We sometimes leave our boat out of the water for 1-3 months at a time (in the dry store), rather than heaving the heavy batteries out of the boat to store in small apartment, we would like to trickle charge them with solar.
Now the question is, can I leave a BlueSolar PWM-Light 10A connected permanently with a 20 Watt solar panel, to trickle charge the battery? (similar to the "maintenance/wintering" chargers that can be found for cars - these are 230 V / 12V)
As far as I know the PWM Light has a fixed charge regime, of Bulk, Absorption, Float. Would it be suitable for the 12V Deep Cycle (maintenance free / sealed and have 140 Ah) Lead Acid batteries on board the boat? It is two sets of batteries (which are not physically connected), so likely would need two chargers and two panels?
The charge cycle completes and then restarts and after two hours of Absorption, it switches to float.
In short, can this be done, or if not could somebody suggest a simple / affordable system that can be used for this purpose.
Many thanks and best regards,