What size generator for a truck camper?
Check, uncheck or adjust the typical device list below — watts, startup surge and battery size update instantly. Numbers come from U.S. DOE, ENERGY STAR and manufacturer spec sheets, not marketing copy.
1. Check what you need to power
Refrigeration & Freezers
Kitchen
Heating, Cooling & Fans
Water & Pumps
Laundry & Cleaning
Electronics & Office
- 1
Medical Devices
Power Tools & Outdoor
Lighting
- 2
2. Your sizing
3. Best cross-brand matches
- Goal Zero Yeti 3000X~$3,000
- surge 3,500W covers your 2,196W start peak
- 1.0 days of your typical daily use (3,032Wh / 2,950Wh)
- Anker SOLIX F3800
- surge 9,000W covers your 2,196W start peak
- 1.3 days of your typical daily use (3,840Wh / 2,950Wh)
- EcoFlow DELTA Pro 3~$2,799
- surge 8,000W covers your 2,196W start peak
- 1.4 days of your typical daily use (4,096Wh / 2,950Wh)
Static answer (crawlable summary)
Typical device list: Portable 12V Fridge/Freezer (Dometic CFX3 45 class)×1, LED Bulb (60W equivalent)×2, Phone / Smartphone Charger×2, Induction Cooktop (portable single burner)×1, Laptop Computer×1.
| Continuous load | 1,996 W |
|---|---|
| Startup peak | 2,196 W (driven by 1× Portable 12V Fridge/Freezer (Dometic CFX3 45 class)) |
| Daily energy use | 2,950 Wh |
| Recommended capacity | 3,690 Wh (25% margin included) |
| Minimum inverter | 2,200 W continuous |
Frequently asked questions
What size generator for a truck camper?
For a typical setup (portable 12v fridge/freezer (dometic cfx3 45 class), led bulb (60w equivalent), phone / smartphone charger, induction cooktop (portable single burner) and laptop computer), you need at least 1,996W of continuous power. The single biggest moment is startup: when 1× portable 12v fridge/freezer (dometic cfx3 45 class) kicks on, the momentary draw peaks at 2,196W. For overnight runtime we recommend at least 3,690Wh of battery capacity (your devices use about 2,950Wh per day, plus a 25% margin).
Which power stations can handle this?
Based on published specs, Goal Zero Yeti 3000X, Anker SOLIX F3800, EcoFlow DELTA Pro 3 all cover the 2,196W startup peak and give you 1.0 days / 1.3 days / 1.4 days of typical daily use. Check the comparison cards above for the full numbers.
Why is the startup surge higher than the running watts?
Motor-driven devices (fridge compressors, well pumps, air conditioners) draw 2-5× their running power for a split second at startup — measured as locked-rotor amps (LRA). A generator that only meets the running load will trip or stall when the biggest motor starts. Our data sources: U.S. DOE Energy Saver, ENERGY STAR certified product database, and manufacturer spec sheets (Franklin Electric, Goodman, Zoeller).