Generators
Dual Fuel vs Tri Fuel Generators: Which Makes Sense for Home Backup
A third fuel option adds a supply route, but its power rating still matters. Compare documented output losses and the storage or service conditions behind each option.
WattBackup — home backup power, sized with real numbers
Outage Prep
Well Water and Power Outages: How to Get Water Without a Pump
Stored water, a compatible hand pump and an approved electrical backup solve different parts of a well-water outage. See how much to store and which conditions matter before relying on the well.
Power Stations
UPS vs Portable Power Station for Home Office Backup
Nine of the first ten results are written by someone selling one of the answers. The number that settles it is in Intel's ATX design guide: 16 ms of PWR_OK hold-up.
Appliance Power
How Many Watts Does a Refrigerator Use? Running, Starting and Yearly Cost
A refrigerator does not have a wattage. It has four, they differ by a factor of 88, and each is the honest answer to a different question.
Generators
Interlock Kit vs Transfer Switch: Cost, Code Compliance and Install Time
Two installation prices can cover different work. See how panel-specific compatibility, permit exclusions and documented site-time estimates change the comparison.
Outage Prep
How to Keep Your House Warm During a Winter Power Outage
Retaining heat, powering a compatible system and finding somewhere heated are different parts of the plan. See the electrical limits before relying on a battery or a furnace blower calculation.
Power Stations
How to Recharge a Power Station During a Multi-Day Outage
Every page on this answers solar panels and stops. Five manufacturers publish the figures that decide it: a solar input ceiling that varies five and a half times, a refill quoted in hours of sunlight rather than hours, and a wall charger whose speed was decided when you bought the box.
Appliance Power
How Much Electricity Does a Chest Freezer Use per Month in Dollars?
A chest freezer is the rare appliance with a precise answer: it runs continuously, its consumption is certified rather than estimated, and the entire certified market is nine models. Three things move the number more than which one you buy.
Generators
Generator Backfeeding: Why It Is Dangerous and Never Worth It
A household output rating does not describe the hazard on an unintentionally energized utility line. Understand the documented risks and the isolation requirements to discuss with a licensed electrician.
Outage Prep
How Long Do Power Outages Usually Last? US Utility Data by State
The question hides two different ones. A single interruption averages just over two hours in normal operation and 7.2 hours once storms are counted, while the whole year came to 11 hours per customer in 2024.
Power Stations
Can You Use a Power Station Indoors? Ventilation and Safety Explained
Every page answers this with zero emissions and a six-inch rule. We opened four manuals instead: two say the device is for indoor use only, and the only clearance figure anyone publishes is 30 cm, in a troubleshooting table.
Appliance Power
How Much Does It Cost to Run a Space Heater for 8 Hours? US and UK Rates
The sum is the easiest on this site: eight hours at 1,500 W is 12 kWh. Everything hard is in the second number.
Generators
Inverter Generator vs Conventional Generator: Noise, Fuel and Sensitive Electronics
A noise rating needs its test distance, and a runtime claim needs its actual load. Compare documented examples without mistaking different test conditions for guaranteed fuel savings.
Outage Prep
Power Outage Checklist: What to Do in the First 60 Minutes
Most outage checklists have no clock on them. This one does: about four hours of refrigerator, 24 to 48 of freezer, and the federal reliability data that says an average US customer lost 11 hours to outages in 2024, nearly nine of them to storms.
Power Stations
How Long Does a Portable Power Station Last? Cycles, Calendar Ageing and Warranties
Cycles are the wrong unit for a machine that spends its life switched off in a cupboard. At one cycle a month even the worst rating here is forty-two years, and the only commitment anyone makes is two to five.
Appliance Power
How Many Watts Does a Coffee Maker Use?
A drip machine is three appliances in sequence: a kettle, a hotplate and a clock. Only one maker publishes all three numbers, and reading the European model against the American one turns up a timer set by law rather than by engineering.
Generators
How Far Should a Generator Be From the House? CO Safety Distances
Portable CO guidance and fire clearances answer different questions. See what each distance measures and why standby wall spacing needs a professional assessment.
Power Stations
Do Portable Power Stations Work in Freezing Temperatures?
Using one below freezing and recharging one below freezing are different questions with different answers. Four manufacturer specification pages, and the charging floor does not move.
Appliance Power
How Many Watts Does a Microwave Use? Input Watts vs Cooking Watts
The number on the door is cooking output, measured in a laboratory. The plug draws more - but how much more depends on who made it.
Generators
Do You Need a Transfer Switch for a Portable Generator?
An inlet, an interlock and a transfer switch perform different jobs. See which connection your household loads need and what an installation quote should include.
Power Stations
LiFePO4 vs NMC Power Stations: Cycle Life, Weight and Cold Weather
Everything written about these chemistries is written about cells and then applied to products. Taken to three manufacturer specification pages, all three of the usual conclusions come apart.
Appliance Power
How Many Watts Does a Wi-Fi Router and Modem Use?
Nobody prints a wattage on a router, so we took the 374 named models the American broadband industry reports every year and worked out the medians. The box your provider rents you is the one that costs you money.
Generators
How Long Can You Safely Run a Generator Continuously?
A full tank does not mean you can skip an oil check or service stop. Compare the separate fuel, inspection and maintenance clocks in manufacturer documents.
Power Stations
Pure Sine Wave vs Modified Sine Wave: Which Appliances Actually Care
The lists of what modified sine wave breaks are usually unsourced. We read what three inverter manufacturers put in their own manuals, and the interesting thing is how little the lists overlap.
