Well, I've only had the battery operational for a few minutes. Top balanced cells, sat in parallel for a few days, I assembled the battery and tested it, But to your question, no, I read the differential after this happened, from the BMS Bluetooth.
It's not a balance problem. The hi-lo difference is .002 vdc.
Turning on the inverter on seems to put enough load on the system to pull the voltage down out of open circuit voltage.
I'm going to swap inverter and CC in the morning and see what happens.
Thanks for your reply, You're probably right. With these BMS's it's kind of like the chicken or the egg thing. The voltage setting on the cc wasn't set too high as I had used it for another 12 volt setup before. The battery was 99% full, if that makes any difference. I did try setting absorb...
I'm basically bench testing a 12 volt 305 ah. LiFePo4 battery build I'm doing for a friend for his RV. I have the battery connected to an inverter for load and a Xantrex C-60 for charging, It appears to start out working fine but then CC goes open circuit soon after connecting. This open...
Back when panels were 8 - 10 dollars a watt, trackers made sense. PV is so cheap these days it doesn't make sense to add the cost, complexity and maintenance of trackers.
Yep, lost again. At 48 volts you're using 1/4 the current to do the same task as you need at 12 volts. Again, you have the same amount of energy in the batteries regardless how they are wired.
4 in parallel gives 800ah @ 6 volts. 4800 watt hours or 4.8 kwh.
4 in series gives 200 ah @ 24 volts. 4800 watt hours or 4.8 kwh.
2s2p gives 400 ah @ 12 volts. 4800 watt hours or 4.8 kwh.
See how that works? You still have the same amount of power, regardless how you configure them.
You can buy a single 550 watt solar panel for about $200. You might spend more than that in connectors, fusing and mounting hardware for those crappy, old 40 watt panels..
You can pick up a 3000 watt, 24 volt AIO inverter/charger for under $400.
This would be quite cost effective and simple to...
Being your first system, go with the lowest cost battery. Do not mix battery chemistry or sizes.
Also, The load terminals on your controller are only for a single, small load. Any larger loads should connect to the battery.