That extra info might be real good for calculating your KWH based on typical weather. A person might actually learn they're going to need twice the PV they were planning to buy. Had I known how little power I was going to get from my Panels, I probably would have waited a few years.
It seems like they're using some tricks to avoid heating the Cells with a cell-heater (resistive wire?).
Once the cell-temp drops down between 0 and -10 C, the BMS will charge at low current.
They say that (low current charging) will slowly heat up the Cells, and allowing for faster charging...
Solar Radiation Monitoring Laboratory Department of Physics
http://solardat.uoregon.edu/SunChartProgram.html this will help you calculate what you need.
I used before I built the adjustable tilt into my semi-fixed array rack.
If you do want to make it adjustable, you might want to add a one...
Thanks! They are at 4.0833 right now. The TS-45 is set for 49 volts. I'll take it down to 48v, (4.0) next time I get down there with the laptop.
Since I'm 75 years old, maybe I don't need these batteries to last for a very long time.. :)
I'm trying to use these for a back-up power source during grid failures. So, staying at a good SOC would be idea.
I've read advice somewhere about not leaving them at full-charge for too long. Also discharging them (by some percentage?) periodically.
So, I'm thinking of setting my solar charger...
Yeah, it seems like mine might be 12 "NMC/LI-Ion Cells". 12 x 4.2v = 50.4v the recommended charge voltage.
Mine have been running 50.4v for a while. I wonder if a little lower charge voltage would extend the cycle life? Maybe 49V or 4.0833v per cell?
My order just came in, but I'm not sure if I have the 40Ah (gen 2) or the old 33Ah (gen 1) models.
There's a tiny sticker on the side of the units that says (2) next to the "QC-Pass" sticker. So maybe it was QC inspector #2 or it's a Generation 2 model. No paperwork.
BB Chat support told me they...