I have an electrical question.

I have 3 large containers filled with vegetable oil that I need to drain when they get filled. I wanted to set up a solar system so this could be done first by manually flipping a switch and then rig up some kind of float switch later, but I ran into problems. I think I know the issue but I want to ask a professional to make sure I am correct before I sink more money into this.

right now I have a solar panel with the following specs.
- (Pmax) = 30W Rated maximum power
- Output Tolerance = +/- 1
- (Vmp) = 18.2V Voltage at pump
- (Imp) = 1.65A Current at pump
- (Voc) = 22V Open-Circuit current
- (Isc) = 1.82A Short-Circuit Current
- Maximum system voltage = 1000V
- Maximum Series Fuse Rating: 15.0A


Devices are 3 pumps all the same that have the following specs.
- Voltage = 12 V
- Current (Amps) =1.9A

The pumps are 12VDC? From what I can see, the pumps are too large for the panel. They do not generate that much current, particularly if you are trying to run 3 pumps. Why not use the panels to charge a battery and then use the battery for the source.

Do you think that this panel would be able to run one of these pumps instead of all three at once?

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Originally Posted by ma0641

The pumps are 12VDC? From what I can see, the pumps are too large for the panel. They do not generate that much current, particularly if you are trying to run 3 pumps. Why not use the panels to charge a battery and then use the battery for the source.

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Do you think this panel would be able to run just one of these pumps instead of all three?

Vmp) = 18.2V Voltage at pump
- (Imp) = 1.65A Current at pump
- (Voc) = 22V Open-Circuit current
- (Isc) = 1.82A Short-Circuit Current
Your pump, according to your notations is 1.9 Amps and that is running amp not startup.
Why not a battery, would be more than adequate.