What size generator do i need for a 50 amp rv?
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
- 1
Heating, Cooling & Fans
Water & Pumps
Laundry & Cleaning
- 1
Electronics & Office
- 1
Medical Devices
Power Tools & Outdoor
Lighting
- 5
2. Your sizing
3. Best cross-brand matches
No single portable power station covers this load — look at expandable systems (e.g., EcoFlow DELTA Pro 3 + extra battery, Anker SOLIX F3800 expansion packs) or a fixed home battery instead.
Static answer (crawlable summary)
Typical device list: RV Rooftop AC (13,500 BTU)×2, Microwave Oven×1, Induction Cooktop (portable single burner)×1, Hair Dryer×1, Portable 12V Fridge/Freezer (Dometic CFX3 45 class)×1, TV (43-inch LED)×1, Router + Modem×1, Starlink Standard (Gen 3)×1, LED Bulb (60W equivalent)×5, Phone / Smartphone Charger×3.
| Continuous load | 8,263 W |
|---|---|
| Startup peak | 19,063 W (driven by 2× RV Rooftop AC (13,500 BTU)) |
| Daily energy use | 34,840 Wh |
| Recommended capacity | 43,550 Wh (25% margin included) |
| Minimum inverter | 9,090 W continuous |
Frequently asked questions
What size generator do i need for a 50 amp rv?
For a typical setup (rv rooftop ac (13,500 btu), microwave oven, induction cooktop (portable single burner), hair dryer and portable 12v fridge/freezer (dometic cfx3 45 class)), you need at least 8,263W of continuous power. The single biggest moment is startup: when 2× rv rooftop ac (13,500 btu) kicks on, the momentary draw peaks at 19,063W. For overnight runtime we recommend at least 43,550Wh of battery capacity (your devices use about 34,840Wh per day, plus a 25% margin).
Which power stations can handle this?
Look for a station whose surge rating covers 19,063W and whose capacity is at least 43,550Wh.
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).