How Long Will the Vtoman FlashSpeed 1500 Run a Space Heater?
Updated 2026-10-17 · Briefly
The numbers
| Battery capacity | 1548Wh (LFP) |
|---|---|
| Usable energy | 1316Wh (85% via AC outlets) |
| Continuous AC output | 1500W |
| Surge rating | 3000W |
| Space heater running watts | 1500W |
| Startup watts | 1500W |
| Average draw | 1500W |
| Estimated runtime | 53 minutes |
| Energy per day of typical use | 12 kWh |
1548Wh × 0.85 = 1316Wh usable ÷ 1500W average = 0.9 hours
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your space heater and enter its real wattage.
Recharging with solar
The Vtoman FlashSpeed 1500 accepts up to 400W of solar input. In real conditions that harvests about 1.5 kWh on a sunny day (5 peak-sun hours), or about 750Wh with one 200W panel.
Solar can’t fully keep up. A space heater uses about 12 kWh a day at 8 hours of use, more than the Vtoman FlashSpeed 1500’s best-case solar harvest. Solar will stretch the runtime but not sustain it.
Tips
- Space heaters are the hardest load for a battery: 1,500W of continuous heat. The low setting (usually 750W) doubles runtime.
- The Vtoman FlashSpeed 1500 uses LiFePO4 (LFP) cells, rated for thousands of cycles, so running it down daily won’t wear it out quickly.
Other power stations running a space heater
| Power station | Capacity | Output | Runtime | Verdict |
|---|---|---|---|---|
| Jackery Explorer 1000 Plus | 1264Wh | 2000W | 43 minutes | Briefly |
| Goal Zero Yeti 1500X | 1516Wh | 2000W | 52 minutes | Briefly |
| Jackery Explorer 1500 v2 | 1536Wh | 2000W | 52 minutes | Briefly |
| Jackery Explorer 2000 Plus | 2042Wh | 3000W | 1.2 hours | Yes |
| EcoFlow Delta 2 Max | 2048Wh | 2400W | 1.2 hours | Yes |
| Anker SOLIX F2000 | 2048Wh | 2400W | 1.2 hours | Yes |
| Bluetti AC200L | 2048Wh | 2400W | 1.2 hours | Yes |
| Bluetti AC200MAX | 2048Wh | 2200W | 1.2 hours | Yes |
FAQ
Will the Vtoman FlashSpeed 1500 run a space heater overnight?
No. At about 1500W average it runs out after 53 minutes. For a full night you need at least 14200Wh of capacity.
How long does the Vtoman FlashSpeed 1500 take to recharge with solar?
With its maximum 400W of solar input it refills in about 5.2 hours of strong sun. With a single 200W panel, expect about 2.1 sunny days (10 hours of full sun).