Roll Up Solar Panels / Ogre MPPT Controller
I would LOVE to get 10-12 amperes of 12 volt grade charging for my new group 31 Lifeline. But I have a motor-scooter size toad, that forces me to the roll-up kind of solar panel, and woe is me, the...
Forum Discussion
Hi Phil,
There are some panels that have more than one layer of material that output 27% of the energy hitting them vs the 17 to 20% that "regular" panels do. Unfortunately they won't be under $1 per watt.
Do you have any further knowledge of the "solar magic" and how it works?
On a long run I'd go for the maximum voltage that the MPPT would accept. However that does mean that efficiency at the controller drops.
Some panels have diodes between each and every cell. Those do the best output in shade conditions, but of course avoiding shade is always better.
There are some panels that have more than one layer of material that output 27% of the energy hitting them vs the 17 to 20% that "regular" panels do. Unfortunately they won't be under $1 per watt.
Do you have any further knowledge of the "solar magic" and how it works?
On a long run I'd go for the maximum voltage that the MPPT would accept. However that does mean that efficiency at the controller drops.
Some panels have diodes between each and every cell. Those do the best output in shade conditions, but of course avoiding shade is always better.
pnichols wrote:
Hmmmm ... if one was to have an even numbered quantity of solar panels, how about compromising for best average performance by making half of them mono and half of them poly?
Now for the tough question: Assuming you want to spend the money for a high enough input voltage spec'd MPPT - what would be best for a couple of portable panels that could wind up being up to 50 feet from the batteries -> put the two panels in parallel or put the two panels in series?
(Also, I believe that the SolarMagic technology I mentioned earlier helps reduce the effects of partial shading.)
