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I'm losing track of which number capacity test this is, ha ha. Another desirable outcome. 16 Xuba 3.2V 280Ah LiFePO4 cells (8S2P, 24V nominal) - Rated capacity 14,336Wh I disconnected both of the cheap 15A BMS's I had connected. No BMS's for this test. Not sure they've been doing much anyways...

Update! I just received the 24V 400Ah battery today. I ordered it 20 Oct, it was shipped 25 Oct, I received it 1 Nov (12 days). Shipped from Hong Kong to Japan to Alaska to Kentucky to Florida. No added costs (ie. no customs fees), $2999 with free shipping was the total. A signature was...

I'm in the middle of running another capacity test. Using all 16 Xuba cells this time (24V@560Ah). Rated capacity 14,336Wh. Started at 27V rested. Currently at 9,300Wh used in almost 24 hours so far. Hovering at about 26V now with a 500W load. Hoping to reach 12,186Wh or more usable capacity...

Another real-world-like capacity test. A more desirable result this time. 8 Xuba 3.2V 280Ah cells (24V nominal) - Rated capacity 7,168Wh Test Range Upper limit: 27.15V (rested voltage) Lower limit (under low C-rate load): 25.50V, 5,749Wh = 80% usable capacity 24.90V, 6,165Wh = 86% usable...

Update on my 24V 400Ah (really 348Ah) battery box. I took it completely apart today. More specs: Each 3.2V 174 Ah cell weighs about 3.62 kg (~8 lbs) Cell Dimensions: 27cm L x 3cm W x 21.5cm H (10.6" L x 1.2" W x 8.5" H) Internal resistance: All 16 cells surprisingly showed as 002 milli-ohms...

Well, I opened up the battery a bit more today. Discovered a disappointing revelation. Each of the cells are only 174 AH instead of the expected 200 AH (174 x 2 = 348 AH instead of 400 AH). Which explains why I'm not getting the total capacity I was expecting for a 400 AH battery. This falls in...

Hi everyone, I've been a lurker lately. A few weeks ago I decided to buy 16 of these 280Ah cells from Xuba (alibaba.com). About 14 kW capacity (11 kW @ 80%), closer to 10 kW usable, figuring inverter conversion/ efficiency losses. --- 4 Groups of 4 (16 pieces) total price of 280AH to America...

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Hi All, figured I'd give an update since I've been using my Xuba EVE 280's (24V@560AH, 16 cells) on & off for the last 7+ months or so. Averaging about 4KWh usage a day to match my 1KWh solar array (soon to be 3KWh). Just came in handy with Tropical storm Eta this past week here in Florida...

Jumping tracks from the shipping concerns... Ok, I ran my 2nd ad-hoc capacity test on my other half of cells from Xuba (second set of 8 cells of 16 total, 24V nominal). More of a real-world capacity test running some home office devices and kitchen appliances. The highest I was running was...

I think this is capacity test #6. Another desirable outcome. 8 Xuba 3.2V 280Ah cells (24V nominal) - Rated capacity 7,168Wh I set the Inverter/ Charger to 27V charging. Rested over night to 26.80V. Test Range Upper limit: 26.80V (rested voltage) Lower limits (varying low C-rate loads)...

I ordered and received a 24V 200A relay today. I disconnected my 200A Victron Battery Protect and swapped it out with the relay (apparently it's not good to connect a Battery Protect directly to an inverter). Originally, I had the Battery Protect low-voltage cut-off set to 23.6V. The BMS that's...

Well, my inverter just shutdown during the 2nd discharge cycle of my new 24V 400Ah LiFePO4 battery after a few days of on & off usage. After some more meter issues, I got about 8,786 Wh total (includes conversion loss). I'd been mainly using the Kill-A-Watt meter, but noticed this evening that...

I'm still trying to figure out the particular top and bottom settings. The 27V - 25V range worked out really well in this last test. Seems like a nice Goldilocks range. But, it required regular attention as I had to set the solar charge controller (SCC) above 28V to maximize the amps (current)...

