Hi,
I am in the process of installing a 4kW tracking PV array (nearly done) at my home.
I have a ~30kWh 48V LiFePO4-based battery available (not yet set up) and a spare 5kW Multiplus II I was planing to use with the battery. The plan was to use these as a semi-'grid-tied' (hybrid?) supply to the garage which also houses my EV charge point, providing power to the garage (and ideally on to the house) when it is available from the PV and/or battery or using the grid (from the house) when it is not.
I had planned to use Enphase microinverters with the 10 x 380Wp tracker PV modules which I bought some years ago and which are brand new but upon finally getting them out of storage, I see they are not compatible with my much more recently purchased PV modules (doh!).
The house already has 2 x 5kW Multiplus IIs and a ~15kWh battery system in it which operates off an intermittent mains supply (via a 'total heat/total control' meter which has 3 'on' times throughout the day amounting to about 9 hours in total, 2 of which are at the whim of the supplier). Obvs, the MpIIs island the property when the mains is off.
So, I am back to the planning stage again as to whether to AC or DC-couple the array. The array is about 10m from the garage and has only relatively minor early and late in the day shading issues.
Any thoughts would be gratefully received...
