Guru
Joined: 22/10/2019
Location: AustraliaPosts: 955
| Posted: 01:23pm 19 Jul 2024 |
Hi Mick and welcome ... I'm in Murray Bridge so we're practically neighbours.
Sorry I can't help you with boards ... that's something for Wiseguy.
Sounds like you have a fairly ambitious goal with all your requirements ... 20kW of panels is a serious system. What power are the Fronius Primo's?
I'm assumimng you've seen the discussion in the other thread about combining power boards to create 12kW inverters for those who want a bit more grunt. May be another alternative.
We have 19kW of panels and a 15kW Warpverter ... along with a "normal" 5kW Growatt GTI AC-coupled ... and are effectively offgrid .... though it is still connected to the property and handy as a backup. We also occasionally turn on a trickle charger if there's a couple grey days in a row ... though I am working on a diesel generator to use for backup as well. Oh, and our battery is a IFLA forklift battery ... 48V 980aH.
The previous owners had fitted underfloor heating but had never connected it up ... but whenever we have excess solar, it's the first thing I turn on to try and keep the place warm. There's two circuits of 3kW and they told us there's another ... but I can't find any cables ... so it's only 6kW at present. We often can run them for 5 or 6 hours a day on good solar days ... but they're a bit scarce just at present.
I'm sick of chasing wood too ... so always on the lookout for ways to keep warm.
Good luck with your projects.