Generator Sizing Calculator
A generator too small trips on load; too big wastes fuel and money. Tick what you want to keep running in a power cut, allow for motor/AC starting surge, and get the recommended kVA rating.
Next standard rating above the 5.31 kVA your loads and surge need.
Indicative only. Appliance wattages and starting surges vary, and a large motor or AC compressor can draw several times its running current at start-up. Final genset sizing, the changeover/AMF panel, earthing, exhaust and fuel arrangement must be designed and installed by a qualified electrical engineer to the relevant standards. For many homes, an inverter-battery or solar-hybrid backup is a quieter, cleaner alternative.
Related Guides — Deep-dive reading
Electrical Backup Assessment for Home Security in India
The under-appreciated gap: a power cut silently disables your cameras, NVR, alarm, gate motor, router and Wi-Fi, leaving the home undefended exactly when it may be most vulnerable. How to map the security load, test what your inverter really covers, size backup, and protect against grid surges.
SecurityInverters & Batteries: How They Work & How to Size Them
The silent workhorse of Indian home backup — how an inverter turns battery power into mains, what the VA rating means, why sine-wave matters, how to size the inverter to your load and the battery to your backup hours, and how to keep the system healthy.
Electrical & WiringCCTV Power Supply and UPS Backup in India (2026): Keep Watching Through a Power Cut
How to power the cameras and the recorder reliably in Indian homes - 12V DC adapters vs PoE power, why the NVR, PoE switch and router must ALL sit on a UPS or inverter, sizing runtime, and protecting the whole chain from spikes and lightning.
SecurityRelated Tools — You may also find these useful
AC Capacity Calculator
Find the right air-conditioner tonnage for a room — from area, sun, floor, occupancy and climate. Right-sized, not oversized.
HVACAC Installation Cost Calculator
An indicative equipment + installation budget for your home's air conditioning — by AC type, tonnage and number of units, with a realistic range.
HVACAC Running Cost Calculator
What your AC costs to run each year — from tonnage, BEE star rating, hours and tariff — plus how much a higher star rating saves.
HVAC