12V heater run straight from solar panel
Is there a heater product that can run off the 12V that comes directly off my portable solar panel? This would have to be something that can handle unregulated power that might peak up during bright ...
Forum Discussion
DarkSkySeeker wrote:
What if I bought 5 of these, wired them in parallel, and mounted them on a board?
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At 12V, Ohm's law says that 1.2A would flow through each one, which means a dissipation of a bit under 15W each. Total wattage would be around 150W. To get 50W power dissipation, the applied voltage would have to be a bit over 22V.
According to the resistor data sheet, with no heat sink (i.e. mounted on a board), rated dissipation is 14W. To dissipate 50W each you must have a heat sink to keep their temperature reasonable. In either case they ought to be mounted on something that can take the heat; a wooden board would not be the wisest choice in my estimation.
$35 seems like a lot of money to spend for the anemic results you'd tend to get.
