Growatt SPF 3000TL LVM Low Battery Voltage Alarm


New Member
Jul 17, 2021
I have a Growatt SPF 3000TL LVM Hybrid Inverter to which I have connected a Big Battery 48V NMC based battery:

The voltage range of the battery is specified as 36-50.4V. Using the "User-Defined" battery type I had no issue setting the charging voltages to 50.4. Also no issue setting the low cut-off voltage to 40V.

It appears that in User-Defined mode though, the inverter still uses some of the Lead-Acid functions as the Low DC Warning alarm comes on at 44V matching the table below. I'd love to be able to change this to 42V instead but it does not seem to be one of the settings available to change. In the web based interface I do see some options to modify specific registers. Does anyone know if it is possible to make changes to this setting?