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 29.2c/kWh for grid power, a typical system saves roughly $1,660 to $1,800 a year and pays back in 8.1 to 8.7 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 29.2c per kWh, a typical system saves roughly $1,660 to $1,800 a year and pays back in around 8.1 to 8.7 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 national baseline, here's what a typical roof-mounted system generates in West Coast per year.
Assumes you use 40 to 50% of what you generate and export the rest at 13c/kWh. The daily fixed charge on your bill does not go away with solar, so it is not counted as a saving. The daytime rate used here is 29.2c/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 rest of the country on annual generation per kW installed.
Electricity and buy-back rates
The daytime variable rate in West Coast averages 29.2c per kWh across the retail plans available on the local network. Every kilowatt-hour you self-consume from your panels saves you that variable rate. It does not remove the daily fixed charge, which you keep paying whatever your panels produce, so we never count it as a saving. 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's September 2026 table lists Contact's residential buy-back at 8c/kWh on selected residential plans, 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. The peak WINDOW is not published, and neither is the GST basis on Ecotricity's own page. Powerswitch also lists a flat-rate alternative at 18c/kWh for low users and 17c/kWh for standard users, which pays the same rate all day and can suit a household without a battery better than the peak plan. Confirmed against Powerswitch's September 2026 table.
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). Powerswitch's September 2026 table says MoveMaster pays 20c/kWh peak (weekdays 7 to 9am and 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. Systems up to 50kW, and you need an export-capable meter. Frank does not appear on Powerswitch's solar table, so this was confirmed on Frank's own FAQ (page updated 19 May 2026).
Buy-back conditions
Genesis Energy
Two shapes on the HomeGen plan. Time-varying pays 15c/kWh peak (7 to 9am and 5 to 9pm) and 12.5c/kWh off-peak (9am to 5pm and 9pm to 7am). Anytime pays a flat 12.5c/kWh with no window to chase, the same rate as its Frank brand. Genesis states its export rates exclude GST. Confirmed against Powerswitch's September 2026 table.
Buy-back conditions
Mercury
The Flex plan is seasonal AND time-of-use, so it has four rates, not two. Winter (1 May to 30 Sep): 20.38c/kWh peak and 15.75c/kWh off-peak. Summer (1 Oct to 30 Apr, the seven months a roof exports most): 10.44c/kWh peak and 9.17c/kWh off-peak. Peak is 7 to 11am and 5 to 9.30pm in both seasons. The ranges above span the year because no customer is ever paid a winter peak and a summer off-peak at the same time. Mercury's flat plan pays 11.1c/kWh instead. 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. Confirmed against Powerswitch's September 2026 table.
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). Exports bill at 15c and the extra 9c arrives as a separate credit; you need a communicating smart meter to get it. Other residential plans, including the EV plan, get a flat 12c. Meridian's page says rates do not include GST. Confirmed against Powerswitch's September 2026 table.
Buy-back conditions
Nova
A flat 10c/kWh all day, with no peak window to chase and no seasonal split. Sourced from Powerswitch's September 2026 table, which publishes rates excluding GST; Nova's own page does not state a basis.
Buy-back conditions
Octopus Energy
The Peaker plan (systems 20kW or less) pays 23c/kWh peak and 10c/kWh off-peak, peak being 7 to 11am and 5 to 9pm on weekdays. Octopus says on its own page that you are unlikely to make the most of the peak rate without a battery. The standard Flexi plan (10kW or less) pays 19c peak and 14c off-peak, and Free Lunch pays 17c peak and 8c off-peak. ⚠ All of these are lower on the Northpower and Top Energy networks, so Northland is not on the national numbers: Peaker is 21c/8c and Flexi 17c/12c there. Confirmed against Powerswitch's September 2026 table, which now agrees with Octopus's own page.
Buy-back conditions
Power Edge
⚠ Read the condition. Powerswitch's September 2026 table lists 17.39c/kWh with a 3-year contract, and 12.5c/kWh without one, so the headline rate costs you three years of switching freedom. Power Edge's own pages advertise different figures again (17c year-round and up to 27c in a winter peak on its homepage, 14.37c on its join page, and a 20c 'Power Shield' rate that is the same 17.39c with GST added). Ask which number applies to you, in writing, before you sign. Powerswitch publishes excluding GST.
Buy-back conditions
Powershop
13c/kWh for most of the year, lifting to 23c/kWh in the winter peak only: 7 to 11am and 5 to 9pm, Monday to Friday, during July, August and September. That is three months of weekday mornings and evenings, so a roof without a battery earns the 13c rate for the overwhelming majority of what it exports. Sourced from Powerswitch's September 2026 table, which publishes rates excluding GST.
Buy-back conditions
Pulse Energy
A flat 12c/kWh, but Powerswitch notes it varies depending on location, so confirm the figure for your address before you switch. Sourced from Powerswitch's September 2026 table, which publishes rates excluding GST.
Buy-back conditions
Toast Electric
A flat 12.5c/kWh all day, but Toast only serves four networks: Wellington Electricity, Electra, Powerco Wairarapa and Orion. If your address is outside those, this rate is not available to you at all. Sourced from Powerswitch's September 2026 table, which publishes rates excluding GST.
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
$1,660-$1,800
Payback period
8.1-8.7 yrs
After this point, the power is yours.
Assumes you use 40 to 50% of what you generate and export the rest at 13c/kWh. The daily fixed charge on your bill does not go away with solar, so it is not counted as a saving. Estimates also use the regional production factor and the local daytime variable rate. 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 a solar installer on the West Coast
Greymouth, Hokitika and Westport are serviced by a small number of local electrical firms plus installers travelling over from Christchurch or down from Nelson, so ask where the crew is based and what a callout costs before comparing quotes. The standard filters apply: SEANZ membership, EWRB-registered electricians, a written workmanship warranty of five years or more.
Two Coast checks. First, network: Greymouth and Hokitika sit on Westpower while Buller is on Buller Electricity, and the distributed generation application goes to whichever one your address is on. Second, weather exposure: with the Coast's rain and coastal salt, ask what corrosion-rated mounting and sealed cable entries the quote specifies.
Our guide to choosing a solar power installer covers SEANZ membership, the questions to ask, and the red flags to avoid, wherever in the country you are.
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 $1,660 to $1,800 a year and pays back in about 8.1 to 8.7 years. That is slower than sunny Marlborough, but still a solid return, helped by the Coast's power prices near 29.2c 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?
A slower deal, not a bad one. 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 does less work, and Coast power at about 29.2c per kWh is a touch cheaper than Nelson's 30.3c, so each unit you use at home saves slightly less too. That adds up to a typical saving of around $1,660 to $1,800 a year on the Coast against $1,930 to $2,090 in Nelson, and with a Coast install costing a little more at around $14,500, payback runs near 8.1 to 8.7 years against 6.7 to 7.3 in Nelson. It still pays for itself well within the life of the panels, and using more of your solar during the day closes some of the gap.
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 29.2c per kWh you avoid by using it yourself. Third, a short stay: with payback near 8.1 to 8.7 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.
Who installs solar panels on the West Coast?
West Coast installs are handled by a small pool of local electrical firms plus installers travelling from Christchurch or Nelson, so where the crew is based shapes both price and warranty service. Filter on SEANZ membership, EWRB-registered electricians, and a written workmanship warranty of five years or more. Confirm the installer knows whether your address is on Westpower or Buller Electricity, because the distributed generation application differs, and given the Coast's rain and salt exposure, ask what corrosion-rated hardware and sealed cable entries the quote specifies.
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