Gas furnace blower 1/2 HP: how much battery you need
Gas furnace blower 1/2 HP draws about 550 W (300–800 W range), runs 50% of the time and uses 6600 Wh per day. Start-up surge: 1600 W.
A gas furnace burns no electricity for heat, but its blower and controls stop in an outage; the blower is the load to plan for. Champion lists 300–800 W running; we use the middle for energy and the top starting figure (1600 W) for the peak.
Battery needed
| Hours | Wh | Battery (Wh) | Inverter (W) |
|---|---|---|---|
| For 8 hours | 2200 | 3334 | 605 / 1600 |
| For 24 hours | 6600 | 10000 | 605 / 1600 |
| For 72 hours | 19800 | 30000 | 605 / 1600 |
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Stations that fit (24 h)
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FAQ
How many watts does a Gas furnace blower 1/2 HP use?
Typically 550 W while running, with a range of 300–800 W depending on model and age. Start-up surge can reach 1600 W.
How long will a 1000 Wh power station run a Gas furnace blower 1/2 HP?
About 2.4 hours on the clock, allowing for the 50% duty cycle, inverter losses and a 20% reserve.
What size power station do I need for a Gas furnace blower 1/2 HP overnight (8 h)?
About 3334 Wh of battery and an inverter rated at least 605 W continuous with 1600 W surge.
Can I run a Gas furnace blower 1/2 HP on solar during an outage?
You need roughly 4400 W of panels in winter to replace a day's use (6600 Wh), charging through a station with a big enough MPPT input.
Other sizes
Other appliances
1 Approximate values: estimated from motor or heater power and typical figures published online, not from a manufacturer chart. Check your appliance label.
Inverter efficiency 88%, usable depth of discharge 90%, reserve 20%. Full method: How we calculate. source