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Solar panels and item water pump 4546
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Solar panels and item water pump 4546

by Kaytee on Wed Jul 28, 2021 10:33 pm

We 2 have solar panels .5W, 5 V and 100mA. Will they power your small water pump - item 4546.

Kaytee
 
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Re: Solar panels and item water pump 4546

by sj_remington on Thu Jul 29, 2021 10:37 am

Possibly, but perhaps only under conditions of full noon sun, with the panels wired in parallel and directly facing the sun.

The startup current of brushed DC motors is typically 5 to 10 times higher than the normal running current. As a general rule, choose a power supply capable of supplying significantly more current than the maximum you ever expect to draw.

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Re: Solar panels and item water pump 4546

by adafruit_support_bill on Thu Jul 29, 2021 10:44 am

sj_remington is correct about the startup current. This is especially true for a submersible pump which will be starting under load.

A large capacitor wired in parallel with the pump should help a bit with the startup current demands. https://www.adafruit.com/product/1589

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Re: Solar panels and item water pump 4546

by Kaytee on Sat Jul 31, 2021 4:36 pm

Thank you ! Your comments were very helpful!

Kaytee
 
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Joined: Wed Jul 28, 2021 10:29 pm

Please be positive and constructive with your questions and comments.