Sponsored by sonnen
The sonnen plan setup was very interesting - and I think their options in battery sizes offer good flexibility.
Provided you don't breach your limit, it is a no-brainer. He's paying roughly what I did for the last 12 months (me $670, him $720 @ $60/month) but has a bit more capacity up his sleeve if he needs it. Of course you have to pay for the hardware yourself, which is a slightly higher outlay than mine was.
https://sonnen.com.au/sonnenflat/
As to being "halfway" to recouping costs - that might be true if the calculation was against his increased usage at a non-discounted rate, I guess. From memory, Steve got this setup about 18 months after mine landed, when Natural Solar switched gears. Tho he was spending up to $4K per annum, which is more about a bad electricity deal than anything. FIVE TVs? Jeez...
Whatever works for you I guess. Knowing the bill is $180 a quarter is nice if you've previously been paying $1K.
My Powerwall is now 5 years old and suffered mild degradation, so I'm not getting quite the oomph out of it I did at the start. It is on the smaller side these days tho, so I'm thinking an upgrade might be in order.