When the lights go out, a camera system without backup power goes dark with them. That is often exactly when you need it: a storm, a blackout, or a thief who cuts the power before breaking in. A UPS, short for uninterruptible power supply, is a battery unit that keeps equipment running through short outages and protects it from surges and brownouts. It is one of the cheapest upgrades you can make to a camera system. This guide explains how a UPS works, what to plug into it, how to size one, the difference between unit types, how long it will really last, how to maintain it and whether you need one for your home or business.
This is general information. Equipment specifications vary. Follow the manufacturer's instructions and have a professional size the unit for larger systems.
1. The Short Version
| Question | Answer |
|---|---|
| What does a UPS do? | Keeps equipment on through short outages; smooths power. |
| What to plug in | Recorder, PoE switch, router, modem. |
| How long will it last? | Minutes to a couple of hours, depending on load and battery. |
| Size by | Watts of load and desired runtime. |
| Maintenance | Test periodically; replace battery every 3 to 5 years. |
| Worth it? | For most recorded systems, yes. |
2. What a UPS Does
A UPS sits between the wall outlet and your equipment. It charges an internal battery. If power fails, the battery takes over within milliseconds, so devices keep running without a hiccup. If voltage is too high or low, it adjusts or switches to battery. Most units also provide surge protection. A UPS does not run a house; it buys time. That time lets the recorder shut down cleanly, keeps cameras recording through a short blackout and keeps the router online so alerts can still go out.
3. What to Put on It
Prioritize the core of the system.
- Recorder (NVR or DVR). Protects the drive from corruption during sudden power loss.
- PoE switch. Powers PoE cameras; without it, they go dark.
- Router and modem. Keeps the network and internet up.
- Any hub or controller. Smart home hubs, access control controllers.
Do not plug in large loads like space heaters or microwaves. If you have analog cameras with separate power supplies, those supplies need backup too. Our guide on PoE power budgets explains how much your switch draws.
4. How to Size a UPS
Add up the power draw in watts of everything you plan to protect. A small NVR might use 20 to 40 watts, a PoE switch powering four cameras 60 to 100 watts including the cameras, a router and modem 20 to 30 watts. A system might total 100 to 200 watts. UPS ratings are in volt-amperes (VA) and watts. Choose a unit with a watt rating comfortably above your load, then check the runtime chart from the manufacturer for your load. A rough rule: runtime in minutes falls quickly as load rises. A 1,000 VA / 600 W unit powering 120 W may run about 20 to 40 minutes, depending on the model and battery condition. Use the manufacturer's chart.
5. Types of UPS
Standby (offline). Cheapest; switches to battery when power fails. Fine for light use.
Line-interactive. Adjusts voltage without using the battery, with a quick transfer. A good choice for most camera systems.
Online (double conversion). Constantly powers equipment from the inverter. Best protection, more expensive and sometimes noisier. Used for critical business sites.
For homes and small businesses, a quality line-interactive UPS is the usual choice. Larger sites may use rack-mounted units or larger systems. Ask your installer what fits.
6. How Long Will It Last?
Most UPS units are designed for minutes, not days. Expect 10 to 60 minutes for a typical camera load on a mid-size unit, longer with a smaller load or larger battery. That covers many brief outages and gives time to shut down gracefully. For long outages, add more battery capacity, a larger system or a generator. Some UPS units can notify the recorder to shut down safely when the battery runs low. For long-duration protection at remote sites, discuss options with your installer.
7. Protect the Drive
Hard drives can be damaged by sudden power loss, especially while writing. A UPS lets the recorder finish writing and shut down. This is one of the best arguments for a UPS: protecting your footage and extending drive life. Our guide on hard drive failure signs explains how power events contribute to failure.
8. Surges and Brownouts
New York storms and grid events cause surges and voltage dips that damage electronics. A UPS provides some protection, but outdoor cameras, long cable runs and lightning can bring surges through the data lines as well. Add surge protection on exterior cable runs where appropriate. Our guide on surge protection for camera systems explains the layers.
9. Placement and Safety
Place the UPS in a ventilated area, off the floor if the basement can flood, away from heat and moisture. Do not cover vents. Do not plug a power strip into a UPS and chain strips. Follow the manufacturer's instructions on loads and extension cords. Batteries contain chemicals and can swell or leak when old; replace them on schedule and dispose of them properly. Check local rules for battery recycling, such as through the NYC Department of Sanitation at nyc.gov.
10. Maintenance
Test the UPS every few months by unplugging it from the wall for a minute and watching that equipment keeps running. Check its self-test and alerts. Replace batteries every three to five years, sooner if the unit warns. Keep a note of the install date on the unit. A dead UPS battery gives false confidence. Many units have smartphone or network monitoring so you get an alert when power fails.
11. Do You Need One?
Yes, in most cases, if you have a recorder. Especially if you live in an area with frequent outages, have a business, run a vacation property, rely on alerts or have a history of storm damage. Maybe not, if you have a single battery camera or a cloud camera with a built-in battery. If the recorder is on a power strip with no protection, the answer is almost certainly yes. Ask your installer to include it in the quote.
