Hi dear Victron community!
I have a grid connected three phase AC-out-coupled system with Multiplus-II, CerboGX, SmartShunt, Lynx distributor and battery balancers. Battery pack is 48V 600Ah made from 12 pcs of 12V lead acid GEL batteries (picture below).
I would like to connect a back-up generator for the wintertime to help the batteries when the electricity price is really high and the SOC is getting low. There is three possible solutions in my mind.
1. Generator and changover switch to AC in of MPII. That needs a very powerful 3-phase generator which is expensive and there are troubles with feed-in.
2. Generator and Skylla charger to the DC side. Not a big generator needed but there is no VE.bus communication with the system.
3. Generator and another Multiplus (preferred). This way I could have intelligent communication, more flexibility and even one extra 1 phase output from the extra Multiplus. Is it possible and logical this way? Red colour is for new equipment. Is there anything else I should add (generator auto start for sure)?
Any ideas, suggestions or examples are welcome...