Recent content by Delta-V

Pretty good. I made a 2nd similar pole mount. I like it! A simple setup. The posts, U-bolts, and wood back-plate concept can be found at your local big box store. The Aluminum C-channels and a thick aluminum plate, I had to order and wait a few days before I could pick them up at the local...

Well, I've recently been tinkering with the Miady 12V@8Ah (Amazon) version. I had 2 objectives: First, replace a 12V@8Ah sealed lead-acid starter battery for my Champion 3100W inverter generator. This battery keeps dying if it sits too long (several months). Second, I have a bunch of hunting...

I tried leaving a 12V Samlex 1,000W inverter on all the time at our recreational hunt camp. Left it running unattended for 3 weeks. Came back and the thing had a continuous error beep sounding off. Have no idea how long it had stopped working, likely for days. Couldn't get it to work again. Was...

Yeah, the BMS in my 24V@400Ah (really 348Ah) Shunbin battery box stopped working a couple weeks back. We were pushing a good amount of power through it, though. Powering a truck shell camper to include the air-conditioner, plus some other accessories lights, fans, and other low-power circuits...

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...

My buddy had trouble with my 24V Shunbin battery box up at our recreation camp. He brought it back home so I could take a look at it. I did full maintenance on it. In the end, it's still working well. What happened was he drained the battery all the way to 0%. Looks like the BMS low-voltage...

For my 24V@348Ah Shunbin battery box, I set my Epever 40A Solar Charge controller to the Gel battery parameters. The only change I made was reduce the Boost Duration to the minimum setting of 10 minutes. Boost Charging voltage: 28.4V Float Charging voltage: 27.6V Guess I've been fortunate. My...

Yes, 2 packs of 8 cells paralleled together (24V@560Ah), negative to negative, positive to positive, I'm using 3/0 AWG lugged cables. Inverter Positive connection to Pack 1, inverter Negative connection to Pack 2. I have my solar charge controller connected to the Samlex inverter/ charger input...

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...

So each cell is marketed as 3V instead of 3.2V?

Thanks for sharing your results. Interesting... the Wh are less than rated, yet the Ah are more than rated. Would have figured both would be more than rated for brand new cells. 98.2Ah x 4 x 3.2V = 1,257Wh 100Ah x 4 x 3.2V = 1,280Wh 105Ah x 4 x 3.2V = 1,344Wh When I did my capacity tests, my...

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...

Looks like this is an AC power solar panel with a microinverter. Not a DC power panel. http://solarforward.com/pdf/products/AC-Modules/SPR-X20-250-BLK-AC.pdf

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...

Hmmm... Not sure I'd look at it the same way. 16S * 3.2V = 51.2V (48V Nominal) 0.05V * 16 = 0.8V 0.8V ÷ 51.2V = 1.6% The + or - accuracy of the equipment most folks are using probably wouldn't be able to make much difference from a couple percent one way or the other. Not saying it can't be...