Another update. 3rd discharge cycle of my new Shun Bin 24V 400Ah battery box. Got 8,913 Watts total according to my Watts-Up meter that was directly connected to the battery the whole time (never turned-off, never disconnected). No conversion-losses in this case. Averaged about 600...

Update! Relay attempt and another capacity test. Relay I made an attempt to use an Opto 22 Sold State Relay (SSR) with a cheap 15A BMS (8s 24V). Apparently, I didn't hook it up right. I was trying to figure out how to get it to shut off my new Samlex 4000W low-frequency inverter. The Opto 22...

Well, I'm using this battery now. 2nd cycle since I received it, used about 2,300 Watts DC so far (with losses considered) after full charge. All cells are balanced with one another (~3.30V per cell, 26.32V total under load). Everything's still looking good. I'm averaging about 400 Watts per...

Well, I did another capacity test. A middle capacity attempt. Meaning, not fully charged to 100% or bottoming out to 0%. Somewhere in the middle. This attempt was to try to correlate with the graph from the EVE PDF file at the drop-off points (my guestimation). Range 8 Xuba EVE 280Ah cells...

New challenge when trying to charge using the middle capacity range of the battery. After I ran my last capacity test, I decided to charge the battery using solar instead of the Inverter/ charger (which has a Lithium CC/CV charging option). The battery was not in use when I charged it back up...

I've not had any issues charging a number of different ways, utility or PV. I've used the old-school Progressive Dynamics 24V@25A designed for lead acid batteries (mainly for bulk charging). I have a cheap 24V@15A power supply that came with a Shunbin LiFePO4 battery box I bought back in...

I don't disagree with MisterSandals. When charging or over-charging using the variable power supply, be extra vigilant watching the cells. It's easy to get impatient and try to force the PS to charge faster (max Volts, max Amps). I've already over-charged my cells a few times by accident...

Oh yes, the battery voltage would drop a good 1.5V to 2V with any of these high wattage appliances. Actually tripped the power-strip on one test. I had the coffee maker, microwave, and toaster oven plugged into it. Apparently it trips at around 15A@120V (~1,800W). I think it was between the...

Looks like Steve has be the best overview pic. Disconnect the battery box from anything connected to it. Remove all the side screws that hold down the top cover. Remove top cover. You may have to wrestle with and slice away any caulking along the way. You should not have to clip any wires for...

I'm in a similar situation. I think I have a workable option in my case. My goal is to mount three 335Watt panels on a chain-link fence post (2 3/8" diameter). I wanted something where I could manually tilt both in the vertical and horizontal axis. I've been favoring this DIY approach: eBay -...

Well, I pulled the trigger on the 24V 400AH battery from Shunbin at Amazon. Thanks for the find, Woodworks! Although, I'm still somewhat skeptical spending $3,000 USD without a solid sense of confidence of what I'll be receiving. Guess we'll see if it was worth the gamble or not...

Thanks for the updates, Steve_S. It's a bummer the deal wasn't as good as hoped. After re-checking the cells in my battery box, it looks like I have 1 oddball cell. 15 are labeled the same 3.2V 174AH. The 8389 cell is slightly different. It's yellow shrink-wrapped where the others are black...

Found my panels on Craiglist. 345W panels for $150 each (new, last year's model). Only 8 miles away. Threw a few in the back of my pick-up truck. Had 'em home in less than an hour. Was a quick transaction on a Saturday afternoon. Panels have been working as expected since I got them last September.

I've seen my cells show slightly different voltages, usually during charging or discharging, with one or both end cells in the series. One end cell would show slightly higher, the other end would show slightly lower than the rest. What I did was number each of my cells and change the order of...

Now that we have a good sense of comfort the Xuba cell/ battery capacity is good (I haven’t read anyone really say otherwise). Moving on to determining Solar Charge Controller (SCC) setting options. After a good amount of tinkering today. I’m gonna see about using the solar charge settings...

Plug a box fan or osculating fan into it. If it's a modified Sine Wave, it will usually hum and not be as strong (RPM's) compared to plugging it into utility power. Compare the difference. The price seems too good to be true for a Pure Sine Wave Inverter. For a 3000 Watt Pure Sine Wave...