In short: a hotel’s backup power has to keep guests safe first (exit lighting, fire alarm, elevators, water pressure), then keep the business running (refrigeration, front desk systems, key cards, Wi-Fi). Most hotels use a standby generator sized by an engineer, sometimes with batteries and solar to cut demand charges. EV charging is a separate, growing guest amenity.
At 2 a.m. in a storm, a hotel is a building full of people who don’t know where the stairs are. That’s why hotel power planning starts with life safety and works outward. This page covers critical loads, generator and battery options, codes, EV charging for guests and the economics of solar and storage, with the numbers we could verify. It is part of our energy guide for businesses.
Hotel energy at a glance
- Three tiers of backup: code-required emergency loads, legally required standby loads and optional standby loads (National Electrical Code Articles 700, 701 and 702). Your engineer and local inspector decide which loads fall where.
- Outages are getting longer: the average U.S. customer was without power about 11 hours in 2024, nearly double the prior decade’s average (EIA). In 2024, South Carolina, North Carolina, Florida and Texas customers averaged more than 1,200 minutes, including major storms.
- Power prices vary widely: commercial electricity ran from 8.47 cents per kWh in Texas to 30.56 in California and 43.63 in Hawaii in July 2026 (EIA, preliminary). Florida was 11.37, North Carolina 10.73, South Carolina 11.61 and Illinois 15.19; see your state.
- Federal credits changed: the EV charger credit (30C) ended for property placed in service after June 30, 2026; solar credits are closing for projects that start late (see below).
What a hotel must keep running
Sort every load into one of three groups before anyone talks about generator size.
| Group | Typical hotel loads | Why it matters |
|---|---|---|
| Life safety | Exit signs and egress lighting, fire alarm, fire pump where present, smoke control, at least some elevator service | Required by code in many buildings; designed and tested to strict rules |
| Guest essentials | Domestic water booster pumps (mid- and high-rise), hallway and stair lighting, heating or cooling for occupied floors, phones | Guests can’t stay safely without water and light |
| Business continuity | Kitchen refrigeration and freezers, property management and key-card systems, point of sale, Wi-Fi and network, laundry | Lost food, locked-out guests and refunds add up fast |
A small limited-service property might cover the second and third groups with a modest generator; a full-service tower usually needs a larger system with automatic load shedding so the most important loads always come first. NFPA 110, which sets performance rules for emergency and legally required standby systems, lists that order of priority: emergency circuits, then legally required standby, then optional standby.
Backup power options for hotels
| Option | Strengths | Watch out for |
|---|---|---|
| Diesel standby generator | Fuel stored on site; long runtime with refueling; common for code-required loads | Fuel storage, upkeep and testing; air permits in some areas |
| Natural gas standby generator | No fuel deliveries; runs as long as gas flows | Gas supply can be interrupted in some disasters; check whether your inspector accepts it for emergency loads |
| Battery storage | Silent, instant, no exhaust; can also cut demand charges every month | Limited hours of backup; fire-code rules for placement |
| Solar plus storage | Lowers daytime bills; recharges batteries in long outages | Roof or carport space; needs storage to work in an outage |
| Rental generator hookup | A pre-wired connection so a rented unit can be plugged in quickly | Rentals are scarce after big storms; not a substitute for code-required systems |
Safety with any fuel-burning generator: carbon monoxide is the hidden danger. Permanent units are installed outside or in rated rooms to code. If a portable or rental generator is ever used, keep it outdoors and well away from doors, windows and air intakes; CPSC’s rule for homes is at least 20 feet with the exhaust pointed away. Make sure carbon monoxide alarms meet your local code.
Sizing: how the number is found
- Gather data. Twelve months of utility bills and, if your utility offers it, interval data showing your peak demand.
- List loads by group as in the table above, including motor starting needs for elevators, pumps and chillers.
- Decide the runtime you want on site fuel or batteries, based on your local outage history.
- Have an engineer or licensed electrical contractor do the load calculation and design, and get it permitted.
What it costs
We have not found a government or industry source for hotel backup costs. The only installed ranges we found are vendor estimates for small commercial standby generators: about $22,000 to $30,000 for a 30 kW unit and $28,000 to $40,000 for 50 kW (ZCC Power and Turnkey Industries blogs; estimates, not checked against projects). Most hotels need more than that, and costs rise with size, fuel, transfer switches, enclosures and whether loads are code-required. Treat any figure as a starting point and get two or three quotes, each based on the same load list and runtime so you can compare them line by line. Plan for regular service and testing too.
