Sizing, Net Billing & Installation
Size the system to your bill, not to your roof. Under net billing your exported units earn roughly Rs 11/kWh against the Rs 23.57–48 you pay to buy, so self-consumption and storage now beat export. These guides cover the DISCO application, kW-by-kW system costs, the 40-point install checklist, solar appliances, and agricultural pumping.
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- Distributed Generation Application NZ: Lines Company Solar Guide
How to apply for distributed generation (DG) with New Zealand lines companies. Part 6 rules, ICP numbers, 10kW export limits, and inverter approvals.
Updated 17 Sept 2026 - Off-Grid Solar System Sizing NZ: Battery Capacity & Winter Math
How to size an off-grid solar system in NZ. Sizing formulas, the 69% seasonal winter drop, battery autonomy calculations, and generator integration.
Updated 17 Sept 2026 - Solar Export Limits NZ: 10kW Code Rules & Dynamic Export
New Zealand 10kW solar export limits explained. Part 6 Code rules, Vector dynamic connections, CSIP inverter settings, and distributor policies.
Updated 17 Sept 2026 - Solar Hot Water vs Solar PV with Diverter NZ: 2026 Comparison
Solar thermal vs solar PV with a cylinder diverter in NZ. Compare $7,000-$9,000 thermal costs, 18-month diverter payback, EECA data, and heat pumps.
Updated 17 Sept 2026 - Solar Panel Installation Process NZ: Timelines, Steps & Rules
Complete guide to residential solar installation in NZ. Learn timelines, 1-2 day roof install, EWRB compliance, inspector RoI sign-off, and smart meter swap.
Updated 17 Sept 2026 - Solar Panel Roof Mounting NZ: Wind Zones, Racking & Coastal Standards
Solar panel mounting in NZ wind zones. Learn 225 km/h tolerances, uplift physics, racking failure points, 4000 Pa ratings, and coastal salt mist standards.
Updated 17 Sept 2026 - Solar System Sizing NZ: Maximising Self-Consumption Economics
How to size a residential solar system in NZ for maximum ROI. Compare 5kW vs 10kW yields, self-consumption savings (37c-45c), and diminishing returns.
Updated 17 Sept 2026
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New to this? Read these three, in order.
- Distributed Generation Application NZ: Lines Company Solar Guide
How to apply for distributed generation (DG) with New Zealand lines companies. Part 6 rules, ICP numbers, 10kW export limits, and inverter approvals.
- Off-Grid Solar System Sizing NZ: Battery Capacity & Winter Math
How to size an off-grid solar system in NZ. Sizing formulas, the 69% seasonal winter drop, battery autonomy calculations, and generator integration.
- Solar Export Limits NZ: 10kW Code Rules & Dynamic Export
New Zealand 10kW solar export limits explained. Part 6 Code rules, Vector dynamic connections, CSIP inverter settings, and distributor policies.