Size backup power systems: stationary batteries to IEEE 485, UPS and battery autonomy, generators and fuel, transfer switches, NFPA 110 emergency power, battery energy storage, emergency lighting, CHP, microgrids and peak shaving.
IEEE 485 duty-cycle section method for lead-acid battery capacity. Random loads, cell/voltage window checks and charger sizing are advanced features.
Required UPS kVA rating from critical load, margin and redundancy configuration, plus approximate battery energy/Ah for the stated backup time.
NFPA 110 Type/Class classification, UPS-to-genset bridge timing check, and staged load-step pickup planner.
Runtime and hourly cost from tank size and your genset's own fuel consumption rate.
IEEE 1547 / IEC 62933 usable-energy, nameplate capacity, C-rate and PCS voltage-window sizing with AC cable sizing. Multi-bank site aggregation & cycle-life estimate are advanced features.
NEC Art. 700/701/702 automatic/manual transfer switch ampacity from connected load, 125% continuous-load factor, next standard UL 1008 rating.
Check emergency lighting battery runtime against the 90-minute NFPA 101 / NEC 700.12 minimum, or size required Wh and Ah capacity with aging, DoD and inverter efficiency.
Preliminary CHP electrical capacity from electrical and thermal baseload demand and heat-to-power ratio, sized to the more limiting baseload.
Simplified 0-100 Stability Index for islanded microgrid screening from generation headroom, inertia and reserve margin.
BESS power/energy sizing to shave peak demand to a target level, with demand-charge savings and simple payback.
Why backup power is really two different technologies covering two different timescales, how NFPA 110's Type and Class ratings describe two independent things, and why nameplate battery capacity always overstates what's actually usable.