Hi Angela,

 My name is Brad Coats. I'm sorry that Steve can't respond to your question but I'll try my best to help.

Sentry does have a 32 VDC charger that can charge up to three banks and can turn off when batteries reach full charge.  I understand that the banks will be under different loads. That is almost always the case with multiple banks on one charger.  Sentry charges do have the feature allowing them to completely turn off when the banks reach full charge. The type of transformer used in the Sentry charger reduces the amperage output on each bank its connected to as the voltage nears the cut out point. So even when the charger is running to keep the house bank up, the starting bank is getting very little charge.

This charger will work with lead acid or Gel cell batteries. The difference between lead acid and other (closed cell) batteries is… how high do you charge them before cutting off the charger.  The good thing about Sentry is that no matter what the charging requirements are for the batteries you get, the control circuit board can be calibrated to shut the charger off at whatever the battery manufacturer recommends.  The 32 VDC  chargers are available in 30 amps which should be fine for a 58' Hatt. with a house and starting bank.  

If I had to use one word for these chargers it would be that they are almost bullet proof. In the nearly 18 years I have serviced Cruisair / Sentry products, I have spent very little time working on these chargers. A charging board here, a blocking diode  there, maybe a cooling fan…. the point is they can be repaired easily if, and I do mean IF, they fail…

Product # 708010014    FR3230/3x

I hope this helps, if you have any other questions please feel free to ask.   :  )