Napoleon Prestige 500 RSIB Review

What this grill actually is

The Prestige 500 RSIB sits at the top of our gas registry, and the first thing to understand about it is that its main burners are not the reason. Four burners at a combined 48,000 BTU over 500 square inches of primary grate works out at roughly 96 BTU per square inch — healthy, and almost exactly what you would get from a Weber Genesis S-435 at the same main-burner rating. If main-burner output is all you want, this grill is expensive for what it does.

What separates it is that it carries two burners that are not tube burners at all. The RSIB designation in the model name is the giveaway: Rear and Side Infrared Burners. A 16,000 BTU infrared side burner — Napoleon calls it the SIZZLE ZONE — and an 18,000 BTU infrared rear burner behind the cooking grates for rotisserie work. Those two account for 34,000 of the grill’s 82,000 BTU total, and they are what the price premium is actually for.

For the reader this site is written for — someone who already owns a grill, knows what a two-zone fire is, and is upgrading a specific weakness — that matters. The weakness an infrared burner fixes is one a conventional gas grill genuinely has, and we will come back to what it is.

The published specs

Every figure below is read from the source named in the product card above. We own no units and have tested nothing; our methodology sets out exactly what that means.

Two of those rows deserve a warning rather than praise. 82,000 BTU is a total, not a main-burner figure, and it is the number that will be quoted at you in a showroom. Comparing it against a Weber Genesis’s 39,000 or 48,000 BTU main-burner rating is invalid — that is comparing a sum to one of its terms. Our guide to how many BTUs a gas grill needs explains why that distinction decides more purchases than it should.

And 914 square inches is a total area too.The honest figure for comparison is 500 square inches of primary grate — the surface directly over the burners that you can actually sear on.

The SIZZLE ZONE: what an infrared burner is for

A conventional gas burner heats air, and the air heats your food. That works, and it has a ceiling: you cannot get a tube burner meaningfully past the temperature at which it is already heating the whole cookbox, so a gas grill tends to top out somewhere that produces a decent crust but not a steakhouse one.

An infrared burner heats a ceramic or metal surface, and that surface radiates heat directly onto the food. Very little energy goes into the air. The practical consequence is a small, extremely hot zonethat browns the outside of a steak faster than the heat can travel inward — which is the entire technical definition of a good sear. At 16,000 BTU over a side-burner footprint, this is a searing station, not a second grill.

Two honest caveats. First, it is small: it is sized for one or two steaks, so if you are searing for six you are doing it in batches. Second, it is the single feature most likely to go unused. If your cooking is burgers, sausages and chicken thighs, the SIZZLE ZONE will sit under its cover for years, and you will have paid a lot for it. Be honest with yourself about which of those two cooks you actually are.

The rotisserie burner, and why “kit included” matters

The 18,000 BTU rear infrared burner exists for one job: turning meat on a spit in front of radiant heat rather than above a flame. It is the right way to cook a whole chicken or a pork loin on gas, and it produces something a grate genuinely cannot.

The commercially relevant detail is that the rotisserie kit is included with this model. On most grills that advertise a rear burner, the motor, spit and forks are a separate purchase, and that purchase is not cheap. A rear burner with no kit is a feature you have not finished buying. Worth checking on whatever you cross-shop this against.

Grates: 8.5 mm stainless, and what that number does

Grate mass is the most underrated spec in gas grilling. When a cold steak lands on a grate, it pulls heat out of the metal; a thin grate loses that heat instantly and the steak steams in its own moisture instead of browning. A thick one has enough stored energy to keep searing.

8.5 mm stainless is at the heavy end of what mainstream gas grills ship. Stainless also behaves differently from the porcelain-enameled cast iron Weber uses: cast iron stores slightly more heat per unit volume, but its enamel coating can chip, and once it does the iron underneath rusts. Bare stainless cannot chip because there is no coating to lose. Neither is wrong — stainless trades a little heat retention for essentially unlimited service life, which pairs logically with a lifetime warranty.

The warranty is a real part of the value

“Lifetime, bumper to bumper” is the strongest published warranty term in our gas registry, and on a grill in this price class it is not a throwaway line. A premium gas grill is a ten-to-fifteen-year purchase, and over that period the things that fail are burners, ignition components, grates and the cookbox — precisely what a bumper-to-bumper term covers.

