I have an odd use case, I am hoping the assembled smart people can help me. On my boat I have a Multiplus II 3000, a MPPT 50/100 with 300w of solar panels, 600ah of lifepo4. I am storing the boat on land in a humid location for hurricane season in a place without 120v shore power. I have a dehumidifier I want to run on board and I have come up with the following case.
Set the low input cutoff to 13v (30% Soc on lifepo4), set the restart at 13.3v (90%). The dehumidifier can run until it gets to 13v and shuts off, then the solar can refill the batteries until it’s at 13.3v at which time it will re-engage the inverter allowing the dehumidifier to run.
One question is - while the solar panels are receiving sunlight will the ‘line voltage’ from the solar input rise above the 13.3v restart level causing the inverter to come back on and use the current from the solar instead of charging the batteries?
If this is the case, I could use a lamp timer to make sure the dehumidifier can only run at night.
If anyone has a more elegant solution than this, I am happy to hear it. Thank you all.