the price of cells has dropped significantly in the last 6 months, I would say its a good time to build your own. I used eve 304ah cells from 18650 battery store, when I bought my cells in the fall they were 145 each now they are down to 109 each. so 500ish including you BMS you get a 300AH battery, I don't know of any premade 300Ah that is even close in price to that. Mine are working good so far, just put them into the camper last week and moved the 280AH one out of there into the 5th wheel with the other 2. for a BMS I bought a JBD 150AH one a long time ago and it seams to be working good now. if I didn't already have that I probably would have went with a JK with the higher active balancing.
www.eco-worthy.com
its nice to see they are coming down finally, in the US at least. up here its still crazy expensive for a 300AH. but ya you picked a pretty cheep one with my example I was using high quality parts, more capacity, and the weight is less and the size is quite a bit smaller on the DIY, probably due to them using a bunch of 100 or 150ah cells instead of just 4..280ah lfp battery $539 with 250a BMS with a warranty. Personally id spring a few hundred more on better rep company like Sok, their 5kwh batteries are only $1100
LiFePO4 12V 280Ah Lithium Iron Phosphate Battery | ECO-WORTHY
ECO-WORTHY LiFePO4 12V Lithium Iron Phosphate Battery has twice the power, half the weight, and lasts 8 times longer than a sealed lead acid battery, no maintenance, extremely safe and very low toxicity for environment. Our line of LiFePO4 offer a solution to demanding applications that require...
Yeah I went with sok 48v rack batteries 100ah. Like $1500 each, they have the cheaper ones for $1099 too. I think if I DIY I'd might save $200-300 each depending on how I'd make the case but it's well worth that to have a warranty and guarantee. Also the time cost to build a battery is a big factor.
What kind of case? This was my biggest worry when considering DIY. The Sok 100ah cheap batteries are $1100 vs $800 if diy it seems. I've been considering building a 20kwh battery and even possibly swapping out my eg4 and sok BMS with something else.
I have about ~5kWh of 12V ‘cheapo’ manufactured battery bank with two 140Ah and one 200Ah at a cost of $900-$1000-ish total. Can’t remember exactly.
Unclear based on the other posted numbers.
This is my reasoning. Under my coach steps is a bunch of wasted space then my 12v inverter is right there. If I fill those with cells and DIY a case it'll fit 10-20kw and be protected.
Unless you're an avid DIY type, I'd suggest purchasing off-the-shelf. There's a bit of a learning curve with a DIY build. You may get a tad more bang for the buck with a DIY build, but it's nothing like it used to be. Off-the-shelf prices are very competitive these days.
when I bought my 304AH cells a 300AH premade was still 2400Cdn I got all my stuff I need to build the battery for about 8-900 cdn.. so at that time it was a huge savings.. I was just looking the cheep 300ah batteries up here are 1250.00cdn still so there has been a big drop, but at the same time if I bought my sells today it would be about 6-700 to build my battery so still quite a bit of savings in building your own.
That is basically what I have in my work truck, twin EVE 280ah batteries with a victron 12/3000/120, I have a 1/0 DLO positive and negative cable from the alternator supplying a 50amp Redarc DC/DC charger that I am increasing the charging with additional chargers to at least 150-200amps.
