I’m trying to get my AC500 + B300s setup to charge out in my garage, where it’s right around freezing right now. The solar panels should be giving 100+ watts in the full sun, but the AC500 gave a temperature fault and is not charging the battery.
Doesn’t the B300s have a heater? Does it use battery power to run the heater?
I have no experience with the B300S, but have you read the User Guide? It may be a new switch or a setting at the AC500
I did a quick search through the AC500 manual and didn’t find anything, but it looks like the manual is not searchable so I looked more closely and found:
When connecting B300S with the T500 adapter or AC500 to the grid, B300S is able to self-heat and get charged even at -4°F/-20°C.
… which tells me that the heater only works when plugged in to the wall. I wonder if anyone can confirm that. If so, the heater is basically useless for me…
Thanks for looking that up.
Seems sensible, since electric heaters generally draw lots of power. Running them without grid power would cycle the batteries quite a bit…
Hi @ybkpk , B300S has a built-in heating module that automatically pre-heats the battery pack at low temperatures, enabling low-temperature charging in environments as low as -20°C. Widen the use environment of the power supply.