Hi I am considering putting in an inverter/battery solution so I can have a power back-up (on critical loads only) when the power grid goes down. With a view to future expansion with addition of solar, I am considering a Multiplus 48/5000 coupled with 2x Pylontech 3.5kWh lithium ion batteries. Is there any reason this wouldn't work? I don't really expect to use the full capacity of the inverter right as a back-up solution. Many thanks for any advice, trying to educate myself.