A company wants $5K to install a solar powered cooler, but I only want to purchase the dc motor and panel and he will not sell those to me. Where can I find the parts I need. I want to save energy.
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about 1 year ago
A 1/2 hp motor is going to need a really big solar panel to keep a battery charged to run it all day.
Good Luck
about 1 year ago
You’ll need about 6 panels to run a 1/2 HP motor,
only when the sun shines.
They won’t sell them to you for your own good.
What you’re planning simply won’t work for you.
about 1 year ago
If the motor is really 1/2 HP, then that’s about 400 watts, maybe realistically 300 when running.
Many motors of that size are actually “universal” motors, and will run just fine off DC. I won’t give you any guarantees that it will work, and most likely no one will. You would also need to develop about 100 volts DC, which is 4 grid-tie type panels in series. To give margin when the sun isn’t absolutely brilliant, you’d probably want 5 or 6 panels. But I don’t know what would happen at sunrise, when there will be a very low voltage across the motor. Possibly it would be ok. If not, you’d need a controller to disconnect the panels when the sun isn’t bright enough. Also, you would want to have some sort of protection for the panels against the inductive kick that the motor might produce.
This is starting to sound like it would cost a sizeable fraction of $5000 already, with the bulk of the cost in the panels, which would be $500-$1000 each, depending on what kind you get.
It could work, if your goal is to save energy. If your goal is to save money, that sounds difficult.