Robb,
Like Charlie above, we have the unit by Progressive Dynamics, actually an Intelipower PD9280 which is rated for 80A. It has the "smart" charger built in with the following modes:
NORMAL - Output voltage set at 13.6 volts DC. This voltage provides good charging rates and low water usage.
BOOST MODE - If the converter senses that the battery voltage has dropped below a preset leverl the output voltrage is increaded to 14.4 volts DC to rapidly recharge the batteries.
STORAGE MODE - When the converter senses that there has been no significant battery usage for approximately 30 hours trhe output voltage is reduced to 13.2 volts DC for minimal water usage.
EQUALIZATION MODE - (subset of STORAGE MODE) When in storage mode the microprocessor automatically increases the output voltage to 14.4 volts for 15 minutes every 21 hours. This will help to reduce the buildup of sulfation on the battery plates.
This info from Progressive.
Jerry
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