How long to charge rv battery with generator?

The time it takes to charge an RV battery with a generator depends on several factors:

1. Battery Capacity: The amp-hour (Ah) rating of your RV battery (e.g., 100Ah, 200Ah) determines how much energy it can store. Larger batteries take longer to charge.
2. Battery Type: Different battery chemistries (lead-acid, AGM, LiFePO4) charge at different rates:
   • Lead-Acid/AGM: Can be charged up to about 50%-80% relatively quickly, but topping off the remaining capacity takes longer.
   • LiFePO4: Charges faster and more efficiently, especially in the later stages.
3. Generator Output: The wattage or amperage of the generator's power output impacts the charging speed. For example:
   • A 2000W generator can typically power a charger up to 50-60 amps.
   • A smaller generator will deliver less power, slowing the charge rate.
4. Charger Amperage: The amperage rating of the battery charger affects how quickly it charges the battery. For example:
   • A 30A charger will charge faster than a 10A charger.
5. Battery State of Charge: A completely discharged battery will take longer than one that's partially charged.

Approximate Charging Times

• 100Ah Battery (50% Discharged):
  • 10A Charger: ~5 hours
  • 30A Charger: ~1.5 hours
• 200Ah Battery (50% Discharged):
  • 10A Charger: ~10 hours
  • 30A Charger: ~3 hours

Notes:

• To prevent overcharging, use a high-quality charger with a smart charge controller.
• Generators typically need to run at high RPM to maintain consistent output for the charger, so fuel consumption and noise are considerations.
• Always check the compatibility between your generator, charger, and battery to ensure safe charging.

Would you like to calculate a specific setup's charging time?