THE GENERATORCALC FIELD GUIDE
Generator Sizing & Backup Power Guides
Generator sizing guides built on our free generator calculators: appliance watts, RV setups, outage planning and finding the generator size that fits.
Latest guides
Practical answers. Clear next steps.Appliances and equipment 5 min read
Dishwasher Wattage and Generator Requirements
The reviewed dataset gives a typical dishwasher running demand of 1,800 W range 1,200–2,400 W and starting demand of 1,800 W range 1,200–2,400 W. For one dishwasher by itself, the registered planning check calls for 2,250 W running, 1,800 W starting. Running capability is the decisive constraint…
Appliances and equipment 4 min read
How Many Watts Does a 50-Pint Dehumidifier Use?
For the 50-pint dehumidifier represented in this dataset, use 562 W range 530–650 W for running power and 1,180 W range unknown–1,950 W for startup planning. These are low-confidence planning estimates for one class of 120 V motorized dehumidifier. They are not measurements or specifications for…
Appliances and equipment 5 min read
CPAP Power Consumption With a Humidifier
The reviewed dataset lists one CPAP machine with humidifier at 90 W range 30–120 W while running. Its supplied starting-power figure is also 90 W range 30–120 W. These are low-confidence planning values, not specifications or measurements for a particular machine. No nightly or daily energy figur…
Appliances and equipment 5 min read
Coffee Maker Wattage and One-Appliance Generator Check
For one household drip coffee maker, the reviewed dataset supplies running power of 600 W range 600–1,750 W. Its supplied starting value is 600 W range 600–1,750 W. For the registered 600 W default, the one-appliance planning result is 750 W running, 600 W starting. Use this only as a planning re…
Appliances and equipment 5 min read
Chest Freezer Running and Starting Wattage
For preliminary planning, the reviewed dataset gives one chest freezer a typical running demand of 500 W range 100–700 W and a typical startup demand of 1,250 W range 500–2,900 W. Running watts apply while the compressor is operating. Starting watts are the brief, higher demand when the compresso…
Appliances and equipment 6 min read
Central Air Conditioner Running and Starting Watts
For planning, the registered dataset covers one conventional 240 V central air conditioner in each of five size classes: 2, 2.5, 3, 4, and 5 tons. The typical running values span 2,250 W for the 2-ton class to 5,750 W for the 5-ton class. Typical starting values span 4,000 W to 9,000 W. | Central…
Home backup 6 min read
What Size Generator Do I Need for a Gas Furnace?
For this whole-furnace winter-outage example, use 1,475 W of running capacity and 2,880 W of AC starting capability as the initial generator-rating screen. The starting figure is larger because the model starts the furnace blower while the other scheduled loads are already operating. These figure…
Camping and outdoor 7 min read
48-Hour Hunting Camp Power Plan
For the registered base schedule, plan for 6.18 kWh over 48 h of energy. Scheduled loads reach 1,445 W, and the scenario-specific running-capacity target is 1,806 W. The modeled one-motor-start estimate is 2,045 W. For demand-side planning, keep the pre-cooled chest freezer and mini fridge availa…
Appliances and equipment 5 min read
Well Pump Running and Starting Wattage
This lookup covers 1/2, 3/4 and 1 HP well pumps rated at 240 V. The values are planning typicals from the reviewed BGT 1.2.2 dataset, not specifications for every pump with the same horsepower. | Pump size | Running power | Starting power | Confidence | |---|---:|---:|---| | 1/2 HP | 875 W range…
RV power 6 min read
Charging RV Batteries With a Generator
A generator does not usually charge an RV battery directly. It supplies AC power to the RV’s converter/charger or a separate battery charger, and that device controls the DC power delivered to the battery. The practical check is whether the generator can support the charger’s AC input demand plus…
Appliances and equipment 5 min read
Refrigerator Energy vs Running Watts
Use kWh per day or year when comparing energy consumed over time. Use running and starting watts when checking whether a generator, inverter, or portable power station can operate the refrigerator. An annual energy figure cannot establish either watt requirement.
Camping and outdoor 7 min read
What Can a 2,000 Watt Generator Run?
A 2,000 W generator label is not enough by itself to confirm what the generator can run. We must know whether that number is the continuous running rating or only the peak starting rating. - If 2,000 W is the running rating: 29 of the reviewed appliance profiles are within the modeled check, 8 ex…