Solar Panel Installation in Nelson Region

Very little: occasional cleaning where rain doesn't do the job (dusty climates, low tilt angles, bird traffic), an electrical inspection every few years, and monitoring app checks for output drops. A sudden generation drop usually means an inverter fault or new shading, not dirty panels.

Size to your daytime consumption and roof space: pull a year of electricity bills, and let the installer model self-consumption vs export. Typical homes land between 4kW and 10kW. Oversizing slightly is usually cheap at install time and future-proofs for an EV or heat pump.

Not to benefit — grid-tied solar without a battery is the fastest-payback configuration in most markets. Batteries add backup power and evening self-consumption but often double system cost. Decide battery separately on outage frequency and your tariff structure.

It exports to the grid under your market's scheme — net metering, feed-in tariff, or export payments. Export rates are usually well below retail import rates, which is why maximising self-consumption (timers, smart appliances, EV charging) beats chasing export credits.

Panels carry 25-30 year performance warranties (typically 85%+ output at year 25). Inverters are the consumable — expect one replacement around years 10-15. Quality mounting and cabling should match panel life; that's where cheap installs cut corners invisibly.

Increasingly yes — rising retail power prices and falling hardware costs put well-sited systems at 7-10 year paybacks, best with high daytime self-consumption. Shop export rates: some retailers pay meaningfully more per exported kWh than others.