No I didn't get that one. The one I got has a low temperature Charging shut-off at 32F. Which I have not really tested. It's running a back-up diesel heater in my basement, which stays above 40F all winter (Geothermal slab maybe?).
Even with the recent cold snap...
I paid 310 + tax back in mid January because of the "Low Temp" cut-off & the price. Just in case I ever have to use it. I would not be surprised if the low-temp sensor wasn't located on a cell. I'm not going to take the case apart just to see where's at. I just hope it's in there and plugged...
I got one in January and have been using for my Ham Radio supply. I didn't get to do a lot of testing, because of a 12V PSU failure, I wanted to put this battery into service. (I'm doing some Ham Radio stuff and need a clean 12V source). I'm using 20W of PV and a 12V charger. It works and I've...
I purchased a BtrPower ($309) lifepo4 12V 100Ah to replace using a heavy car LA battery. I used old car batteries for Ham radio, Telescope control etc. But, recently got interested in Chinese Diesel heaters. My new BtrPower has found a home with my new emergency back-up diesel heater.
Since...
One other thing that I'm wondering about is having 3 "smart" BMS boards in parallel.
1. These three units are charged by the Solar charge controller during sunny days, to approx. 49.00V (the Badgers LEDs mostly display 48.9V).
So, all three of these BMS units are still actively open for more...
LOL, I just posted on the other thread. I was thinking about buying one more, so I could have a set of 4, but my battery bank cart isn't wide enough.
I'm working on getting prepared for a grid failure, with the gear that I have now. Just need a 12V 100ah for my diesel heater.
I'm using 3 in parallel and they seemed to be working great.
But recently I've noticed the charge controller has been registering a few Ah were used to charge them up.
Normally, I don't see any charging at all, until I've used the battery bank for a while.
Maybe the large LED displays are...
Before using Rain-X, you might want to find out if it's going to harm your ground water. (Do you use well water)?
We just got a notice from our city water dept. that PFAS6 pollution in the city drinking water is 24 ppt, above the 20 ppt limit.
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...