BESS Project Gross Margin Calculator

What this calculator does

• Calculate gross margin for a grid-scale BESS project by comparing project contract revenue against total CAPEX and project cost, then expressing the gap as a percentage of the contract value.
• Use it when a BESS project bid or project financial model needs a clean margin percentage to support a go or no-go decision at the investment committee or EPC bid review.

Formula used

• BESS project margin gap = contract revenue - total project cost
• BESS project gross margin = margin gap / contract value for margin reporting x 100

Inputs explained

• BESS project contract revenue: Enter the total customer contract value or EPC bid price for the BESS project.
• Total BESS project cost: Enter total project cost including battery equipment, PCS, civil works, installation, commissioning, transport, and contingency.
• Contract value for margin percentage reporting: Use the contract revenue as the denominator for margin percentage calculation to maintain consistent reporting across projects.

How to use the result

Common questions

• What cost per kWh should I use to estimate BESS project CAPEX? Installed BESS project CAPEX in the 2024 to 2025 period ranges from $250 to $400 per kWh for utility-scale LFP systems depending on duration, site complexity, and interconnection costs. Battery equipment alone ranges from $120 to $200 per kWh at the pack level. Use site-specific quotes and the most current OEM pricing when building a project financial model.