Solar in Greymouth, Hokitika and the West Coast: 2026 Guide
New Zealand's wettest region, but solar still pays. Honest yield figures from Greymouth to Westport, Westpower and Buller Electricity's 10kW export limits, and what Coasters need to know before going solar.
West Coast solar: key takeaways
- The West Coast is New Zealand's wettest region, so solar yields less: about 8,480 kWh a year from a 6.6kW system, similar to Otago.
- Cool coastal temperatures keep panels efficient, and they still generate on the region's many bright overcast days.
- At about 47.8c/kWh for grid power, a typical system saves roughly $2,840 a year and pays back in 5 to 6 years.
- Two networks serve the Coast: Westpower (Greymouth, Hokitika, south) and Buller Electricity (Westport, north), both allowing up to 10kW export.
- Best for homeowners who value energy independence: specify wind-rated, marine-grade mounting for the exposed, high-rainfall climate.
Is solar worth it in West Coast?
The West Coast is New Zealand's wettest region, so it is fair to ask whether solar makes sense here. It does, just at a more modest yield than the sunny top of the South. Hokitika averages around 1,900 hours of bright sunshine a year, similar to Otago, and a well-oriented 6.6kW system generates around 8,480 kWh annually. The Coast's cool temperatures actually help: panels run more efficiently when they are not baking, and they keep producing on the region's many bright, overcast days. With power prices near 47.8c per kWh, a typical system saves roughly $2,840 a year and pays back in around 5 to 6 years. Both West Coast networks now allow up to 10kW of solar export, so system size is rarely the limiting factor.
The Coast is served by two lines companies rather than one, so the first step is knowing which network your address sits on: Westpower covers Greymouth, Hokitika, Reefton and the south, while Buller Electricity covers Westport and the northern coast. Both are coastal and high-rainfall, so quality flashing, sealing and wind-rated, marine-grade mounting matter more here than almost anywhere in the country. For an honest look at how a lower-sun region like the West Coast still pays back, our full NZ payback breakdown walks through the assumptions behind the numbers.
Want a personalised estimate for your West Coast home? Answer a few quick questions and compare quotes from up to 3 Solar Scout-vetted installers.
How much solar will you generate in West Coast?
With 3.8 peak sun hours per day and a production factor of 0.97relative to the Auckland baseline, here's what a typical roof-mounted system generates in West Coast per year.
Savings figures assume a typical 70% self-consumption rate and use the local electricity rate of 47.8c/kWh. Your actual savings depend on roof orientation, shading, and your daily usage pattern.
For the national picture, see how West Coast stacks up against the other 15 NZ regions on annual generation per kW installed.
Electricity and buy-back rates
West Coast households pay an average of 47.8c 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 West Coast 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.
Westpower / Buller Electricity export rules
The West Coast is served by two lines companies. Westpower covers the Grey and Westland districts and the southern Buller area, including Greymouth, Hokitika, Reefton, Ross and the glacier towns. Buller Electricity covers the northern coast around Westport, from Punakaiki to Karamea. Both have adopted the national 10kW default export limit for residential solar (they were early adopters, already at 10kW ahead of the May 2026 deadline), and Buller Electricity reports no network congestion, so export is generally unconstrained. Both require an AS/NZS 4777.2:2020 compliant inverter and written approval before connection; your installer handles the distributed generation application. Check which network your address sits on, as the application form and contact differ between the two.
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 West Coast 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 West Coast
System size
6.6kW
Installed cost
$14,500
Annual generation
8,480 kWh
Annual savings
$2,840
Payback period
5.1 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 West Coast
Solar generation tracks closely with sunshine hours. Here's how West Coast's monthly sunshine hours look across the year (NIWA data).
How West Coast compares month-to-month
How West Coast compares with nearby regions
Here's how West Coast'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 West Coast
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
West Coast solar FAQs
Does solar actually work on the West Coast with all the rain?
Yes, just at a more modest yield than the sunny top of the South. The Coast is NZ's wettest region, but Hokitika still averages around 1,900 hours of bright sunshine a year, similar to Otago. A well-oriented 6.6kW system generates around 8,480 kWh annually. The cool climate helps: panels lose efficiency when they overheat, so the Coast's mild temperatures keep them near their rated output, and they keep producing on bright overcast days.
How much will a 6.6kW system generate on the West Coast?
Around 8,480 kWh a year for a well-oriented array, comparable to Otago and a little below Christchurch. Output is strongest over the drier summer months and dips through the wetter, shorter winter days. Choosing a north-facing roof plane with minimal shading matters more here than in sunnier regions, so a proper site assessment is worth it.
How much does solar cost in Greymouth or Hokitika?
A 6.6kW system on the West Coast typically costs $14,000 to $15,500 installed, at or slightly above the national midpoint. The premium reflects the region's remoteness, higher freight and travel costs, a smaller local installer pool, and the wind-rated, marine-grade mounting the coastal climate calls for. South Westland addresses (Franz Josef, Fox Glacier) and Reefton may add a travel surcharge. Get three quotes and confirm what is included.
What are the export limits for Westpower and Buller Electricity?
Both West Coast networks apply a 10kW default export limit for residential solar. They were early adopters of the national standard, already at 10kW ahead of the May 2026 deadline, and Buller Electricity reports no network congestion, so export is generally unconstrained. That means system size is rarely the limiting factor on the Coast; your roof and budget usually decide it.
How long until solar pays for itself on the West Coast?
A typical 6.6kW system (around $14,500 installed) saves roughly $2,840 a year and pays back in about 5 to 6 years. That is slower than sunny Marlborough, but still a solid return, helped by the Coast's power prices near 47.8c per kWh. Using more of your own solar during the day (running the hot water, heat pump or laundry at midday) shortens the payback.
Which network am I on, Westpower or Buller Electricity?
Westpower covers the Grey and Westland districts and the southern Buller area: Greymouth, Hokitika, Reefton, Runanga, Ross and the glacier towns. Buller Electricity covers the northern coast around Westport, from Punakaiki up to Karamea. It matters because the two have separate application forms and contacts. Your installer will confirm which network your address sits on before applying.
Is the high rainfall and wind a problem for the panels?
Not for the panels themselves, which are sealed and rated for heavy rain. What matters is the install quality: the Coast's high rainfall and exposed, windy sites make proper roof flashing, sealing and wind-rated mounting essential, and salt air near the coast means marine-grade fixings. A good installer designs for the Coast's conditions as standard, which is exactly what Solar Scout vetting checks for.
How long does a solar install take on the West Coast?
Usually 4 to 8 weeks from accepting a quote to switch-on, with 1 to 2 days of on-roof work. Allow a little extra for South Westland addresses (Franz Josef, Fox Glacier) and Reefton, where travel and scheduling can add time. Your installer handles the Westpower or Buller Electricity connection approval and any meter change.
The West Coast gets far less sun than Nelson. Does that make solar a worse deal here?
Not on the numbers, which surprises most people. A 6.6kW system on the West Coast generates about 8,480 kWh a year against roughly 9,610 kWh in Nelson, so the roof genuinely does less work. But West Coast grid power sits near 47.8c per kWh against about 38.8c in Nelson, so every unit you generate is worth more. The result is a typical annual saving of around $2,840 on the Coast versus about $2,610 in Nelson, and a payback near 5.1 years against Nelson's 5.4, even though a Coast install costs a little more at around $14,500. New Zealand's wettest region pays for itself faster than its sunniest one.
Who should think twice about solar on the West Coast?
Three situations, and we would rather say so up front. First, a heavily shaded site: at 3.8 peak sun hours the West Coast has one of the lowest solar resources of the regions we cover, so bush, hills or a neighbouring building clipping the roof costs proportionally more than the same shading would in a sunnier region. Second, a home that sits empty all day, because exported power earns less than the roughly 47.8c per kWh you avoid by using it yourself. Third, a short stay: with payback near 5.1 years, you want to be in the house long enough to collect it. If none of those apply, a north-facing Coast roof at around 8,480 kWh a year stacks up fine.
How do I apply for solar approval on the West Coast?
Your installer lodges it with whichever of the two networks covers your address: Westpower for Greymouth, Hokitika, Reefton, Ross and the glacier towns, or Buller Electricity for Westport and the coast north to Karamea. Both require written approval before the system is connected and an AS/NZS 4777.2:2020 compliant inverter, and the application needs your address and ICP number (printed on your power bill), the system size and the inverter model. The two have separate application forms and contacts, which is the main practical reason it matters which network you are on. A Coast install is usually 4 to 8 weeks from accepting a quote to switch-on, with 1 to 2 days on the roof, and South Westland and Reefton addresses can add travel time.
Want to compare
quotes?
Get matched with vetted local installers and see real quotes for your home. It’s free, with no obligation.
Compare up to 3 quotesNearby regions
View all
Solar in Nelson
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.
Read
Solar in Canterbury
Orion's 10kW export limit, NZ's most advanced smart meter rollout, and clear Canterbury skies. What homeowners in Christchurch, Rangiora and Ashburton need to know.
Read
Solar in Marlborough
Blenheim is the sunniest town in New Zealand. With Marlborough Lines' 10kW export limit and roughly 9,600 kWh a year from a typical system, the solar case here is one of the country's strongest.
Read
Solar in Auckland
Vector's 10kW dynamic export limit, 42.6c/kWh power prices, and 4.2 peak sun hours. What Auckland homeowners need to know about going solar.
Read
Join the conversation
The best comments here are honest ones: real names, real numbers and real experience. Share yours, please stay civil and on topic. No self-promo links.
Your email is never shown or shared. To change or remove a comment later, .
No comments yet. What is your experience with this? Be the first to weigh in.