If your RV setup uses a sump system at a fixed location, include high startup surge and storm-day runtime in planning.
For full system planning, use the WattSizing Calculator.
Quick Answer
Sump pumps commonly run at 500 to 1,500 watts with high inrush. Daily kWh can stay small on dry days and jump during storms.
RV Context
This is less about mobile RV loads and more about site drainage resilience where power interruptions can coincide with heavy rain.
Typical Ranges
| Pump Size | Running Watts | Starting Watts | Typical RV-Site kWh/day |
|---|---|---|---|
| 1/3 HP | 500 - 800 W | 1,200 - 2,200 W | 0.1 - 1.5 |
| 1/2 HP | 700 - 1,100 W | 1,600 - 3,000 W | 0.2 - 2.3 |
| 3/4 HP | 900 - 1,400 W | 2,200 - 3,800 W | 0.4 - 3.4 |
Practical Example
A 1/3 HP sump pump at 650 W for 80 minutes/day uses 0.87 kWh/day.
FAQs
Is this a common RV load?
Mostly at long-stay or fixed-site setups with drainage systems.
Can portable generators run it?
Often yes, if surge capacity is adequate.
Should I include weather margin?
Definitely, since storm conditions drive runtime.
CTA
Ready to size your setup accurately? Use the WattSizing Calculator to estimate panel, battery, and inverter requirements from your real appliance loads.
