Solar Panel Efficiency

[AllanG]

To help to keep my 2x 75Ah batteries charged whilst my Finnmaster 61 CA motorboat is ashore on the dry stack, I'm considering using one of the new SP Solbianflex Series AllinOne 23 W solar panels, which has an integrated charge controller, that I saw on the Barden stand at SIBs.

http://www.barden-ukshop.com/new--solbian-allinone-series-431-c.asp

As I don't want to permanently externally mount the panel, it would be my intention to prop it up against the inside of one of my windscreen glasses, with crocodile clips to my domestic battery which would allow me to easily remove and stow it when using the boat.

As both my domestic and starter batteries are connected via separate BEP isolation switches, and a BEP VSR, the solar panel would then charge both batteries via the VSR.

As I have very limited experience of solar panels, can anyone tell me if my proposal is feasible and, if so, what sort of efficiency could I expect out of the panel?

Thanks in advance.

Allan

 

[wipe_out]

Don't know about efficiency but I use a typical aluminium frame 20w panel and a dual battery charge controller (think the whole lot including cables and clips was less than £100) to charge my engine, domestic and bow thruster (via VSR) batteries.. I had the panel in the windscreen of my Merry Fisher where it got good sun through the morning and less in the afternoon.. It worked perfectly and kept all the batteries full..