What's inside
1
NFPA 855:2023 maximum permitted BESS energy by installation type
NFPA 855:2023 §4.3.3
2
NFPA 855 separation distances — cabinet-to-cabinet, property line, openings
NFPA 855:2023 Table 4.3.3
3
IEC 62933-5-2 deflagration vent sizing rule of thumb with worked example
IEC 62933-5-2:2020
4
UL 9540A thermal runaway cascade spacing — LFP vs NMC cell-to-cell and pack-to-pack
UL 9540A §6
Related calculators
The cheatsheet is the table. These tools run the full calculation.