The size of the generator needed to charge an RV battery depends on a few factors:
1. Battery Type and Capacity
The battery capacity is measured in amp-hours (Ah). Typical RV battery banks range from 100Ah to 300Ah or more for larger rigs.
2. Battery State of Charge
How depleted the batteries are will determine how much charge needs to be replenished. Recharging from 50% state of charge requires less generator runtime than a full recharge from 20%.
3. Generator Output
Most portable generators for RVs produce between 2000-4000 watts. The higher the wattage output, the faster the charging rate.
As a general guideline:
- For a typical 100-200Ah battery bank, a 2000 watt generator can recharge in 4-8 hours from 50% charge.
- For larger 300Ah+ banks, a 3000-4000 watt generator is recommended for reasonably fast charging times.
The generator should have enough output to run the charger/inverter plus any other AC loads like the refrigerator during charging. Running time will also depend on generator fuel tank capacity.
It's best to consult your specific battery and RV electrical specifications to determine the ideal generator size for efficient charging without overloading the generator.
Post time: Mar-25-2024
