Added a chain sharpener, 12V grinder, upped the wattage drain to 112W, volts around 12.01, approaching 102Ah
I found a battery on ebay, free shipping, 100Ah $299... im going to do a load test on it... should i post a video here?
- Thread starter Supervstech
- Start date
With well over 103Ah, I'm calling this battery a great buy
Next is test the low voltage disconnect. The sensor is taped to the top of the cells, easy to reach and drop in ice water.
I stopped the test at 11.15V 105.0Ah
Short_Shot
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Pulling full capacity once or twice is not bad for a lithium battery. It's required for a true capacity test.
As for current, anything less than 1c is appropriate as long as the bms can handle it.
You'll know if it was too much current if the voltage rebounds to more than 12v when the test is done. If it doesn't, it means you're still well into the discharge knee, the battery is in good condition, and your wiring connections are good.
Q-Dog
¯\_(ツ)_/¯
I don't need these, but the price has me thinking about a couple of new projects now.
Are those screenshots from the BMS App, or from your external monitor App?
Victron shunt app.
Nope, I didn’t disassemble the pack completely… I might, but opening it up and examining everything was good for me.
Hi do you know if BMS setting can be accessed and changed ?
I do not.
12V100AH Lithium Iron LIFEPO4 BMS Low Temp SOLAR RV BOAT OFFGRID GOLF CART | eBay
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4 day shipping... nice case I haven't seen before.
Description shows 2 year warranty, and adjustable low temp disconnect.
They have a rack mounted 48V 50AH battery for $700.
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Aside from the EG4 100AH for $1500, this has to be the cheapest battery on the market, right?
I just don't see any reviews of this model, so it seems like a real bad idea to actually buy one.
I bought one of the Global Power 12V 100ah batteries also. The seller is in the US and I had a question & he promptly answered. It arrived quickly & looks to be in perfect shape. The BMS display said 13.3V & 93%. My DVM's read 13.21 & 13.24. The BMS & the Xantrex charger didn't play well together when I charged it up the 1st time. It was OK for a little while, 14.1V, 34.9 amps. I stepped out of the garage for a couple of minutes and Xantrex was limit cycling. I don't think I got more than 3 or 4 ah charge.
I figured it was charged it up, reset my Trimetric battery monitor to 100%, discharged it to 37%, recharged it to 60% (according to the battery monitor not the display). I'll have the van out in the sun tomorrow & I'll charge it back up to 100%. The Victron SCC in the van has a lifepo setting so that should go better than with the Xantrex.
The BMS SOC display appears to be worthless. After discharging 53 ah and resting open loop all night it showed 79% SOC.
I figured it was charged it up, reset my Trimetric battery monitor to 100%, discharged it to 37%, recharged it to 60% (according to the battery monitor not the display). I'll have the van out in the sun tomorrow & I'll charge it back up to 100%. The Victron SCC in the van has a lifepo setting so that should go better than with the Xantrex.
The BMS SOC display appears to be worthless. After discharging 53 ah and resting open loop all night it showed 79% SOC.
But no one else on the market comes close to Eg4. Maybe some bargain basement used models from bigbattery. But we all have heard the bigbattery quality stories.
My math has it $200 less money for the same watthours, and lighter to carry. And free shipping, and 4 day delivery from USA warehouse... no Brainerd.
2year warranty instead of 10 year though...
Well, I probably messed up somewhere.
Five out of four people have problems with math.
