I’m off grid with a Quattro and Pylontech US5000 batteries talking with the system and a SmartSolar MPPT.
I’m trying to figure out how low I can discharge my batteries without the system shutting down. I don’t see anything in settings. Can I go to 10% SOC?
And I suppose I want to set the Quattro to shut down at 10% or something above 0% so that the MPPT will remain powered so it can provide power when the sun starts shining to charge the system back up (and bring the Quattro back online)?
I may not understood your question exactly, but I believe this below will tell when the inverter will shutdown and when it will recover.
Both on voltage and on SOC.
I think you’re right, it’s not in Venus but rather in the Quattro settings. Pylontech shuts down the batteries at 44.5V, so I think I’ll have the Quattro shut off loads at 45V. Not sure what kind of SOC that would equate to, but seems like it should work. I’ll also have my Node Red start the generator at 46V, so should avoid any issues.
You could make a little experiment of your own.
Put a constant/average load on the inverter output, set an impossible low value on shutdown, like 30V and start to discharge the batteries until the batteries shutdown because of their BMS.
Make a note about each SOC percent and its voltage.
At the end, you’ll have the battery info mapped and you’ll know what to expect.
Don’t worry, the battery wont be harmed.
