Commercial & Industrial Solar Canterbury: Big roofs, daytime load, industrial-scale savings
The short answer
Solar suits Canterbury manufacturing and logistics where the load runs in daylight: compressed air, process cooling, pumps and lighting on day shifts. Large flat industrial roofs are ideal, and at 250 to 500 kW the installed cost falls to $1,100 to $1,500 per kW, so a 250 kW system runs roughly $275,000 to $375,000 before the Investment Boost deduction.
Canterbury concentrates the South Island's manufacturing, food processing and logistics, and much of it runs on daytime load: compressed air, process cooling, extraction, pumps, conveyors and lighting during shift hours. Add large, flat industrial roofs and rising commercial power prices, and a system sized to your daytime demand offsets a large share of it at the per-kWh rate you pay.
We are not an installer. Involve Energy models the system against your own load, arranges the financing stack and project-manages SEANZ-certified local crews through to commissioning, so you own the asset with an independent model behind it and one point of accountability.
Match the system to the shift pattern
The honest question for a plant is when the load actually runs. A single or double day shift is a strong solar match; a continuous three-shift operation draws power around the clock, so solar covers the daytime third and the grid the rest. Either way we size against a half-hourly analysis of your real demand, not a nameplate figure, which is what the feasibility study provides.
How it works
01
Feasibility
Send twelve months of power bills, ideally half-hourly data. We model system size, generation against your actual load, self-consumption, cost, savings and payback on your numbers, not industry averages.
02
Financing
We apply the Investment Boost deduction and match the remainder to the best available green or interest-free business lending, sized so the repayment sits at or below your current bill wherever the numbers support it.
03
Installation
Certified local crews install and commission the system on your roof or on ground or carport structure alongside. We manage the lines company approval, the electrical certification and the programme around your production schedule.
04
Monitoring
Once live, we watch performance, flag anything underperforming and report your actual savings against the model, year after year.
Start with a conservative estimate below, then send a year of bills for the half-hourly version. The wider costs and payback picture is in our commercial solar guide.
The numbers
What the numbers look like
| System size | Indicative installed cost | Indicative annual saving | Indicative payback |
|---|---|---|---|
| 30 kW | $54,000 to $78,000 | $7,000 to $9,000 | 6 to 10.5 years |
| 60 kW | $98,000 to $135,000 | $14,000 to $17,000 | 5.5 to 9 years |
| 100 kW | $140,000 to $180,000 | $23,000 to $29,000 | 4.5 to 7 years |
| 250 kW | $275,000 to $375,000 | $59,000 to $72,000 | 3.5 to 6 years |
Your numbers
Start from the example. Put in yours.
Your farm or business
Your indicative numbers
Conservative, ex GST, modelled not promised
Measure
- Power used
- 376,471 kWh a year
- Your spend at 25.5c a kWh ex GST, the national commercial average.
- Power bill
- $96,000 a year
Design
- System
- 155 kW
- Sized to your daytime load.
- Generates
- 203,050 kWh a year
- Used on site
- 80%
- The rest exports at 8c a kWh.
- Installed cost
- $199,950 to $261,950
- Confirmed with certified installers.
Finance
- Investment Boost, year one
- about $12,933
- A 20% immediate tax deduction, worth this in cash at the 28% company rate. Not a discount.
- Bank green business loans
- $2,257 a month
- 1.0% for 3 years, on the first $80,000; the remainder is financed separately, and the full stack is part of the feasibility study.
- Estimated saving
- $3,377 a month
- Mid estimate, set against the repayment while the loan runs.
Outcome
- Saving
- $36,387 to $44,671 a year
- Payback
- 4 to 7 years
- Net of the Investment Boost benefit.
- Emissions avoided
- 12.0 t CO₂e a year
- Asset life
- 25+ years
- Panels keep producing long after payback.
How this is modelled (assumptions v2026-10-v7)
- Power valued at $0.20 to $0.26/kWh ex GST (savings are never valued at the top of the commercial tariff range).
- Export credited at $0.08/kWh, the conservative end of current buy-back rates.
- Installed cost interpolated from 30 kW ($1,800 to $2,600/kW) down to 500 kW ($1,100 to $1,500/kW), 2025/26 working ranges.
- Canterbury yield modelled at 1310 kWh per kW per year.
- Self-consumption capped by your daytime usage profile and held below typical vendor claims; sizing targets 90 percent of daytime load.
- Investment Boost stated as the year-one cash value of the 20 percent immediate deduction at the 28 percent company rate. It is a tax timing benefit, not a discount.
- No power price escalation and no panel degradation in simple payback; omitting escalation outweighs degradation, so the net effect is conservative.
Indicative only; not financial or tax advice. The feasibility study models your site from twelve months of actual bills.
Next step
Get these numbers checked properly
The real model is built from twelve months of your bills. Send your details and we will do it for you; we reply within one working day, no obligation.
Straight answers
The questions we get asked
Does solar suit a manufacturing site?
Where the load is in daylight, yes. Single or double day-shift operations, compressed air, process cooling, extraction, pumps and lighting all run while the sun is up, so a system sized to that daytime demand self-consumes most of its generation. Continuous three-shift plants are a different profile; a half-hourly analysis tells us which you are.
Why Canterbury for commercial and industrial solar?
Canterbury concentrates the South Island's manufacturing, food processing and logistics, alongside good sunshine (a modelled 1,310 kWh per kW a year) and rising commercial power prices. Large, flat industrial and warehouse roofs are ideal mounting surfaces, and the daytime load profile of most plants matches generation well.
Is our roof suitable?
Large industrial and warehouse roofs are usually excellent: flat or low-pitch steel with clear spans and a big area. We check condition, orientation and structural capacity as part of the study, and where the roof is not right, ground-mount or carport-mount options can work. The feasibility study confirms it before you commit.
What does an industrial-scale system cost?
The per-kW cost falls with size: around $1,100 to $1,500 per kW at 250 to 500 kW, so a 250 kW system runs roughly $275,000 to $375,000 installed at 2026 pricing. The Investment Boost deduction returns about 5.6 percent of the cost in year-one tax cash for a company taxpayer, and green business lending can carry the capital.
See your plant's numbers before you commit
Send a recent power bill and we will model system size, cost, savings and payback against your actual daytime load. Independent, no obligation, yours to keep.