500 kW PV + Storage + EV Charging System Cost Breakdown (Q3 2026 China Supplier Pricing)
500 kW PV + Storage + EV Charging System Cost Breakdown (Q3 2026 China Supplier Pricing) — itemized bill of materials and FOB pricing for a typical configuration.
Estimated total (FOB): POA
Bill of materials
| Item | Specification | Qty | Price (USD) |
|---|---|---|---|
| PV modules | 500 kWp · 4.5 kWh/m²/day site | 1 | $55,000 |
| PV inverter | 250 kW | 1 | $8,750 |
| Battery energy storage (LFP) | 1000 kWh | 1 | $95,000 |
| PCS (power conversion system) | 250 kW | 1 | $12,500 |
| DC fast charger (120 kW) | 120 kW | 1 | $6,340 |
| AC charger (7 kW) | 7 kW | 2 | $440 |
| AC charger (7 kW) | 7 kW | 1 | $220 |
How it was calculated
- ['PV yield', '500 kW × 4.5 kWh/m²/day × 365 × 0.8 = 657,000 kWh/yr']
- ['Autonomy', '1000 kWh ÷ 140 kW = 7.1 h']
- ['CAPEX', 'PV $55,000 + inverter $8,750 + storage $95,000 + PCS $12,500 + chargers $7,000 = $178,250']
- ['Annual benefit', 'self-consumption 85% of PV at $0.15 + export at $0.04 + storage arbitrage']
- ['Economics', 'full-cost: CAPEX + discounted O&M + battery/inverter replacement (degradation 0.5%/yr) over 25 yr @ 8% WACC → NPV +$817,122, payback 2 yr']
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
How do I size a PV + storage + EV charging system?
Start from daily load: PV capacity covers daytime demand plus battery charging; the battery covers night and peak periods; EV charging adds a large coincident load. A 100 kW PV with 200 kWh storage and 6-10 chargers is a common C&I configuration. The configurator matches PV, BESS and charging capacity and reports the bill of materials and economics.
What is peak-shaving and how does storage enable it?
Peak-shaving charges the battery during low-price or high-PV periods and discharges during peak-price hours to reduce demand charges and grid imports. For a commercial site with a $10/kW monthly demand charge, cutting 200 kW of peak can save $24,000/yr. The configurator sizes the battery for the shaving strategy and quantifies the saving.
How does EV charging change the storage sizing?
EV charging is a sharp evening load that often coincides with peak tariffs, so storage is sized larger to serve it and avoid demand spikes. A 120 kW fast charger can draw 120 kVA; a 10-charger station peaks near 500-1200 kVA. The configurator adds charging load to the peak-shaving model and sizes BESS accordingly.
What battery chemistry is used for C&I energy storage?
LFP (lithium iron phosphate) dominates C&I storage for safety, cycle life (6,000+ cycles at 80% DoD) and cost, versus NMC which offers higher energy density but lower thermal stability. LFP round-trip efficiency is ~90-95%. The configurator prices LFP-based container and cabinet systems per IEC 62619.
What is the payback of a PV + storage + charging project?
Integrated C&I projects typically pay back in 4-7 years where tariffs and demand charges are high, driven by avoided energy cost, demand-charge reduction and EV charging revenue. The configurator computes full-cost economics — LCOE, payback, IRR and NPV — from your tariff, irradiation and load profile.
What grid standards apply to PV + storage + charging?
EV charging follows IEC 61851 and GB/T 51313; energy storage system safety follows IEC 62619/IEC 62933 and GB/T 36547; PV grid connection follows GB/T 19964 and IEEE 1547. The configurator cites these standards in its design basis and selects compliant equipment.
Size your own configuration
Run the calculator for your exact load and get a full BOM + FOB price.
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