The inverter is maintenance free - as Jace says - keep it clean.
Your batteries should be fully charged at a minimum of every 6 months to keep them balanced.
You should keep you PV panels clean.
You should keep an eye on the PV output of each string. If there is a large change to the output than this could mean that you have a faulty panel or a faulty MC4 connector or if you have any PV protection that this may have tripped.
The inverter is maintenance free - as Jace says - keep it clean.
Your batteries should be fully charged at a minimum of every 6 months to keep them balanced.
You should keep you PV panels clean.
You should keep an eye on the PV output of each string. If there is a large change to the output than this could mean that you have a faulty panel or a faulty MC4 connector or if you have any PV protection that this may have tripped.