12. What a UPS Won't Do
It won't keep Wi-Fi alive if the internet provider's equipment goes down. It won't keep a modem running if your provider's network loses power. It won't power floodlights or large loads for long. It won't fix a poor installation. Pair it with local recording, cellular backup if needed and good design. Our guide on what happens to cameras when the internet goes out explains the other half.
13. Cost
Planning ranges in 2026: small standby UPS, $60 to $150; line-interactive UPS for a camera system, $120 to $450; larger rack or online units, $500 to $2,500; replacement battery, $40 to $200; professional installation, often $50 to $200 as part of a camera job; four-camera home system, $1,600 to $3,600; eight-camera system, $3,000 to $6,800. These are planning ranges, not quotes.
14. News Context
Power is the first thing a determined intruder or a storm can take away. In February 2026, NYPD released stills and video from a Staten Island doorstep to help identify three young men who tried to enter three homes overnight, according to CBS News New York. In September 2026, News 12 reported that NYPD sought two suspects in 19 commercial burglaries across 16 Brooklyn neighborhoods. A system that stays on through a short outage can keep the footage coming.
NYPD reported burglary down 19.5% citywide in May 2026 compared with May 2025 (NYPD).
15. Questions to Ask Your Installer
- Do you recommend a UPS for my system, and what size?
- What will it power, and for how long?
- Will the router and modem be on it too?
- How do I test it, and when should I replace the battery?
- Can I get alerts when it switches to battery?
- Do you recommend surge protection on outdoor runs?
See our local pages for security camera installation in the Bronx, commercial camera installation in Staten Island, home camera installation in Nassau County and our services page.
Want your system to survive the next outage? Revolvis will walk the property with you and mark the spots, including where the UPS should sit.
16. A Quick Sizing Example
A hypothetical four-camera home: NVR 25 W, eight-port PoE switch with four cameras 70 W, router and modem 30 W, total 125 W. A 1,000 VA / 600 W line-interactive UPS comfortably handles that load and, depending on model, might run it for roughly half an hour. If you wanted two hours, you would look at a unit with extra battery capacity or lower the load. Always check the manufacturer's runtime chart and leave headroom, since batteries lose capacity with age.
More From Revolvis
Cameras are one layer of a secure property. The same in-house crew also handles the rest:
- Keyless entry installation and smart lock installation
- Access control systems and commercial access control
- Video doorbells and intercoms
- Alarm system installation
- Complete unified security
Learn more about Revolvis, meet the team, see all services, browse the blog or contact us.
Areas We Serve
Revolvis installs residential and commercial camera systems across the New York metro area. Every borough and county has its own building stock, rules and wiring challenges, so the plan for a Queens two-family is not the plan for a Manhattan co-op.
- Staten Island: houses, detached garages and shop fronts. See security camera installation in Staten Island.
- Brooklyn: brownstones, row houses and storefronts. See security camera installation in Brooklyn.
- Queens: attached brick homes, two-families and busy commercial strips. See security camera installation in Queens.
- The Bronx: pre-war buildings, bodegas and warehouses. See security camera installation in the Bronx.
- Manhattan: co-ops, condos, offices and retail. See security camera installation in Manhattan.
- Long Island: Nassau County and Suffolk County.
- New Jersey: Jersey City, Newark, Hoboken and nearby towns.
The full list is on the service areas page.
Get a Custom Quote After a Site Visit
Revolvis prices every job after a site visit, because the building sets the cost as much as the equipment does. A few things make the estimate faster and more accurate:
- The address and property type: house, apartment, co-op, condo, storefront or warehouse.
- Which doors, sides and areas you want covered, and what worries you most.
- Photos of those spots and any spots where you already have cabling or power.
- How many days of footage you want to keep and whether you want to watch on your phone.
- Any landlord, board, lender or insurer requirement.
Call 347-258-9165 or use the contact page to book a site visit. The quote you receive is written and itemized, so you can compare it line by line.
Frequently Asked Questions
Do I need a UPS for security cameras? If you have a recorder, usually yes. It protects the drive and keeps recording through short outages.
What should I plug into it? The recorder, PoE switch, router and modem.
How long will it run? Often 10 to 60 minutes for a typical load; check the runtime chart.
What type is best? A line-interactive unit suits most homes and small businesses.
How often should I replace the battery? Typically every three to five years.
Does a UPS stop surges? It helps, but add surge protection on outdoor cable runs too.
Ready for a custom quote? Call Revolvis at 347-258-9165 for a site visit and a written, itemized estimate.
Safety note: A camera system supports, but does not replace, good locks, lighting, alarms and everyday habits. If you are in danger or witnessing a crime, call 911. Prices and legal summaries in this guide are general information for the New York metro area, not an offer or legal advice. A written quote after a site visit governs your actual price, and for legal questions you should confirm with the agencies linked in the article or a licensed attorney.