Comment by mbesto

That's fair.

Better comparison:

Author's config:

3x Powerwalls + inverters = 40 kWh

4.2 kW array

£39,360 = $53k USD

Alternative:

EG4 18kPV Hybrid Inverter = $5000

3x RIUXU = $9600

10x Trina Solar 435w panels = $1580

Cabling, installations, etc. = $5000

Total = $21k

It's not even close...