Split charging from solar cell

My engine is a Yanmar GM10 with an alternator fitted with a sterling
regulator and diode splitter for 50 ah engine and 85 ah service batteries.

I have a 20 watt solar panel which is connected to the engine battery via a
Phocos smart solar power regulator with a total of 3 pairs of terminals, for
solar panel, battery and load (which will isolate itself in the event of low
voltage to save the battery) This has easily maintained the engine battery
very well so far and I would now like to include the service battery.

Is there a way I can connect the solar regulator to charge both batteries
using a new separate splitter say from maplin? Or could I connect the smart
solar regulator to the alternator side of the Sterling unit? I am unclear
about either of these options as the smart "Phocos" unit would need to "see"
the individual battery voltages in order to determine its control actions.
Or maybe I just have to bite the bullet and buy a new solar regulator with a
split charger combined? TIA

ChrisR





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