Hi all, I am hoping that I can get some guidance and suggestions from those that are more knowledgable on solar than myself. A retired neighbour is wanting to install a small system into his shed. He has a small workshop where he tends to use rechargeable tools and then a large space that his grandchildren use occasionally for weekend stayovers, on a rural property in the Hunter Valley.
He has already purchased 4 x 190w solar panels - specs CEEG model SST SE 190-72M, Pmax 190w, 5.08 Amps, Open cct volts 44.48v, SL open cut current 5.42A
He would require a MPPT, inverter and batteries plus the option of utilising a generator for charging batteries if required in overcast weather periods.
Expected power usage:
1. Small workshop use of rechargeable tools and the occasional use of say an electric saw where a bit of extra grunt is needed
2. General lighting (led's) probably around 6-7 lights -should these be 12v or 240v?
3. Occassion also use of shed by grandkids (late teens or so) - most of the lights would be utilised, say 6 hours overnight, also they have portable car fridges such as Engel, Walcott, etc around 40-60 litres. I haven't been able to find much detail on something like this, however I would expect that they may draw around 2A each, and there could be up to 3 of these units in use.
Maybe it may be beneficial for the neighbour to just buy a bar fridge?
My thinking was to go with 12v lighting, MPPT 20A unit, inverter 1500w, batteries say 4 x 120ah, given that panels total 760W.
I would gratefully appreciate any advice and suggested equipment......thanks in advance