Appliance Power
How Many Watts Does a CPAP Machine Use Overnight?
One of the smallest loads on this site and one of the most anxiously searched. ResMed publishes current draw for every humidifier setting, and the humidifier turns out to be the whole story: 11 watts becomes 59.
Generators
How Much Fuel Does a Generator Use per Hour? Gasoline, Propane and Diesel
Every page answers this with one number, and one number cannot answer it. A 10 kW standby burns 0.97 gal/h of propane at half load and 1.48 at full load, and going from half to full costs 1.5 to 1.8 times the fuel, not twice.
Power Stations
How Long Will a 500Wh Power Station Run a CPAP?
Three defensible answers sit behind this question and most pages pick one without saying which. The one written by the people who built the machine says 720 Wh, which this tier does not reach.
Appliance Power
How Many Watts Does a Window Air Conditioner Use per Hour?
Every certified model publishes the answer, but not in watts: it is hidden in a number called CEER. All 438 certified window units pulled apart by size, plus the finding that every single one now has a variable-speed compressor.
Generators
What Size Generator to Run a Refrigerator, Freezer and Furnace at Once?
The first page recommends a 6,000 to 8,000 W generator, and the figure carrying that recommendation costs a gas furnace as if it were an electric heater. The two loads anybody publishes come to 575 W.
Power Stations
Can a Power Station Run a Sump Pump? Surge Watts Explained
The starting figure every page quotes comes from a rule of thumb. The one manufacturer that publishes locked rotor amps disagrees with it on every pump in its catalogue, and by most on the smallest.
Appliance Power
How Many Watts Does a Space Heater Use? 750W vs 1500W Compared
The one appliance whose label you can trust, because a resistance heater has no power factor. What each setting costs an hour, why no space heater is more efficient than another, and why 1,500 W is close to the worst thing you can attach to a battery.
Generators
What Size Generator Do I Need? Sizing by House Size, Loads and Budget
Every result on page one is a calculator, they contradict each other on the only rule that matters, and none asks your elevation. Generac settles the rule in its own manual and publishes the derating in the same table as the wattage: 3.5 per cent for every thousand feet.
Power Stations
Will a Portable Power Station Run a Refrigerator Overnight?
The certified rating every runtime calculator uses is measured with the ice maker switched off. NIST measured one running, and at 1,000 Wh it decides whether a twelve-hour night is covered at all.
Appliance Power
How Many Watts Does a Chest Freezer Use per Day?
One of the few questions with an exact answer, because every freezer carries a certified annual figure. All nine certified chest freezers listed, what each costs a month, and the USDA rule that means for the first 48 hours of an outage a full one needs no power at all.
Power Stations
What Can a 2000Wh Power Station Run? Real Appliance Runtimes
Doubling the battery doubles the runtime exactly, which is the least interesting thing about this tier. What changes is the surge rating, and whether the total covers the outage the EIA says Americans actually get.
Appliance Power
How Many Watts Does a Gas Furnace Blower Use During a Power Outage?
The gas costs you nothing electrically; the blower is the whole problem. Trane publishes a full grid of watts against speed setting and duct resistance, and it spans eighteen to one, which is why every single-number answer to this question is wrong.
Power Stations
What Can a 1000Wh Power Station Actually Run? Runtime Table by Appliance
About 800 Wh of a 1,000 Wh station reaches an AC load: 97 hours of a router, 15 of a refrigerator, 32 minutes of a space heater. What it will run at all is decided by the inverter, and three units sold as 1000Wh ship inverters of 1,000, 1,500 and 2,000 W.
Appliance Power
How Many Watts Does a Well Pump Use? 1/2 HP vs 3/4 HP vs 1 HP
Franklin Electric publishes the input watts for every submersible motor it makes, so this figure does not have to be guessed. The published numbers, the service factor ceiling nobody quotes, and the locked rotor figure that decides whether your backup equipment works at all.
Power Stations
Power Station Capacity Explained: Wh, Ah and Why Usable Capacity Is Lower
Amp-hours are not a measure of capacity. One manufacturer rates a single kilowatt-hour battery at both 19.5 Ah and 312 Ah, and both are correct.
Appliance Power
How Many Watts Does a Sump Pump Use (and What Backup Size It Needs)
Every chart says 800 watts running and up to 2,900 starting, and none of them says where the number came from. The manufacturers own engineering sheets publish amps and locked rotor amps instead, and the real figures are lower and more precise.
Power Stations
Portable Power Station Sizing Guide: From 300Wh to 5kWh by Household Need
Watts decide whether an appliance starts at all; watt-hours decide how long it runs. This guide sizes a station from sixteen verified appliance articles rather than from runtime claims, and shows why a rated 1,024 Wh delivers about 580 Wh to a small AC load.
Appliance Power
How to Find the Real Wattage of an Appliance From Its Label
The nameplate is the one wattage figure that belongs to your actual appliance rather than to an average. Where to find it, what every symbol means, and why multiplying volts by amps is wrong for anything with a motor.
Appliance Power
Starting Watts vs Running Watts: What the Difference Costs You When Buying Backup Power
Every manufacturer blog defines the two terms. None of them price the mistake.
Appliance Power
Appliance Wattage Chart: 60 Household Devices With Running and Surge Watts
Every backup power decision starts with an appliance wattage chart. Before you size a generator, a battery or a portable power station, you need two numbers for each load you want to keep alive.