Getting to that magic 14.8 v with an RV Charge Controller

Yes, some converters can get to 14.8V. The Boondocker and Iota are two converters that output rated current until the absorption voltage is reached. Iota absorption is at 14.8V.

Before you do anything else, test the performance of the PD. Purchase a 200A panel meter like this:

200A panel meter

200A, 75mV shunt200A, 75mV shunt

Discharge battery to about 50%. Start converter and measure Vbat and charging current. If you have another meter then measure voltage directly at the output of the PD. If you can assemble all meters in one location then you can record a video of the measurements. Otherwise record measurements with a time base. First record every minute (for first 5 min), then every 5 min (until the half hour mark), then every 15 min.

Graph data in a x-y scattery Excel file.

Here's the 55A Iota charging 2 GC2.

Wet Coast wrote:
you don't think the 14.8 can be achieved with the newer solid state technology chargers?