charging from genset

[terraplane]

I anticipate being in a slip this season without shorepower electricity. If i want to occasionally charge my batteries (R 25 with standard battery configuration and Mase Gen)...how long would i have to run the generator to get a charge?

terraplane

 

[henrym]

That depends upon how many Amp Hours have been removed from the battery (s) and how many Amps per hour the battery charger is allocating to that battery (s). An Amp Hour (AH) is a rating usually found on deep cycle batteries. If a battery is rated at 100 amp hours it should deliver 5 amps for 20 hours, 20 amps for 5 hours, etc. Having a 20 amp hour battery charger feeding three banks of batteries that have been depleted collectively of 100 amps would take 5 hours under ideal conditions to fully charge the batteries. Batteries will deteriorate over time and require additional charging to get them charged up, however they will never get back to their full original advertised potential Amp hour output capacity. A battery hydrometer will tell you what the charge condition is in a battery while it is being charged. The volt meter at the helm will not give you a indication of the charge on a battery while the battery charger is in operation.
Henry

 

[captain's cat]

I anticipate being in a slip this season without shorepower electricity. If i want to occasionally charge my batteries (R 25 with standard battery configuration and Mase Gen)...how long would i have to run the generator to get a charge?

terraplane

Tom, sounds like a trip to the Inner Harbor for lunch would just about do the trick!! You wouldn't even have to run the genset then! :idea: 😀

charlie

 

[CaptMac]

I leave Island Ranger in a slip, but do not connect shorepower (except in the winter - for a dehumidifier). As long as you use your boat periodically, and the only use of the batteries is the bilge pump for rain water, you shouldn't need to worry about it.

If you come down, and use lighting, etc without running the engine, then yup, you'll have to re-charge.

The Yanmar 110 has an 80 amp-hr charger, so it tops up the batteries pretty quickly (when the engine is running at high rpms. It doesn't recharge much when idling!


mac