Solar strategy & delivery, Aotearoa New Zealand

Clean power, engineered to last.

Watthaus runs the full chain — land, design, consents and CEC-certified installation — so an enquiry becomes a booked site visit, not a cold lead.

Get your instant estimate See how it works
CEC-certified crews Free site assessment Nationwide NZ

(01) The approach

Most solar enquiries die between the form and the site visit. We close that gap.

One team carries the project from first conversation to signed-off, grid-connected system — so nothing stalls waiting on a handover.

Land Acquisition Residential Commercial & Utility Finance & Partnerships CEC-Certified Install

(02) Get your estimate

What would solar actually save you?

Three quick questions and an honest, numbered answer — not a "request a callback" form.

01 Property
02 Roof
03 Usage
04 Estimate
05 Book visit

Where's the property?

What's the roof working with?

No battery — grid export only

Roughly what's the power bill?

$240

Your Watthaus estimate

System size—kW, roof-mounted
Annual savings—vs. grid-only power
Payback period—years to break even
10-yr net benefit—after install cost

Estimated installed cost — · CO₂ avoided —/yr. Ballpark only — your exact number is confirmed on a free site assessment.

Like what you see? Lock in a free site visit and we'll turn this into a signed-off design.

Book your free site assessment

You're in the queue, there.

A Watthaus specialist will confirm your site visit within one business day, using the numbers from this estimate as the starting design brief.

(03) What we do

Wider than most installers, by design.

Strategic partnerships mean Watthaus can take a project from bare land to switched-on — or just the roof in front of you.

Land & site acquisition

Sourcing, assessing and securing sites for solar development — from first conversation to signed agreement.

01 · Full chain

Residential solar

Rooftop systems sized to real usage data, not a generic package.

02

Commercial & utility scale

Larger arrays and grid-scale delivery, structured for the business case.

03

Strategic partnerships & finance

Landowner, iwi and investor relationships that get projects funded and built.

04

CEC-certified installation

Certified crews, full commissioning and compliance sign-off on every job.

05
3.6–4.3Peak sun hours/day, by region
CECCertified crews on every install
2-IslandNationwide project coverage
FreeSite assessment, no obligation

(04) Where this shows up

The kind of projects we take on.

Representative project types across the regions we work in — your estimate above is the same math, tuned to your roof.

Residential ↗

Rooftop retrofit

Bay of Plenty
Land & utility ↗

Site development

Canterbury
Commercial ↗

Commercial rooftop

Auckland

(05) How it works

Three calls, not twelve.

01

Inquire

Run the estimate above — two minutes, no call required to get a real number.

02

Site visit

A specialist confirms roof condition, shading and switchboard capacity on-site.

03

Book the install

Design, consents and a CEC-certified crew carry it to a signed-off connection.

(06) Why homeowners switch

No guesswork, no twelve-week wait for a number.

Real numbers before anyone calls

The estimate above runs on your own usage and roof, not a brochure average.

One team, start to finish

Land, design, consents and the certified install sit under one roof — ours.

Priced for NZ power bills

Sized against your actual spend and region's sun hours, not a template system.

(07) Coverage

One spine, Cape Reinga to Bluff.

Peak sun hours shift by region — the estimate already accounts for it.

Auckland
3.9 hrs/day
Hawke's Bay
4.2 hrs/day
Wellington
3.7 hrs/day
Nelson Tasman
4.3 hrs/day
Canterbury
4.1 hrs/day
Queenstown Lakes
4.0 hrs/day
Otago
3.6 hrs/day
Bay of Plenty
4.0 hrs/day

Ready when you are

Let's get your roof a real number.

Get your instant estimate Talk to Watthaus