1 MW Utility-Scale Solar Plant Cost Breakdown (Q3 2026 China Supplier Pricing)
1 MW Utility-Scale Solar Plant Cost Breakdown (Q3 2026 China Supplier Pricing) — itemized bill of materials and FOB pricing for a typical configuration.
Estimated total (FOB): $158,880
Bill of materials
| Item | Specification | Qty | Price (USD) |
|---|---|---|---|
| PCS (Power Conversion System) | 500kW | 1 | $22,500 |
| LiFePO4 Battery Cluster | 768V 1200kWh 240S6P / 95% DoD / ~6,000 cycles | 1 | $114,000 |
| BMS | cluster-level active | 1 | $15,000 |
| ESS Prefab Enclosure | QDTB enclosure | 1 | $3,000 |
| Fire Suppression | 3-level Novec1230 | 1 | $1,500 |
| EMS / Monitoring | peak-shaving | 1 | $2,000 |
| AC Cable | YJV 4x50 | 40 | $880 |
Single-line diagram
How it was calculated
- ['Storage power', '1000kW x 0.6 = 600 kW (PCS 500kW)']
- ['Storage capacity', 'max(500kWx2h, 500kWhx0.3) = 1200 kWh (240S6P)']
- ['Battery life', '~6,000 cycles @ 95% DoD']
- ['Duration', '~ 2.4 h']
- ['Storage arbitrage (illustrative)', 'usable 1,140 kWh/day × spread $0.060/kWh × 365 = $24,966/yr']
- ['Payback / IRR', '6.8 yr · IRR 7.7% (indicative, 10-yr life)']
What drives the cost
- Equipment — the transformer/switchgear/inverter is the largest single line item.
- Storage (where applicable) — batteries are the biggest swing factor.
- Copper & freight — copper-linked cabling and freight shift landed cost ±5–10%.
Frequently asked questions
What is the difference between P50, P75 and P90 solar yield?
P50, P75 and P90 are exceedance-probability energy estimates accounting for interannual weather variability. P50 is the median year (50% chance of exceeding), P90 is exceeded in 90% of years and is the conservative 'bankable' value lenders require. With a typical interannual CV of 4-6%, P90 is roughly 7-10% below P50. The calculator reports all three plus LCOE.
How is LCOE calculated for a solar system?
LCOE divides lifetime discounted costs (capex, O&M, WACC financing, inverter replacement, module degradation) by lifetime discounted energy. The calculator uses a full-cost model: 25-year life, 0.5%/yr module degradation, WACC around 6-8%, and O&M about 1-1.5% of capex yearly. A 200 kW C&I system in a 4.5 sun-hour site typically lands near $0.04-0.06/kWh.
What tilt angle maximizes annual PV yield?
For a fixed-tilt array, annual yield is near-optimal when tilt equals the site latitude, typically latitude minus 5-15 degrees in low latitudes to favour summer load, or latitude plus 10-15 degrees for winter-heavy or off-grid loads. At 30 deg latitude the optimum is roughly 25-35 degrees. The calculator's yield model accounts for tilt, azimuth and local irradiation.
How many kWh per year does a 100 kW solar system generate?
Annual energy is roughly system kW x peak-sun-hours x performance ratio. A 100 kW array in a 4.5 sun-hour region with a PR of 0.78-0.82 yields about 100 x 4.5 x 365 x 0.80 = 131,000 kWh/yr. In sunnier regions (5.5-6 sun-hours) the same plant reaches 160,000-175,000 kWh/yr. The calculator computes P50/P75/P90 from these inputs.
What battery capacity do I need for night-time backup?
Battery capacity = daily night-time load kWh divided by depth of discharge, times autonomy days. For a 40 kWh nightly load with lithium at 80% DoD and one-day autonomy you need about 50 kWh. Add 15-20% for round-trip losses (AC-coupled ~85-90% efficiency). The configurator sizes the bank, matching PCS and cell chemistry automatically.
Off-grid vs grid-tie — which solar configuration is cheaper?
Grid-tie is 30-50% cheaper because it omits batteries and the backup inverter. A 10 kW grid-tie system runs roughly $8,000-12,000 FOB, while an equivalent off-grid system with 20-30 kWh storage and a hybrid inverter costs $18,000-28,000. Off-grid makes sense only where grid connection is absent or very expensive; the calculator prices both scenarios.
Size your own configuration
Run the calculator for your exact load and get a full BOM + FOB price.
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