Compare it to what else is on the shelf: Weber publishes 10 years on the Spirit cookbox and burners and 12 on the Genesis cookbox. Those are good terms. A lifetime term is better, and it is the reason the per-year cost of this grill is not as far above a Genesis as the sticker price suggests. Read the actual terms before you rely on that — warranties are documents, not slogans, and the registration requirements and exclusions are the parts worth your attention.

What it costs you

The two honest arguments against this grill are in the product card above, and both are real.

It costs considerably more than a Weber Genesis of comparable size. That is the whole decision in one sentence. A Genesis E-325 gives you 39,000 BTU over 513 square inches of primary grate — more primary area than the Napoleon — with cast-iron grates and a 12-year cookbox warranty, for a great deal less. If you do not specifically want infrared searing or rotisserie, the Genesis is the better buy and we would say so.

Two extra burners are two more things that can eventually fail. Complexity has a cost. An infrared burner, a rotisserie motor and the extra ignition circuits are all components a three-burner Spirit simply does not have. The lifetime warranty is the mitigation, not the absence of the risk, and “covered” still means a service call and a wait.

One more thing worth saying plainly: this grill is overkill for most backyards, and that is not a criticism of the grill. If your honest weekly cook is six burgers and some chicken, a Weber Spirit E-325 at a third of the money will cook them identically and leave you with enough left over for a good thermometer and a year of charcoal for something else.

How this is funded: we earn a commission if you buy through our links, at no extra cost to you. It never changes which product we recommend, and we’ll tell you when we’d skip one, or point you to a cheaper option when it’s the better buy. Full disclosure.

The Prestige 500 and what to weigh it against

Live prices on all three

Prices are fetched live and date-stamped — compare the numbers in these rows rather than any figure in the text. All three are in our registry with specs read from the sources named in their cards.

If you want infrared

Napoleon Prestige 500 RSIB Gas Grill

48,000 BTU main plus a 16,000 BTU SIZZLE ZONE and an 18,000 BTU rear rotisserie burner with the kit, on 8.5 mm stainless wave grates, under a lifetime warranty.

$1,879.00 · View on Amazon

Price as of October 14, 2026. #ad How we’re funded

If you want value

Weber Spirit E-325 3-Burner Gas Grill

31,000 BTU over 360 sq in, cast-iron grates, a Sear Zone burner and a 10-year cookbox and burner warranty. Cooks the same weekly food for a fraction of the money.

$499.00 · View on Amazon

Price as of October 14, 2026. #ad How we’re funded

If space is the constraint

Weber Q 2800N+ Portable Gas Grill

320 sq in and a published 250-700°F range in a ~32 lb body. The pick when a four-burner cart will not fit the space at all.

$449.00 · View on Amazon

Price as of October 14, 2026. #ad How we’re funded

Who should buy it

• The cook who sears steaks regularly and has decided that the crust a tube burner produces is not good enough. This is the clearest case, and the SIZZLE ZONE is a genuine answer rather than a marketing one.
• Anyone who wants rotisserie cooking without a second purchase. The rear burner plus the included kit is the complete version of that feature.
• The buy-it-once buyer.If you intend this to be your last gas grill, the lifetime term and the 8.5 mm stainless grates are aimed exactly at you, and the per-year arithmetic is more favorable than the sticker.
• Someone cooking for six or more regularly who wants the capacity and would rather not buy twice.

Who should not

• Anyone whose cooking is weeknight burgers and chicken. Buy the Weber Spirit E-325 and spend the difference on better meat.
• Anyone who wants maximum primary grate per dollar. A gas grill under $1,000 buys more usable cooking surface, straightforwardly.
• Anyone chasing smoke flavor.No gas grill is the answer here and this one is no exception — a propane burner makes heat, not smoke. If that is the real goal, read offset smoker vs pellet grill instead and spend the money there.
• Anyone with a small patio or a balcony. This is a four-burner cart. See best grills for small patios and balconies.

Where to go next

The direct cross-shop is Napoleon vs Weber, which puts this grill against the Weber Genesis S-435 at an identical 48,000 BTU main-burner rating and shows where the money actually diverges. The premium tier as a whole is in best high-end gas grills. If you are still working out how much grill you need, the gas grill buying guide is the checklist and how many BTUs is the arithmetic. And once it arrives, how to use a gas grill covers the preheat-and-two-zone routine that makes any of this worth it.

And if this grill is simply more than the space or the budget allows, the decision one tier down is between Weber’s entry cart and its portable — two grills at a similar price that are not really competing on specs at all: Weber Q vs Weber Spirit.