🔋 NFPA 855 (3-ft Separation vs 2-Hour Fire Barrier Walls, Max 50 kWh Unit Energy)

NFPA 855 BESS Spacing Calculator

Size unit physical spacing and 2-hour fire resistance-rated barrier separation walls between stationary Battery Energy Storage Systems (BESS) under NFPA 855 Table 4.4.3.4: calculate maximum 50 kWh unit capacity group aggregation, minimum 3.0-foot spatial clearance, verify property line setback exemptions, and utility storage fire safety contracting profits.

1. Project & Operating Inputs

Total BESS Battery Groups (Group Count e.g. 16 50-kWh Battery Racks)

Fire Barrier Wall Rating (Hours e.g. 2.0-Hour UL 263 Fire Wall)

Customer Bid Price for Supplied & Erected Fire Barrier Array ($)

2-Hr Rated Precast Concrete Panels, Structural Steel Posts, Riggers ($)

2. Financial Breakdown & Yield

NFPA 855 BESS SPACING

Turnkey BESS Fire Separation Wall Profit

Battery Storage Safety Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost