I live in Canberra Australia and have received three solar power quotes. Initially I was looking at buying a battery however one supplier advised that due to the costs of the batteries and the current poor return on investment they recommend getting a larger system 10kW which would be cheaper to install and you can sell back the additional kW to the grid.
In Canberra a single phase home (which is what I have) can only sell 5kW back to the grid.
Quotes for 6.5kW system with battery are approx. $20,000
Quotes for 10kW system no battery $10,000 - $12,000
The supplier who recommended larger system no battery advised that I could save up to $1900 per year where as with the battery it would only be $1400 noting that the pay in tariff could change (currently its around 12-13c per kW)
I am now super confused - ideally it makes sense to go the larger system without the battery and sell back what we can as the option is around $10,000 cheaper and we can always add a battery once prices drop but I’m not sure that is the best option as only one of the three suppliers recommended it to me and the pay in tariff could reduce.
Any advice is welcome.