Solar on a small TT
I'm looking at a small travel trailer (starcraft satellite 17rb) which is only about 20ft long. Roof is composite one piece without much of a flat area. One thing that I absolutely want on my next R...
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I made a reasonable scaled drawing of my roof including elevation of any object like an A/C etc that could cast a shadow onto a panel. I also made scaled drawings of the various sized (physical size) panels and looked at how they would fit on the roof.
I wanted 500W+ and in the end went with 3x 250W raised panels which avoided rig shadows. This setup with a MPPT controller and 24V panels was only $100 more than a similar wattage setup with 12V panels and PWM controller. 24V panels are less $/watt and more W/sq ft and virtually paid for the higher and better MPPT controller.
In addition my panels have 3 bypass diode each. Wired in series I also have better shade output than parallel panels for external shadows like leafy trees. I get charging when there would be none with the same shade on parallel panels.
I wanted 500W+ and in the end went with 3x 250W raised panels which avoided rig shadows. This setup with a MPPT controller and 24V panels was only $100 more than a similar wattage setup with 12V panels and PWM controller. 24V panels are less $/watt and more W/sq ft and virtually paid for the higher and better MPPT controller.
In addition my panels have 3 bypass diode each. Wired in series I also have better shade output than parallel panels for external shadows like leafy trees. I get charging when there would be none with the same shade on parallel panels.