Maintenance and testing
A generator that has not been exercised is the one that fails in the storm. Emergency and legally required standby systems have testing and maintenance rules under NFPA 110 and local codes, and your inspector may ask for the records. Even an optional standby unit needs regular oil, filter, coolant and battery service, plus a periodic run under load. Ask any installer for a written service plan, who keeps the logs, and how quickly they respond after a storm, when every technician in the region is busy. Keep fuel tanks topped up before hurricane or winter storm season.
EV charging as a guest amenity
Overnight guests park for hours, which suits Level 2 charging. The U.S. Department of Energy’s Alternative Fuels Data Center lists Level 2 equipment from about 2.9 to 19.2 kW; and most home-style units deliver about 7.2 kW, plenty for a car parked overnight. DC fast chargers make sense mainly for roadside properties where drivers stop briefly, and they need much more electrical capacity.
- Load management lets several chargers share one circuit so you don’t pay for a service upgrade or set a new demand peak.
- Utility make-ready programs in some areas pay for part of the wiring; ask your utility before you design.
- Pricing and access: free for guests, a flat fee, or per-kWh billing through a network; decide before you choose hardware.
- Accessibility: accessible parking and charging rules apply to public facilities; your designer should check them.
The details are in our commercial EV charging guide. California, Florida and Texas had the most registered battery-electric cars in 2025 (AFDC): about 1.84 million, 450,400 and 387,400.
Solar and storage economics for hotels
Hotels use power around the clock, so solar covers part of the daytime load and storage does double duty: it trims monthly demand charges and supports critical loads in an outage. The case is strongest where commercial rates are high, such as California (30.56 cents) and much of the Northeast, and weaker in Texas (8.47 cents), where a battery’s demand-charge savings and outage protection may matter more than the energy itself. Our commercial solar and commercial battery guides explain purchase, lease and PPA options.
On federal credits, IRS guidance says the 48E and 45Y credits end for solar and wind facilities placed in service after 2027 when construction begins after July 4, 2026; storage has separate rules, and foreign-entity sourcing limits apply. Ask a tax professional before counting on any credit.
Do these next
- Pull 12 months of bills and find your peak demand (kW) and your worst outage in recent years.
- List your loads in the three groups above and how many hours you need each one.
- Send us the basics below, and read commercial backup generators while you wait.
Get help with your hotel’s power
Tell us about your project and we will connect you with a licensed, independent installer who serves your area. It is free, there is no obligation, and only the installer you choose gets your details. Read how it works. For chargers or solar, use the forms on commercial EV charging and commercial solar.
Questions hotel owners ask
Are hotels required to have a backup generator?
Not always a generator, but most hotels must have emergency power for exit lighting, exit signs and fire alarms, and some for fire pumps, smoke control or elevators. That can come from batteries in fixtures or from a generator, depending on the building and local codes. Your fire marshal or building official and your engineer decide what applies to your property.
What size generator does a hotel need?
There’s no rule of thumb we can stand behind. It depends on which loads you back up, elevator and pump motors, cooling, and kitchen equipment. A limited-service hotel covering only life safety and essentials needs far less than a full-service hotel backing up everything. An engineer sizes it from your bills, interval data and a load list.
Can batteries replace a hotel generator?
For short outages and peak shaving, often yes. For outages lasting a day or more, batteries alone get large and expensive, so most hotels keep a generator for long events and use batteries for instant ride-through and demand-charge savings. Whether batteries may serve code-required emergency loads is up to your local authority.
Should a hotel install Level 2 or DC fast chargers?
For overnight guests, Level 2 usually fits: cars sit for hours, the equipment is cheaper and needs far less electrical capacity. DC fast charging suits roadside properties where drivers stop for a meal and leave. Start with a few Level 2 ports with load management and wiring sized for more later.
Is there still a tax credit for hotel EV chargers?
Not the federal one. The alternative fuel refueling property credit (30C) ended for chargers placed in service after June 30, 2026. Some utilities and states run make-ready or rebate programs for commercial chargers. Ask your utility, check your state page, and confirm with a tax professional.
Sources: NFPA 110 and NFPA 70 (NEC) committee documents on Articles 700 to 702 and load priority; EIA Today in Energy (December 1, 2025) and EIA-861 2024 reliability data; EIA Electric Power Monthly Table 5.6.A (July 2026); AFDC electricity charging stations page and 2025 vehicle registrations; CPSC generator safety (2026); IRS Notice 2025-42 and Form 3468 instructions; ZCC Power and Turnkey Industries blogs (labelled estimates). We found no hotel-industry data we could verify. Written by the SolutionEnergy editorial team; last reviewed October 2026.