Security Backup Power Calculator
A power cut should not switch off your security. Add your devices, choose how long you want them to keep running, and get the battery capacity, the UPS/inverter size and an indicative cost. Planning figures, not an electrical design — sizing and wiring is a licensed electrician's job.
- CCTV camera5 W
- NVR / DVR recorder25 W
- Router / internet (ONT)12 W
- PoE switch15 W
- Alarm panel10 W
- Video door phone8 W
- LED security light15 W
- Battery (50 Ah)₹6,500
- UPS / inverter (118 VA)₹2,500
Planning estimate only — real sizing depends on exact device draw, battery age and temperature, cabling and charger. If your cameras phone home over the internet, remember to back up the router too. Add surge protection, and have a licensed electrician design and install the actual system.
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.
SecurityCCTV 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.
SecurityVideo Door Phone Power Backup in India (2026): Keeping the Door Alive Through Power Cuts
How to keep the indoor monitor, door station and — for app kits — the router and ONT running through India's power cuts, using a small UPS, the home inverter circuit, or a built-in battery, so you can still see and answer the door.
SecurityRelated Tools — You may also find these useful
Access-Control Battery-Backup Calculator
Size the standby battery so an access system keeps running through a power cut, with an egress life-safety note.
Battery BackupInverter & Battery Calculator
Size a home inverter (VA) and battery (Ah) for the load you want to back up and the hours of backup you need.
Backup PowerSolar CCTV Sizing Calculator
Enter cameras, sun-hours and backup days to get the solar panel wattage, battery Ah and an indicative kit cost for an off-grid camera.
Solar Sizing