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Solar Panel – DC motor – Rated Power ? Functionality ?
I have a solar panel 7.5V 1.25W 150mah, connect 2 in parallel to power a RC boat. The boat use to run on 6cell battery pack – 7.2V 1800Mah.
The dc motor requirement based on the provided battery pack, i assume would be 7.2V and rated at (7.2V * 1.8Amp) = 12.96 Watt.
Would two of my solar panels run this DC motor ?
are my calculations or understanding correct ?
do lend a hand dear ”world”
Yes i assumed the motor was at 1.8Amps from the 1800mah spec the battery had, my bad.
Sorry for the english mishap, was in a rush.
I really do not know how to find out about the motor spec, it is a rc boat i purchased and now planning to use solar to run it, in other words removing the battery and only relying on solar energy.
pretty confusing this is!
i connected the solar panels but the motor did not respond. i suppose you are right, i need more then 2 piece of them solar panels.
Balaenoptera Musculus Radio Remote Control Racing Boat
One Response to “Solar Panel – DC motor – Rated Power ? Functionality ?”
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solar cells are not rated in mah, they are rated in ma or amps. I’ll assume this one is 150mA. Two in parallel will give you 300mA, so that will charge a 1800mA-hr battery in 1800/300 = 3 hours. Theoretically, in bright sunlight if the array is exactly at right angles to the sun’s rays.
The problem is, depending on the type of cells, the battery pack will need 8 volts or so to charge, and your solar cells won’t deliver that. If the sun is at an angle, you may get only 3-5 volts.
so you have to put them in series, so you will get only 150mA out of them, which will charge the battery in 6 hours of bright sunlight.
“Would two of my solar panels run this DC motor ?”
If the motor is 1.8 amps, you need the battery, the arrays are not near enough.
Or are you attempting to replace the battery pack with the solar array? Your english makes that difficult to understand. If so, put them in parallel to get the 300mA, but that would run the 1.8 amp motor very slowly. If you had 12 of the solar panels, it might run at close to full speed if the sun is bright and shining directly on all the panels.
But where did you get the 1.8 amps for the motor? The 1800Mah rating of the battery has ZERO to do with the motor current. So the answer above is based on your number, which I suspect is totally wrong.
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