Security cameras + NVR: how much battery you need
Security cameras + NVR (4 cams) draws about 30 W (20–60 W range), runs 100% of the time and uses 720 Wh per day. Start-up surge: 40 W.
~700 Wh a day; PoE cameras count 5–8 W each, the NVR with a hard drive 10–20 W.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 240 | 364 | 33 / 40 |
| For 24 hours | 720 | 1091 | 33 / 40 |
| For 72 hours | 2160 | 3273 | 33 / 40 |
Open in calculator with this appliance →
Stations that fit (24 h)
Shop links are affiliate links: if you buy, we earn a small commission at no cost to you. Picks are based on your numbers, not on commission.
FAQ
How many watts does a Security cameras + NVR (4 cams) use?
Typically 30 W while running, with a range of 20–60 W depending on model and age. Start-up surge can reach 40 W.
How long will a 1000 Wh power station run a Security cameras + NVR (4 cams)?
About 22 hours on the clock, allowing for the 100% duty cycle, inverter losses and a 20% reserve.
What size power station do I need for a Security cameras + NVR (4 cams) overnight (8 h)?
About 364 Wh of battery and an inverter rated at least 33 W continuous with 40 W surge.
Can I run a Security cameras + NVR (4 cams) on solar during an outage?
You need roughly 480 W of panels in winter to replace a day's use (720 Wh), charging through a station with a big enough MPPT input.
Other appliances
Inverter efficiency 88%, usable depth of discharge 90%, reserve 20%. Full method: How we calculate. source