge controller first. You should get the sum of the two voltages at the average of the two amperages.

No, did you miss the part where a 1948 vette doesnt exist? That's kinda my central point about the 420ah cells.

If you can't tell a 1984 vette from what a 1948 would perceivably look like you probably shouldn't be buying anything online. This whole youtube solar/lifepo4 community is absolutely obsessed with capacity testing.

So they should be returning roughly 2/3 of your money.

Buyer beware, due diligence and all that. If I put up a pic of a 1984 Corvette for $7K and write 1948 would people actually expect a car that a) doesn't exist (and if it did would be worth 100's of thousands) and b) looked identical to a 1984 model as pictured..... Was the price they paid fair...

I just can't believe anyone would order a cell exactly the same dimensions as a 240ah and believe it was 420ah when nothing close to that even exists. Are they still not having any luck getting a refund or did they also pay a price also surprisingly commensurate with a 240ah cell and still not...

I built my whole rig for $2k less than cost of his batteries.

These protections are built into $500 hybrid inverter/chargers.

If you are working with older equipment sure it's a good practice, but modern hybrid charger/inverters use HTC thermistors to protect against in rush current. Like I say I haven't seen it in a manual yet for a new unit.

Who makes 420ah cells...nobody. If you used a cc just call them (cc co.) and they'll pull the money right out of the sellers account (and likely credit you) until resolved. Obviously a TYPO on the rating.

Even at 240ah its still 5x the capacity rather than 7x. Even better if you negotiate a refund.

I guess there's a risk, but the savings are huge. I mean 16 280ah Eve cells @ 48V =13.4kwh for $1600. Spend that on 1.5 Battleborns gets you 150ah @ 12V or 1.8kwh.... :ROFLMAO:

Hey in China Alibaba was/is a bit of a joke especially early on. Ordering a watering can and getting a front-end loader. Heard similar tales about Dragon Mart there.....:ROFLMAO: Yeah, there you are allowed to be late to a meeting if you are the seller, but not the buyer. Also if you get...

I just take 280 divide it by 40 (7) (which is how many hours to charge/discharge at that rate) and invert, easier on the brain...lol Yeah Basen/Eve is the route I took. First I calculated 280ah was the best value, then it was a tossup between Eve and Lishen brands, then saw some failed capacity...

How is the discharge of a 280ah cell at 40 amps a rate of .143C? (from original testing comment) Never heard of the company, sucks the batteries didn't meet spec, and yeah, always pay with a cc for the reasons you state above. I would recommend Gloria at Basen, I guess I was lucky.

If you're getting new cells they usually ship about half charged, mine were 3.29 volts each. Just check each one when they arrive. Basically you're building two entirely separate 8S 24v paks (obviously the s tands for series), wiring the BMS is pretty simple, once you put on your buss bars pos...

It just complicates the setup. After you setup 2 series strings of 8 cells each, tie the pos masters together and to the inverter/charger pos, then hook up one bms to each 8s banks' master negative and then tie the bms outputs together and to the negative of the inverter/charger. Make sure the...

I guess what I mean is either way, (parallel or series) there's no feasible way to monitor the batteries as individual 12v "cells" in a 48v series or 12V parallel group. The tangent I went off on was about the youtube guy building a parallel 12v system of like 2000ah. It's such a dumb way to do...

This is exactly the problem with 12V parallel systems, It's a bit of a weird ask because basically you already passively balance cells just by putting them in parallel, and also when you charge them in parallel (which I suspect is all the device you showed does if it is even an active balancer)...

I thought the 24V guy was the trailer guy, this is the 12V balancer guy. Yeah these message boards can get confusing, lol

No, the internal bms's manage the individual cells (4x3.2V or whatever) inside each battery. What I'm saying get a BMS (which is also a balancer) rather than the balancer you suggested to manage each of the 4 or 5 12V batteries in your pack.

There are hundreds on Alibaba and Amazon and ebay. Just go 12v, 4 or 8s ( allows expansion from 4 cells) and whatever amperage you want to draw at those 12V in parallel so you'll want say 200 amps for 2400 watts (200x12) and so on...my 16 cell 48v pack balances to 1mv but that will always...

A bms sees each battery as an individual cell yes. It constantly monitors the voltage of each battery and balances them individually. It also monitors the total pack voltage. I know 12V components are easier to source an all that but the ultimate goal is if you are using 120V appliances then the...

If you have 16 cells why not get a 48v charger/inverter - that would be my first question. for 24V you would want to get 2 8S 24V BMS's for your two parallel banks of 8 cells each. The 24V system will somewhat limit the inverter output, thats why 48V systems makes way more sense.

If you have 16 cells why not get a 48v charger/inverter - that would be my first question. for 24V you would want to get 2 8S 24V BMS's for your two parallel banks of 8 cells each. The 24V system will somewhat limit the inverter output, thats why 48V systems makes way more sense.

Just get a 4-8S 48V BMS, probably cheaper and way better.

Go 48V if you can. Even with 24v the inverter/charge controller supplies your panel with 120v which feeds/charges your 12v system. No need for transformers. All in ones are great growatt/mpp etc. For batteries you cant beat eve 280AH 3.2v cells I have a 16s 48v system and a MPP3048MK-LV with...

Yes, customs in some countries..corrupt, inefficient I'm sure. Building packs with BMS is simple though.

I did this slotted floating box design with a ratchet strap. Crank it up for compression, pop it loose and you can easily remove the cells for winter storage.

Any money you save will go to batteries and other components. So many people using BBs for the "simplicity" Not knocking the product but holy $$$$. I'd have to buy 12+ BBs to match the capacity if my lifepo4 16s 48v bank which was $1800usd all in.