Originally Posted by barnakiel
is a huge waste of time and money
With full respect, I will somewhat disagree.
harvest is dictated by cosine of the sun angle.
You say the sun angle is constantly changing, and this is the whole point behind adjustable panels
. So where you see an argument con, many will see an argument pro.
When anchored the boat
is not moving thru 360 degrees but more often thru about 60 degrees. So once you adjust the panel, you are reaping extra amps till the sun moves by 30 degrees or so.
Not all boats have the space to place so many horizontal panels that their output will fully charge the bank in one sun-day. Many smaller monohulls can benefit from having adjustable panels.
I respect your view and understand that our opinions must differ simply because our sailing styles/boats are vastly different. (We have a small and narrow ended boat
and we only sail either crossings or else we are anchored in the West Indies).
We have 150W of solar panels
onboard wired thru an A/Ah/cumm Ah monitor
, so every time I adjust the rig I can immediately read the result. Trust me, the difference is of a major grade.
I do not question that aiming a solar
panel squarely to the sun will produce more amps. I know it will.
But is it practical?
I suppose if one has the discipline to be changing the adjustment.
I know I don't.
Especially if I consume about 100 A-hrs per day, and the panel, even when adjusted optimally replenishes less than 50% of consumption
So now the engine
has to be operated every day for an hour. Be tied to adjusting the panel several times per day and that can be reduced to 55 minutes.
At some point (I suspect usually before the end of the second week), many will stop adjusting and just run the engine
a little longer each morning.