I have just ordered and paid a deposit for a Tesla Powerwall 2, I would been keen to hear from other NZ owners.
Telsa are sending someone round to do a quote in January. It is expected to cost $13K to $14K installed. The deposit is refundable.
My place in Christchurch has a PV system with 15 x 270 Watt panels with Enphase M215 micro inverters. I have 3 phase power, so there is only 5 panels per phase. I often export on 2 phases and import on the other! This makes my system very inefficient, hopefully the battery will help with this.
Like most people I really only have excess supply in the summer. The aim is to top up the battery with cheaper night-rate power at other times.
Solar without a battery you are limited to power retailers who support buy-back. Once the battery is installed I can look to switch to a retailer like Flick which should help reduce my bill even further.
How have you found your Powerwall? Any tips? What was the impact to your monthly bill?
I'm a Tesla Powerwall 1 user. This system was installed in May of this year with a SolarEdge inverter.
I already had 18 x 270 watt solar panels with a SolarCloud inverter and this was installed in March 2015.
The additional of the Tesla battery means that I have two inverters, while each inverter does its own thing for its chosen installation. The 2nd inverter 'knows' about the 1st installation and can report on both, it also knows what generated power is used or exported.
When the battery was installed, I had a tiny portion of the house wiring re-routed so that it would carry on working during the rare power outage. I don't believe there's enough capacity in the batteries to last longer than a couple of hours and that's limited to the house lights, the water pump and my mancave.
As for the impact on my yearly electricity costs, I would say that they have reduced by as much as 30% each year.... I estimate that I should get to break-even by 2025.