Re: Need advise
The hybrid inverters need to have batteries all the time. They just don't need so many of them as a straight off-grid system does. Plus, any loads you want to be battery backed, run on the inverter all the time meaning you can't switch off the inverter system and just be on the grid without rewiring these loads. Most setups do have a bypass switch for doing this however. My advice is to do a straight grid-tied system as it is more efficient, way more reliable and more cost effective - and just get a generator for those infrequent outages. Of course if you have lots of money to spend, give me a call.
2.7kW Trina/Xantrex GT, 2.7kW Trina/SolarEdge, 2kW CSI/SMA GT, Solar well pump on 6, 25yr old Holeck 48W modules. Toyota SR5 converted to 108V EV. Prius w/Enginer PHEV conversion. BSEE, C11-residential, NABCEP, SunnyPro >450kW installed
"Faced with the choice between changing one's mind and proving that there is no need to do so, almost everyone gets busy on the proof." - John Kenneth Galbraith