homeowner looking to add solar panels and DC coupled batteries to house. Really want an off grid function, so when the grid’s down I can still use power and keep the solar system running so mostly self contained.
Local Power Network has allowed up to 9kW of onsite generation. Single phase. 6kW export cap.
Solar arrays planned on 3 roofs:
ENE with 10x 415W panels
WSW with 8x 415W panels
SSE with 6x 415W panels
A theoretically 9.9kW of solar! It’ll maybe hit 7kW on a very good day…
all Trina 415W rated around 45v.
Will be using Tigo’s on all due to shading issues.
Main question is what Victron kit do I need to accomplish this? It’s really not that easy compared to the Solar Edge and SunSynk type products!
Is the multiplus the right hybrid inverter? how do I accommodate 3 Solar strings? Are the MPPTs rated high enough to accommodate? Do I need a battery controller to be able to mange the batteries? Which batteries are best and is there a limit to how many I can have? Ideally need 30kWh.
I’m close to calling a Victron dealer just to talk this through! failing that I have DNO permission for a 6kW Solar Edge hybrid inverter with PowerWall (set to zero export) which is a bit of a compromise, but it’ll be easy to deliver.
thank you in advance.
paul.
