tomashubelbauer
New Member
Hi, I have a miniature solar setup with a few panels, an SCC and a 206 Ah LFP battery. I used to have the setup power 24/7 lights in my shop but I disconnected the load some time back due to making changes to the shop lighting and I never got back to reconnecting it yet.
I use a Victron SCC and the VictronConnect app has been showing the battery was bulk charging for like two months and then for a few days in a row, it would also show absorption and float charging phases were happening. But after some time, the battery is back to showing bulk charging only.
I am wondering why the battery hasn't stayed on float after it reached 100 % charge. It has internals heaters and the temperatures were around and below freezing a bit for some of the days of the last month, so maybe some of the energy went into the heaters. But still I'd expect it to be on float almost all of the time since it is not being discharged by anything other than its natural self-discarge and maybe the heaters. Oh an also the Cerbo GX and the SCC I guess, but again, is the load of those devices large enough that it would seriously cut into the state of charge of a 206 Ah battery such that it would then bulk for days again?
Is the natural self discharge of LFP batteries large enough that you'd expect they don't remain on float once fully charged and still on the SCC?
Is it bad for LFP batteries to stay on 100 % charge for too long without any loads connected all the while still being connected to the SCC?
Am I better off disconnecting the battery while it is not being in use rather than having it be connected to the charger? And should I discharge it a bit first, like to 80 % or something? I am not eager to do this since the battery runs the Cerbo and I use Victron remote monitoring to keep track of how much sunlight my panels are getting even despite not making use of that energy other that keeping the already charged battery topped up. I want to collect this data to be able to compare winters year over year.
I use a Victron SCC and the VictronConnect app has been showing the battery was bulk charging for like two months and then for a few days in a row, it would also show absorption and float charging phases were happening. But after some time, the battery is back to showing bulk charging only.
I am wondering why the battery hasn't stayed on float after it reached 100 % charge. It has internals heaters and the temperatures were around and below freezing a bit for some of the days of the last month, so maybe some of the energy went into the heaters. But still I'd expect it to be on float almost all of the time since it is not being discharged by anything other than its natural self-discarge and maybe the heaters. Oh an also the Cerbo GX and the SCC I guess, but again, is the load of those devices large enough that it would seriously cut into the state of charge of a 206 Ah battery such that it would then bulk for days again?
Is the natural self discharge of LFP batteries large enough that you'd expect they don't remain on float once fully charged and still on the SCC?
Is it bad for LFP batteries to stay on 100 % charge for too long without any loads connected all the while still being connected to the SCC?
Am I better off disconnecting the battery while it is not being in use rather than having it be connected to the charger? And should I discharge it a bit first, like to 80 % or something? I am not eager to do this since the battery runs the Cerbo and I use Victron remote monitoring to keep track of how much sunlight my panels are getting even despite not making use of that energy other that keeping the already charged battery topped up. I want to collect this data to be able to compare winters year over year.