Solar in Nelson and Richmond: Complete Guide for 2026
New Zealand's sunniest region, Network Tasman's 10kW export limit, and roughly 9,600 kWh a year from a typical system. What homeowners in Nelson, Richmond and the wider Tasman district need to know about going solar.
Nelson solar: key takeaways
- Nelson is New Zealand's sunniest region, averaging around 2,497 hours of bright sunshine a year.
- A typical 6.6kW system generates about 9,600 kWh a year, more than the same system in Auckland or Christchurch.
- At about 38.8c/kWh for grid power, a typical system saves roughly $2,610 a year and pays back in 5 to 6 years.
- Network Tasman allows up to 10kW of solar export, so most family homes connect without a special cap.
- Best for sun-rich coastal homes: budget marine-grade mounting within a few kilometres of the sea.
Is solar worth it in Nelson?
Nelson is New Zealand's sunniest region, recording around 2,500 hours of bright sunshine a year, level with neighbouring Marlborough and well ahead of the rest of the South Island. That sunshine, combined with cool coastal temperatures that keep panels running efficiently, means a typical 6.6kW system here generates around 9,600 kWh a year, more than the same system produces in Auckland or Christchurch. Nelson households pay about 38.8c per kWh for grid power, so a typical system saves roughly $2,610 a year and pays back in about 5 to 6 years. Network Tasman, the region's electricity distributor, now allows up to 10kW of solar export in line with the national standard introduced in May 2026, which makes it easy to size a system for a whole family home.
One local point to plan for: many Nelson homes sit close to the water, around Tahunanui, the Haven and the Stoke waterfront, where salt air makes marine-grade stainless mounting and connectors worth specifying. Away from the coast, Nelson sits in a standard wind zone with no snow loading to design for at sea level, so mounting stays straightforward and install pricing is competitive with the rest of the South Island. For how Nelson's sunshine advantage stacks up against the main centres, our full NZ payback breakdown puts the region's fast payback in national context.
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How much solar will you generate in Nelson?
With 4.4 peak sun hours per day and a production factor of 1.10relative to the Auckland baseline, here's what a typical roof-mounted system generates in Nelson per year.
Savings figures assume a typical 70% self-consumption rate and use the local electricity rate of 38.8c/kWh. Your actual savings depend on roof orientation, shading, and your daily usage pattern.
For the national picture, see how Nelson stacks up against the other 15 NZ regions on annual generation per kW installed.
Electricity and buy-back rates
Nelson households pay an average of 38.8c per kWh for grid power (MBIE QSDEP, latest survey). Every kilowatt-hour you self-consume from your panels saves you that full retail rate. Excess generation flows back to the grid, and your retailer pays you a buy-back rate. Retailers set those rates nationally rather than by region, so the figures below apply in Nelson the same as anywhere else. Each card shows the headline rate and the rate you earn outside the peak windows, because for a household without a battery the second number is the one that does most of the work.
Buy-back conditions
Contact Energy
Contact publishes the Good Charge peak window (7am to 9am and 6pm to 10pm weekdays, for battery-and-solar customers) but not the peak rate: it prices by address, so there is no national figure to print, and your export rate is set when you register your solar. Powerswitch lists Contact's residential buy-back at 8c/kWh, the lowest here. So the 25c peak quoted all over the internet is a national number for a retailer that does not have one.
Buy-back conditions
Ecotricity
ecoSOLAR pays 21c/kWh peak and 16c/kWh off-peak on Ecotricity's own page. The peak WINDOW is not published, and neither is the GST basis. The off-peak rate is the strongest here, which matters more than the headline for a household without a battery.
Buy-back conditions
Electric Kiwi
Sources disagree and we will not pick one. Electric Kiwi's own solar page advertises a 23c/kWh buy-back and quotes 11.5c/kWh off-peak (incl GST). Its Powerswitch profile says MoveMaster pays 20c/kWh peak (weekdays 7 to 9am, 5 to 9pm) and 10c/kWh off-peak, and that the Everyday and GO250 plans pay 8c/kWh. Ask for the number in writing before you switch.
Buy-back conditions
Frank Energy
Flat 12.5c/kWh, and Frank's own FAQ says the credit is shown before GST. If you are not GST-registered you are not making a taxable supply, so 12.5c is what lands on the bill: the 15% is added only for GST-registered customers, via a buyer-created tax invoice.
Buy-back conditions
Genesis Energy
Genesis's Powerswitch profile states a flat 12.5c/kWh excluding GST for home and business connections, the same rate as its Frank brand. Paid at one rate all day: no peak window to chase.
