Upgrade old Magnatek converter or replace?

Chris Bryant wrote:
Owners Manual

Forum is being broken- trying to quote from that, but look at the optional TempAssure module, which I assume Airstream would include, given that they don't really give those things away :)

Parallax 8300 manual wrote:
TempAssure™ (Patent US 7,245,109)

Your 8300 system may include the (optional) TempAssure™ module and sensor
cable. When properly installed, the TempAssure™ system employs technology that
allows the output voltage of the converter to be varied by the temperature of the RV’s
“house” battery system. The benefit of this feature helps to provide a more appropriate
charging voltage for the “house” battery system exposed to varying ambient
temperatures. For example, in cold climates the output voltage of the converter will be
increased, which results in a more fully charged and maintained battery. In hot climates
the output voltage of the converter will automatically lower, which will aid in reducing
excessive out-gassing of the battery caused by the battery requiring a lower “float”
voltage.
Also with the addition of the TempAssure™ module and sensor cable, the 8300 series
converter will automatically start out in a “boost” mode for the first 4 hours of operation
every time the 8300 series converter is powered “on”. The output voltage of a
TempAssure™ equipped 8300 series converter will still be temperature compensated,
even while in “boost” mode.
Your RV manufacturer’s installation may also allow you to manually trigger the “boost”
function by pressing a switch. (optional wiring configuration)
While the 8300 series converter with the addition of the (optional) TempAssure™
module is designed to provide a better means of charging and maintaining the “house”
battery, Parallax Power Supply strongly recommends proper battery maintenance be
performed by the owner on non-maintenance free batteries following the battery
manufacturer’s recommendations.
DO NOT allow the battery cell plates on non-maintenance free batteries to become
exposed to the air. Poor battery performance will result.
Parallax Power Supply will not be responsible for battery failure resulting from improper
battery maintenance.