Pellet Stove Wattage for Generator Sizing
About the Pellet Stove
A pellet stove that burns compressed wood pellets for space heating. While the combustion provides the heat, the stove requires electricity to run the auger motor (feeding pellets), combustion fan, and distribution blower. The starting surge comes from the motors engaging. Pellet stoves are an efficient generator-powered heating option because the electrical draw is modest relative to the heat output. A small generator can run a pellet stove alongside essential loads, providing significant home heating.
Generator Sizing for a Pellet Stove
Running a pellet stove by itself requires a generator with at least 750 W of capacity (1 kW), which includes a 25% safety margin. However, you rarely run a single appliance on a generator. When combined with other appliances, the pellet stove contributes 400 W to the continuous running load and adds a potential 200 W starting surge gap when its motor starts.
The pellet stove is an inductive (motor-driven) load with a starting surge of 600 W, which is 1.5 times its running wattage. This starting surge occurs for a fraction of a second when the motor first engages and must overcome inertia to begin rotating. Your generator must be capable of delivering this peak wattage even though it only lasts briefly. If the pellet stove has the largest starting surge gap of any appliance in your generator load, its surge gap of 200 W will be the primary driver of your peak demand calculation. Avoid starting the pellet stove at the same time as other large motor loads to prevent generator overload.
To determine the total generator size you need, use our interactive calculator to combine the pellet stove with your other appliances. The calculator automatically handles the starting surge calculation and applies the 25% safety margin to give you an accurate recommendation. Alternatively, browse the scenarios below to see common generator setups that include the pellet stove.
Scenarios That Include Pellet Stove
The following pre-calculated generator scenarios include the pellet stove in their appliance list. Each scenario shows the total generator size needed for all appliances in the set, not just the pellet stove alone. Click any scenario to see the full appliance breakdown.
| Scenario | Total Appliances | Running Watts | Recommended Size |
|---|---|---|---|
| Pellet Stove Heating System | 6 | 1,695 W | 4 kW |
Tips for Running a Pellet Stove on a Generator
When running the pellet stove on a generator, the most important consideration is the starting surge. Before starting the pellet stove, check that no other large motor-driven appliances are starting simultaneously. Stagger your startups: let the pellet stove reach steady-state operation (usually within 1-2 seconds) before starting the next motor load.
If the generator struggles to start the pellet stove (indicated by the generator bogging down, lights dimming significantly, or the appliance failing to start), it likely means the generator's peak surge capacity is insufficient. Try reducing other loads before attempting to start the pellet stove again. If the problem persists, you may need a larger generator with more surge capacity.
Modern inverter generators handle motor starting surges particularly well due to their electronic power management. If you are purchasing a new generator specifically for loads that include the pellet stove, verify that the generator's peak (starting) wattage specification meets or exceeds the 600 W starting requirement plus the running wattage of all other connected appliances.
Pellet Stove Wattage Compared to Similar Appliances
The following table compares the pellet stove to other appliances in the hvac & climate category. Understanding relative power requirements helps you make informed decisions about which appliances to prioritize on your generator and where you might find opportunities to reduce your total load.
| Appliance | Running Watts | Starting Watts |
|---|---|---|
| Pellet Stove (this appliance) | 400 W | 600 W |
| Central Air Conditioner (3-Ton) | 3,500 W | 4,500 W |
| Window AC Unit (5,000 BTU) | 500 W | 600 W |
| Window AC Unit (10,000 BTU) | 1,200 W | 1,500 W |
| Portable Space Heater | 1,500 W | — |
| Furnace Blower Fan | 800 W | 1,300 W |
| Whole House Fan | 500 W | 800 W |
Frequently Asked Questions
How many watts does a pellet stove use?
A pellet stove uses approximately 400 watts of continuous (running) power during normal operation. It also requires 600 watts of starting (surge) power when the motor first turns on, which is 1.5 times the running wattage. This starting surge lasts only a fraction of a second but your generator must be capable of delivering it.
What size generator do I need to run a pellet stove?
To run a pellet stove by itself, you need a generator rated for at least 750 W (1 kW), which includes a 25% safety margin above the starting wattage of 600W. However, most people run additional appliances alongside the pellet stove, so your actual generator needs will be higher. Use our calculator to add your other appliances and get a comprehensive recommendation.
Can I run a pellet stove on an inverter generator?
Yes, a pellet stove can run on an inverter generator as long as the generator's peak (starting) wattage capacity meets or exceeds 600 watts. Inverter generators handle motor starting surges well and provide clean power that is safe for the electronic controls found in many modern pellet stove models. Verify the inverter generator's surge rating in the specifications.