Reference library
Technical guides
Incentive mechanics, connection rules, sizing methods and procurement arithmetic for solar and battery systems in New South Wales. Written to be checked, not to be believed.
Battery rebates in NSW: how the federal discount and the PDRS incentive actually stack
Two schemes, two certificate types, one install. The full calculation for both, including what changed on 1 May and 1 July 2026.
The solar “rebate” is not a rebate: how your STC discount is really calculated
The three-variable formula, the zone rating, the shrinking deeming period — and how to audit any quote in ninety seconds.
Commercial solar payback in NSW: modelling it so the number survives contact with the bill
Self-consumption ratio, demand charges, the 99 kW threshold, and the shortcut that makes most proposals optimistic.
How to size a home battery in NSW without guessing
Your evening load is the input, not your roof or your rebate. Where to find it and what to do with it.
Export limits and DNSP connection rules in NSW
Ausgrid, Endeavour and Essential: what they will approve, why limits exist, and what to do when you are constrained.
Higher wattage panels are not automatically cheaper
Panel count drives rail, kits, penetrations and labour. The installed cost-per-watt method, worked through.
How these are maintained
Scheme rules in this sector change frequently and often mid-year. Each guide carries a revision number, an issue date and a source list. When a rule changes materially, we revise the guide and increment the revision rather than silently editing it.
If you find something out of date or wrong, tell us — info@setsolar.com.au. Corrections are published, not buried.
Want this checked against your actual site?
Send us your latest bill, a photo of your switchboard and your roof plan. We will tell you what the numbers look like for your property — including where the answer is “not yet”.