New build, South Australia.

[Nofxguy]

Howdy, this is my first post in relation to the Fox brand and solar/batteries in general. We dont currently have solar or batteries so its all pretty new to me.

Our builder in Adelaide, South Australia has advised he is using Fox ESS products for our new build, Eco 8 star energy rated townhouse. We are building off the plan and the house package already includes solar and batteries in the fixed cost. We paid a small fee to upsize the solar from 6.6kw to 8.8kw which we went with. (Its as much as we could go due to roof size)

I'm working out a few specs on the house and i'm trying to work out if its worth upsizing the included Fox ESS battery. Plus, what the best setup or brand EV 'charger' works well with Fox to take advantage of excess solar EV charging.

From what I understand:
The house is already connected to the mains grid with a 3 phase supply.
The consumer board will be connected to the grid as 3 phase, the house itself will be supplied on a single phase from the consumer board onwards.
We will have an 8.8kw solar array, North facing, unshaded roof.
A Fox ESS H1 single phase hybrid inverter.
We will have a 3 phase power supply/connection pre-wired on its own circuit, with an isolation switch in the garage for a 22kw EV power supply shortly after moving in.
Builder has advised he is installing a Fox ESS EP11.

Trying to work out if its worth paying extra to install a second ESS EP11. The price should be fairly low as the Australian Govt. is currently offering a 30% rebate on new home battery installs which is a decent discount.

We currently only use about 11kwh per day in a small house, that will increase in the new house as its significantly larger. I almost feel like its a no brainer to upsize and double the batteries and install two EP11's?

Then i'm wondering, what EV charger works well with Fox from the Community experience. Has anyone had any experience with Fox EV chargers, specifically the Fox A Series 3 phase EV 22kw Chargers? (A022K)

Ideally we we want to run the house, charge batteries and on high output days charge the EV or divert from Solar to the EV instead of the battery.

[Will]

I would personally install a fox 3-phase inverter and spec out a large enough inverter to cover the unbalanced loads.
If you install a single-phase inverter like the H1 you will only be able to cover the load on that one phase which, if all your home loads are off a single phase, might be fine but I can't help but feel that having energy monitoring on all three phases would be a bonus.

On the battery front, I always recommend going as large as you can budget for, taking the ROI into consideration.
You won't be disappointed with doubling up on the EP battery. You'll still have growing room as the EP can scale to 4 units in future if needed.

On the charger front, I wouldn't obsess about buying a fox charger, nearly all ev chargers support solar export sensing and will charge from surplus solar.