Buy-back conditions
Mercury
Two plans. The flat plan pays 11.1c/kWh. The Flex plan is seasonal AND time-of-use: winter (1 May to 30 Sep) 20.38c peak and 15.75c off-peak; summer (1 Oct to 30 Apr, the seven months a roof exports most) 10.44c peak and 9.17c off-peak. Peak is 7 to 11am and 5 to 9.30pm. The 9.17c shown here is the rate that applies for most of the hours a roof actually exports. Rates exclude GST. A further 6.9c/kWh for two years is available if you install through one particular installer: that is an installer arrangement, not a plan rate, and it is deliberately not folded into the rate above.
Buy-back conditions
Meridian Energy
15c/kWh year-round on the open-term Freedom and Night Saver plans, lifting to 24c/kWh in the winter peak windows only (7 to 10am and 5 to 9pm, July to September, weekdays). Exports bill at 15c and the extra 9c arrives as a separate credit; you need a communicating smart meter to get it. Fixed-term plans, including EV, get a flat 12c. Meridian's page says rates do not include GST.
Buy-back conditions
Octopus Energy
The Peaker plan pays 23c/kWh peak and 10c/kWh off-peak (peak: 7 to 11am and 5 to 9pm, weekdays). Octopus says on its own page that you are unlikely to make the most of the peak rate without a battery. The standard OctopusFlexi plan is 19c peak and 14c off-peak. Both are lower on the Northpower and Top Energy networks (Peaker 21c/8c, Flexi 17c/12c), so these are not national numbers. Powerswitch lists Flexi as a flat 17c: the two sources disagree and we have used Octopus's own page.
Self-consumption is the bigger saving: every kWh you use yourself is worth 2 to 3 times more than every kWh you export. For the full national retailer comparison, see our buy-back rates guide.
Network Tasman export rules
Network Tasman is the sole electricity distributor for Nelson and the wider Tasman district following its April 2026 merger with the former Nelson Electricity network, which covered central Nelson city. It applies a 10kW default export limit for residential solar, in line with the national standard introduced in May 2026, so most family-sized systems connect without a special export cap. The limit is capacity-dependent rather than a hard guarantee: a handful of local substations (in areas such as Mahana, Riwaka and Redwood Valley) have reached their solar hosting capacity, where export can be curtailed or a flexible limit applied until the network is upgraded. There is no application fee for a residential solar connection, and your installer submits the distributed generation paperwork to Network Tasman before switch-on. Inverters must comply with AS/NZS 4777.2:2020.
For the full step-by-step from accepting a quote to switch-on, see our NZ solar installation process guide.
Typical system economics
Below is what a typical 6.6kW system looks like in Nelson from a financial perspective. Real numbers will vary with installer, brand, and roof complexity. For the full national pricing context, our NZ solar installed-cost guide shows what 6.6kW jobs typically include and how to spot a fair quote.
What you can expect in Nelson
System size
6.6kW
Installed cost
$14,000
Annual generation
9,610 kWh
Annual savings
$2,610
Payback period
5.4 yrs
After this point, the power is yours.
Estimates based on the regional production factor, average local electricity rate, and a typical 70% self-consumption profile. Your actual savings will vary with your roof, usage pattern, and retailer.
Sunshine by month in Nelson
Solar generation tracks closely with sunshine hours. Here's how Nelson's monthly sunshine hours look across the year (NIWA data).
How Nelson compares month-to-month
How Nelson compares with nearby regions
Here's how Nelson's solar numbers stack up against its neighbouring regions, on annual sunshine, typical output from a 6.6kW system, local power price, and payback period.
Choosing the right installer matters more than choosing a panel brand. Workmanship quality, paperwork handling, and how a company services warranty claims drive most of the long-term experience. Our guide to choosing a solar installer in NZ covers SEANZ membership, the questions to ask, and the red flags to avoid.
Solar Scout-vetted solar installers serving Nelson
Every installer in the Solar Scout network is independently vetted. We connect you with up to 3 operating in your area so you can compare quotes on price and fit, never an open auction.
- EWRB registration: Licensed to do electrical work in New Zealand
- Positive customer experiences and real references: Read and checked before they can quote you
- SEANZ or Master Electricians: Backed by an industry body
- 5 years of solar: Solar-specific experience, not just general sparky work
Nelson solar FAQs
Is Nelson really New Zealand's sunniest region?
Yes. Nelson averages around 2,500 hours of bright sunshine a year (NIWA's long-run normal is about 2,497 hours), which puts it at the top of the national table alongside Blenheim in Marlborough. That is well ahead of Christchurch (about 2,000 hours) and Dunedin (about 1,800). More sunshine means more generation: a 6.6kW system in Nelson produces around 9,600 kWh a year, comfortably more than the same system in Auckland or Christchurch.
How much does solar cost in Nelson?
A 6.6kW system in Nelson typically costs $13,000 to $15,000 fully installed, including panels, inverter, mounting, wiring and the connection paperwork. There is no big regional loading here: Nelson sits in a standard wind zone with no snow rating at sea level, so mounting stays straightforward, and the region is well served by local installers. Homes within a few kilometres of the coast should budget a small premium for marine-grade fixings. Always get three quotes.
