The single biggest choice after sizing
Once you know roughly what size generator your home needs, the next real decision is fuel: natural gas or propane (LP). Both run the same kinds of standby units reliably, and both are far more practical than the gasoline a portable generator burns. But they behave differently — in cost, in convenience, and especially in how they hold up during a multi-day hurricane outage. Which one is right depends mostly on where your home sits and what’s already in the ground.
As always: we’re a resource that links you to one vetted, licensed local installer, and they’ll confirm what’s feasible at your address. Here’s the framework so the conversation goes faster.
When natural gas wins
For a lot of greater Houston, natural gas is the default — and a good one. CenterPoint Energy distributes natural gas across much of the metro, so if your neighborhood already has gas service running to the home, hooking up a standby generator is often straightforward and is the lowest-fuss option going.
The big advantages:
- No tank, no refills, no running out. The gas line is effectively an unlimited supply for as long as the distribution system keeps flowing. You don’t store fuel, monitor a gauge, or schedule deliveries.
- Lower ongoing fuel cost per hour than propane in most cases.
- Nothing to take up yard space — no tank to site, bury, or screen from view.
The main catch is line capacity. A standby generator is a hungry appliance, and an existing gas line sized for a furnace and water heater may not deliver enough volume under full generator load. Your installer may need to confirm or upgrade the supply line and regulator so the unit isn’t starved when every AC compressor is running. If gas already reaches homes like yours in Houston, Pearland, or the built-up parts of the metro, natural gas is usually the path of least resistance.
When propane wins
Propane comes into its own where natural gas service simply isn’t available — and that’s more common than newcomers expect. Out toward Waller County, the rural edges of Montgomery County, parts of Brazoria County, and other outlying or unincorporated areas, gas lines may not run to the property at all. There, propane is the natural answer.
What propane brings to the table:
- You own your supply. A tank on your property means you’re not dependent on the gas distribution network staying pressurized during a regional event.
- Higher energy density, which can mean slightly more output from the same engine compared with natural gas (relevant to sizing and fuel de-rating).
- Available essentially anywhere — if a truck can reach you, you can have fuel.
The tradeoffs: you have a tank to site (above-ground or buried, with setback rules), you pay for deliveries, and you can run out if you don’t manage refills — which matters most precisely when you need the generator. Sizing the tank generously is the move for storm country.
Runtime and refueling, side by side
This is where the choice gets practical. A natural-gas unit runs as long as the pipeline keeps flowing — potentially indefinitely — with zero intervention from you. A propane unit runs until the tank empties, and then it stops until refilled. So your real runtime on propane is a function of tank size and load. A larger tank buys more days; running fewer circuits stretches every gallon. Many homeowners who go propane in this region deliberately oversize the tank for exactly that reason.
Hurricane fuel planning — the Houston reality
Here’s the nuance that storm experience teaches. Natural gas distribution is largely buried and tends to keep flowing even when overhead power lines come down across the metro — a real point in its favor during the kind of week-long, wind-driven outage Houston saw with Beryl in 2024. That underground delivery is a quiet strength right when you need it.
Propane’s strength is independence: your fuel is on-site, immune to grid and pipeline events — as long as the tank is full when the storm arrives. The failure mode is logistical. After a major hurricane, propane delivery trucks face the same blocked roads, fuel shortages, and demand surges as everyone else, so a tank that’s low when landfall hits may not get refilled quickly. The discipline that pays off: top off the tank before hurricane season and again whenever a system is in the Gulf, and size it to outlast a realistic multi-day event without a refill.
If your home can have either fuel, weigh the convenience and continuity of natural gas against the on-site independence of a well-managed propane tank. Neither is wrong — they fail in different ways, and you’re choosing which risk you’d rather carry.
Bringing it together
Fuel, size, and installation all interact, so it’s worth reading across them. Start with the sizing guide, confirm whether standby power even fits your situation in do I need one, and review what the install day and permitting process look like — fuel hookups often drive the permit. Once installed, the maintenance guide keeps it ready. The fuel overview on the hub has a shorter recap.
When you want a licensed installer to confirm what’s available at your address, we’ll connect you with our vetted local partner — begin at the home page or your city page: Houston, Pearland, or League City.