Jobsite Power & Electrical

29 Products · 11 Generators with CO Shutoff · 10 Extension Cords · 8 Battery Power Stations

Which jobsite power source fits the work?

Short answer: it depends far less on wattage than on where the work is happening. A generator is the highest-output option and the only one that produces carbon monoxide, so it can never run inside. An extension cord moves existing power to where you need it and its whole risk lives in gauge and length. A battery power station produces no exhaust at all, which makes it the only source of the three that belongs in an enclosed space. Decide the location first, then the watts.

This collection is the parent of three: 11 jobsite generators, 10 extension cords and reels, and 8 portable power stations. Every product here sits in one of those three, so this page exists to compare across them rather than to duplicate them.

Why does carbon monoxide dominate the generator decision?

Because it is the hazard that actually kills generator users, and it gives no warning. Carbon monoxide is colorless and odorless, it binds to hemoglobin far more readily than oxygen does, and the early symptoms — headache, dizziness, nausea — read like fatigue or flu. People have died in attached garages with the door open, in basements, and on porches, because "partially enclosed" is enough. Our guide to CO exposure symptoms covers what to watch for, and the NIOSH carbon monoxide topic page covers the occupational picture.

All eleven generators in this collection carry an automatic CO shutoff — a sensor that kills the engine when CO builds up around it. That is genuinely the most important safety development in portable generators in decades, and it is worth having.

It is also not permission to run one indoors. A shutoff reduces harm when something has already gone wrong; it does not make an enclosed space safe, it can fail, and it does nothing about the CO already accumulated when it trips. The rule does not change: outdoors only, well away from doors, windows and vents, never in a garage even with the door open. How to run a generator safely covers placement in detail.

What certification should a CO shutoff carry?

Two standards define this feature, and knowing them separates a tested implementation from a marketing line: ANSI/PGMA G300 and UL 2201. Both specify how a CO shutoff system must detect and respond, and a generator certified to either has had that system tested rather than merely fitted.

Look for the marking on the unit or in the manufacturer's specification. None of the listings in this collection currently states which standard its shutoff is certified to — the feature is described, the certification is not — so if that distinction matters to your procurement, verify it with the manufacturer before ordering. Our comparison of generators with CO shutoff goes through the field.

A CO shutoff is also not a substitute for monitoring the space people are actually working in. If a generator is running anywhere near an occupied structure, a carbon monoxide monitor inside is the control that protects the people, not the machine — see OSHA CO monitoring requirements.

How do you size an extension cord?

Two numbers, and most people get the relationship backwards. Gauge (AWG) runs inverse — a lower number is a thicker conductor, so 12 AWG is heavier than 14 AWG. And length works against you: the longer the run, the more voltage drops along it.

Undersized cord plus long run produces voltage drop, and the consequences are not subtle. The tool receives less voltage than it needs, so a motor draws more current to compensate, runs hotter and dies early. The cord itself heats up along its whole length — which is why an overheating cord is a fire risk rather than just an inconvenience, and why a coiled cord under load is worse still because it cannot shed that heat.

The practical rule: pick the gauge for the combination of amp draw and length, not for either alone. A cord that is fine at 25 feet may be undersized at 100 feet for the same tool. Where a cord is permanently deployed, a reel keeps it off the ground and out of the trip path — the full range is in extension cords and reels.

Outdoor and jobsite use adds one more requirement: the cord must be rated for it. Damaged insulation on a wet site is a shock hazard, so inspect before each use and take damaged cords out of service rather than taping them. Where electrical contact is a live risk, see insulated electrical gloves and electrical hazard boots.

When is a battery power station the right answer?

Whenever the work is inside, and more often than people expect outside too.

A power station is a battery with an inverter. It produces no exhaust of any kind, which means it is the only source in this collection that can legitimately run in an enclosed or partially enclosed space — indoor finishing work, basements, occupied buildings, anywhere a generator is simply not an option. It is also silent, which matters on noise-restricted sites and in occupied premises.

The trade is real. Capacity is finite and measured in watt-hours, so when it is empty you recharge rather than refuel, and high-draw tools drain it fast. Check the continuous output rating against your largest load, not just the total capacity — a station with plenty of stored energy may still be unable to start a motor that demands a high surge. The range is in portable power stations.

How do the three sources compare?

The middle column is the one that decides most jobs. If the work is inside, the generator is out regardless of how many watts it makes.

What pairs with jobsite power?

Three things worth having alongside, because the equipment itself does not cover them.

A carbon monoxide monitor in any occupied space near a running generator. The generator's own shutoff protects the generator's surroundings; a monitor indoors protects the people. See CO detectors and best carbon monoxide detector.

Ground-fault protection. Temporary power on a construction site needs GFCI protection or an assured equipment grounding conductor program under OSHA 29 CFR 1926.404, which also covers temporary wiring generally.

