Originally Posted by senormechanico
On a boat, one of the main factors should be watts per sq foot, not $ per watt.
The structure to hold them, the weight and the area covered are all bigger factors than on land.
Getting the most efficient panels may actually be cheaper if you don't have to build a huge array.
You are 100% correct.
I missed the $1.98/watt special for 130 watt panels at Sun Electric but caught the 205 watt special at the same price. Now the price is occasionally lower. The shipping
adds to the price so if you can pickup you really save.
Real Estate which means watt/ft is very important as is having more than one panel. I went with 2 panels which I will mount on the bimini
. My boom is forward of the bimini
so backstay is the only potential shade if I face the right way. I am also installing a MPPT
controller to get back much of the losses 20-40% losses due to panel-battery mismatch.
As the 2 panels take 30+ sq ft on my bimini which is all of my space, I can't afford the losses from a real estate perspective alone. There is also the cost aspect.
Solar panel cost is only part of the cost. Wire, fuses
and mounting are not cheap
. You are throwing away power if you have resistance in the line. I went for #2 wire and good low R fuses
The dilemma was, save on wire by placing panels in series and having the MPPT
manage the conversion or panels in parallel. I went with parallel.
Anyone had a similar dilemma? Would love to hear others thoughts.
"Sold on MPPT"