What is Network Tasman's solar export limit?
Network Tasman applies a 10kW default export limit for residential solar, in line with the national standard that took effect in May 2026, so most family homes connect without a special cap. It is capacity-dependent rather than a hard guarantee: a small number of local substations have reached their solar hosting capacity, where export may be curtailed or a flexible limit applied until the network is upgraded. Your installer checks your address and handles the connection application.
How much will a 6.6kW system generate in Nelson?
Around 9,600 kWh a year, thanks to Nelson's high sunshine and cool coastal air, which keeps panels running efficiently. Output peaks over summer (December to February) and dips through the shorter winter days, but Nelson's bright, settled climate means the shoulder seasons still generate strongly.
How long until solar pays for itself in Nelson?
A typical 6.6kW system (around $14,000 installed) saves roughly $2,610 a year through a mix of self-consumption and export, paying back in about 5 to 6 years. The combination of NZ's best sunshine and low South Island install pricing makes Nelson one of the strongest-value solar markets in the country. The more of your own solar you use during the day, the faster it pays back.
I live near the water in Tahunanui or Stoke. Does salt air affect my panels?
It affects the mounting hardware, not the panels' output. Within a few kilometres of the coast, specify marine-grade (316 stainless) racking, fasteners and connectors, and tier-one panels with strong frame warranties. It is a small premium that protects the system for decades. Every Solar Scout-vetted installer will spec coastal-rated components for waterfront Nelson and Stoke homes.
What happened to Nelson Electricity?
Nelson Electricity, the small network that used to cover central Nelson city, merged into Network Tasman in April 2026. Network Tasman is now the single distributor for the whole region, running one distributed generation process for both the city and the wider Tasman district. If you had a connection with Nelson Electricity, it simply carries over to Network Tasman.
How long does a solar install take in Nelson?
From accepting a quote to switch-on, expect around 4 to 8 weeks. The on-roof work itself is usually 1 to 2 days. The longer part is the paperwork: Network Tasman's distributed generation approval and any meter change your retailer needs to make. Your installer manages both.
Nelson gets nearly as much sun as Blenheim. Why is the payback longer?
Because Nelson's power is cheaper, not because the roof does less work. A 6.6kW system generates about 9,610 kWh a year in both Nelson and Marlborough, but Nelson households pay around 38.8c per kWh for grid power against about 47.0c in Marlborough. Every unit of solar you use replaces a cheaper unit here, so identical generation is worth less off the bill: roughly $2,610 a year in Nelson against $3,160 in Marlborough. Add Nelson's typical $14,000 install cost and payback lands near 5.4 years rather than 4.5. Cheap power is good news for your monthly bill and slower news for your payback, and it is worth knowing before you compare the two regions.
What do I actually get paid for the solar I export in Nelson?
That depends entirely on your retailer and your plan, and it is always worth less than using the power at home. Every unit you use as it is generated avoids buying a unit at about 38.8c per kWh, which is the Nelson average. Every unit you send to the grid earns your retailer's buy-back rate instead, which is lower, differs from retailer to retailer, can change when you switch plan, and on some plans varies by time of day. Our buy-back rates guide carries the current national comparison. The practical takeaway for a Nelson home is simple: shift the dishwasher, the laundry, the hot water and any EV charging into the middle of the day.
Is solar different in Richmond and Tasman compared with Nelson city?
The sunshine is effectively the same, and since April 2026 so is the network. Network Tasman is now the single distributor for Nelson city, Richmond and the wider Tasman district, after the former Nelson Electricity network merged into it, so one distributed generation process covers the lot and the 10kW default export limit applies across the region. A 6.6kW system makes around 9,610 kWh a year whether it sits in Stoke, Richmond or Atawhai. Two local differences are worth knowing: homes within a few kilometres of the water at Tahunanui, the Haven or the Stoke waterfront should specify marine-grade fixings, and a handful of Tasman substations, in areas such as Mahana, Riwaka and Redwood Valley, have reached their solar hosting capacity, where export can be curtailed until the network is upgraded.
How do I apply to connect solar to Network Tasman?
Your installer lodges the distributed generation application with Network Tasman and waits for it to be processed before switch-on. There is no application fee for a residential solar connection. What the application needs is your address and ICP number (printed on your power bill), the system size, and an inverter model that complies with AS/NZS 4777.2:2020. Network Tasman also checks whether your local substation still has solar hosting capacity available, which is why the answer is address-specific rather than a blanket yes. Budget around 4 to 8 weeks from accepting a quote to switch-on: the on-roof work is 1 to 2 days, and the paperwork, including any meter change your retailer needs to make, is the longer part.
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