Hearing protection near an open-frame generator, which is loud enough to matter over a full shift. Inverter models run considerably quieter, which is a genuine reason to choose one beyond fuel economy.

Editor's pick: decide by location before you compare specifications. If any part of the work is enclosed, start at portable power stations — it is the only category here that can go inside, and that constraint eliminates more options faster than any wattage comparison.

Affiliate disclosure: WC Safety is an independent review site. As an Amazon Associate we earn from qualifying purchases made through links on this page, at no extra cost to you. We do not sell products directly, and no brand paid for placement.

Our methodology: what is on this page, and what it cannot do

We counted this collection against the storefront rather than trusting the heading: 29 products that are exactly the union of the three child collections, with nothing outside them. We checked the CO shutoff claim in the page's own description against every generator's title and body rather than skimming titles — a title-only read would have suggested only two of eleven had the feature, and it would have been wrong. What we could not verify is certification: none of the listings states whether its shutoff meets ANSI/PGMA G300 or UL 2201, so we name the standards and tell you to check rather than implying the products carry them. We do not size cords or specify wattage for you, because both depend on the tools and distances on your job.

Jobsite Power FAQ

Can you run a portable generator in a garage with the door open?

No. A partially enclosed space still accumulates carbon monoxide, and open-door garage running is a recognized cause of fatal poisonings. Generators run outdoors only, well away from doors, windows and vents.

Does a CO shutoff make a generator safe indoors?

No. A shutoff reduces harm once CO has already built up — it is a backstop, not permission. It can fail, and it does nothing about the CO present when it trips. The outdoors-only rule is unchanged.

What is ANSI/PGMA G300 and UL 2201?

The two standards that define CO shutoff performance on portable generators. A generator certified to either has had its shutoff system tested rather than simply fitted. Look for the marking on the unit or in the manufacturer's specification.

Do all the generators here have CO shutoff?

Yes — all eleven describe an automatic CO shutoff. None of the listings states which standard it is certified to, so verify certification with the manufacturer if that matters to your procurement.

What gauge extension cord do I need?

It depends on amp draw and length together, not either alone. Gauge runs inverse — 12 AWG is thicker than 14 AWG — and voltage drop increases with length, so a cord adequate at 25 feet may be undersized at 100 feet for the same tool.

Why does an undersized extension cord matter?

Voltage drop starves the tool, so its motor draws more current, runs hotter and fails early — and the cord heats along its length, which is a fire risk. A coiled cord under load is worse because it cannot shed that heat.

Should I uncoil an extension cord before using it?

Yes, under any significant load. A coiled cord traps its own heat, and heat is what damages insulation and starts fires.

Can a portable power station run indoors?

Yes. A battery power station produces no exhaust, which makes it the only source in this collection that can legitimately run in an enclosed space. It is also silent.

What is the drawback of a power station versus a generator?

Finite capacity and surge limits. Stored energy is measured in watt-hours and you recharge rather than refuel, and a station with ample capacity may still be unable to start a motor demanding a high surge. Check continuous output against your largest load.

Does a jobsite need GFCI protection?

Construction sites need either GFCI protection or an assured equipment grounding conductor program under OSHA 1926.404, which also covers temporary wiring generally.

Do I need a CO monitor if my generator has a shutoff?

If a generator is running near any occupied space, yes. The generator's shutoff protects the area around the machine; a monitor inside protects the people.

How many products are in this collection?

29 — 11 generators, 10 extension cords and 8 portable power stations. Each also appears in its own child collection, all three linked above.

Full reference: Extension cord gauge chart — the sizing table behind every cord on this page.

Full reference: OSHA extension cord requirements — what an inspector checks on every cord and receptacle.

How this collection is organized

Searches for jobsite power and construction site power land on the comparison above, which is what a parent category is for. More specific intent belongs in the child collections: a jobsite extension cord by gauge and length in extension cords and reels, a portable generator co shutoff question in jobsite generators, and battery capacity in portable power stations. Every product on this page appears in exactly one of those three, so nothing is lost by starting there instead.

Why trust WC Safety on jobsite power?

WC Safety reviews workplace PPE full-time as an independent affiliate site — we do not sell products, hold no inventory, and accept no paid placements. The commercially useful version of this page leads with wattage. This one leads with location, because the carbon monoxide a generator produces rules it out of enclosed spaces entirely and that single constraint decides more purchases than any specification. It says plainly that an automatic CO shutoff — a feature every generator here carries and a genuinely valuable one — is a backstop rather than permission to run indoors, which is the misreading that gets people killed. It names ANSI/PGMA G300 and UL 2201 and then tells you that none of these listings states which one it meets, rather than letting a feature claim pass for a certification. And it points anyone with indoor work at the battery category instead of the more expensive generators. Standards referenced are OSHA 29 CFR 1926.404, ANSI/PGMA G300 and UL 2201. Reviewed by Steven Eaton, WC Safety editor. Last reviewed: July 2026.