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Commercial Solar Finance UK · Independent
Cost Guide · 200kW

How much does a 200kW commercial solar system cost in 2026?

200kWp is the size where commercial solar economics start to land squarely in the "do it" zone for profitable trading companies. Hardware pricing per Wp is cleanly into the volume tier, project management costs are amortised over enough capacity, and the absolute size of FYA tax savings (~£25k year one) is large enough to materially shift cash flow. Most 200kWp projects sit £160k–£200k turnkey in 2026.

Capex range

£160,000–£200,000

£/kWp

£800–£1,000

Annual yield

190 MWh

Payback (post-FYA)

3–4 years

Cost breakdown — where the money goes on a 200kW project

L01 · 50–55%

Hardware (modules, inverters, mounting)

£90k–£110k

Volume tier kicks in — typically £0.45–£0.55/Wp on hardware. Module pricing landing on tier-1 mono-PERC at £0.18/Wp typical.

L02 · 17–18%

Installation labour (M&E, roof access)

£28k–£36k

Site days scale with kW but with volume efficiencies. Crew typically 4–6 over 2–3 weeks for 200kWp.

L03 · 11–13%

Soft costs (DNO, structural, design)

£18k–£26k

G99 connection process required (50kW threshold). DNO study £3k–£8k; reinforcement charges possible on grid-constrained sites £5k–£25k.

L04 · 3–5%

Commissioning & certification

£6k–£9k

G99 commissioning, full DNO inspection, MCS certification where SEG tariff wanted.

L05 · 15–18%

Margin and contingency

£24k–£32k

Installer margin in the 12–15% range plus 5% contingency. Larger projects can negotiate margin transparency more effectively.

Worked example: 200kW commercial solar at central pricing

Capex (central)

£180,000

Year-1 corp tax saved

£22,500 corp tax saved (50% FYA × 25%)

Year-1 electricity saving

£40k (190MWh × ~21p blended)

Year-1 net cash

-£117k (after capex, FYA, savings)

25-year lifetime IRR

14–19%

Simple payback

4–5.5 years

Run your own numbers in our interactive calculator →

Best fit

Profitable mid-market manufacturers, multi-let property portfolios with single-tenant industrial buildings, established hospitality groups with steady daytime demand, mid-sized agricultural cooperatives.

Best for

A 200kW system suits mid-market manufacturer, mid-sized warehouse, multi-unit retail estate, school or college estate, hotel chain site.

Not suitable

Loss-making businesses, sites with under 70% daytime self-consumption (consider smaller size), buildings with planned change of use within 5 years.

Other system sizes

100kW system cost

£850–£1,100 per kWp

500kW system cost

£720–£900 per kWp

1MW system cost

£700–£900 per kWp

200kW cost FAQs

Is 200kW the sweet spot for commercial solar economics?
It's where economics get unambiguous for profitable trading companies. Hardware pricing has fallen into the volume tier, the FYA absolute saving is large enough to materially shift year-one cash, and project management costs are well-amortised. IRRs typically land 14–19% range vs 12–17% at 100kW. The "sweet spot" framing is correct in that sense.
Why is the FYA more useful at 200kW than 100kW?
AIA caps year-one relief at £1m of qualifying spend. At £180k system, AIA delivers £45k of year-one tax relief (25% × £180k). FYA delivers £22.5k year one (50% × 25% × £180k) plus the residual via the special-rate pool. AIA still wins on year-one cash here. The FYA matters most where AIA is exhausted by other expenditure, or above £1m total qualifying spend.
What's the typical DNO position on a 200kW system?
G99 connection required (above the 50kW G98 threshold). Most DNOs accept 200kW commercial connections without major reinforcement on industrial estates with reasonable existing capacity. Cost £3k–£8k for the connection study and approval; reinforcement charges only triggered on grid-constrained sites. Lead time 6–12 weeks DNO-side.
Are battery storage economics good at 200kW?
Storage adds value at 200kW where time-of-use tariff exposure is meaningful (5p+ peak/off-peak differential), where DNO has limited or zero export consent, or where the site has continuous overnight demand that pre-storage solar can't serve. For typical daytime-heavy 200kW projects with 75%+ self-consumption already, storage adds modest IRR uplift but rarely justifies its capex.

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