Hi guys 

 

I am struggling with this issue. My I have a MUST 3kw inverter using 3 panels on the roof and a 24v lithium battery.

 

my issue is this … once power goes out in the night and the appliances use up the battery the inverter won’t power on from the solar panels in the morning. 
 

is there a setting that can get this inverter to wake up and charge the battery and supply the loads?

 

im stumped here, Iv only seen bigger setups with this capability 

How does your system reset? It sounds like the battery is shutting down and not powering the battery terminals. Try increasing cut off voltage by 0.5-1V so the inverter turns off sooner and leaves a little more reserve power in the battery.

I would guess the battery will charge even if the inverter is switched off when there is enough solar in the mornings providing the battery is still high enough to power the inverter. 

Try the setting @Shadders indicated. 

Which setting is the cut off setting?

6 hours ago, Sphiwe723 said:

Which setting is the cut off setting?

Should be setting 19

If your Batteries are used to shutdown, then your Batteries will recharge first to a predetermined % before AC power is restored. 
This could be 30% ?  You need to monitor at what stage the Inverter resets and then check what the charge % is. Use that % as your cut off. Not sure if your Inverter has a program item that allows you to change the "AC restore"%
 

Edited August 17, 2024Aug 17 by zsde

Question is,  is it the inverter that must wake up or the BMS in the battery . That what you have to determine and the only way you going to figure it out is when everything is shut down to test the lithium battery for the volts expected to be at shut down volts of around 22 volts .