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### Topic: Using solar panel to power small DC Motor 6/9v (Read 1 time)previous topic - next topic

#### dweiss42

##### May 02, 2013, 07:18 am
I am trying to use a small solar panel to charge a battery and power a small DC motor 6/9v.

I don't know what type of solar panel I need to buy in order to power a motor that is rated for 6V DC, has an operating voltage of 1.5-6.5V DC, and no load current of 280mA.  It is a very small standard DC hobbyist motor.

Is it correct to say that the motor is using (280*10^-3)(6.5v) = .5096 Watts?  Therefore, I need a solar panel that can produce at lease .5 Watts and 6V?

Also, what type of battery do I need to hold the charge generated by the solar panel?  Is a 9V rechargeable battery sufficient?

Thanks,

Dan

#### arduinomagbit

#1
##### May 02, 2013, 08:59 am
6.5V * .28= 1.82 Watts, and if you are charging a battery while doing the motor, you need at least a 2 watts solar panel. Depends on what the battery you need for. If it's just for powering the motor, It's better to get super-capacitor than battery.

I am trying to use a small solar panel to charge a battery and power a small DC motor 6/9v.

I don't know what type of solar panel I need to buy in order to power a motor that is rated for 6V DC, has an operating voltage of 1.5-6.5V DC, and no load current of 280mA.  It is a very small standard DC hobbyist motor.

Is it correct to say that the motor is using (280*10^-3)(6.5v) = .5096 Watts?  Therefore, I need a solar panel that can produce at lease .5 Watts and 6V?

Also, what type of battery do I need to hold the charge generated by the solar panel?  Is a 9V rechargeable battery sufficient?

Thanks,

Dan

#### mauried

#2
##### May 02, 2013, 10:00 am
Whats the motor going to be powering?
For how much of the day will the motor be running?
Do you want the motor to run in the middle of winter?
All these factors are needed to size the solar panel.

#### MarkT

#3
##### May 02, 2013, 01:39 pm
How much capacity do you want in the battery?
What battery chemistry?
You realise for most batteries you have to protect against over-charge and over-discharge? (otherwise you
ruin the battery)

If you say what you want to achieve, we can probably advise better.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

#### dweiss42

#4
##### May 02, 2013, 04:53 pm
Sorry for the lack of detail.

Whats the motor going to be powering?

A 4 inch diameter pinwheel.

For how much of the day will the motor be running?

All day and night.  I don't want it to turn off.

Do you want the motor to run in the middle of winter?

Assume it is moderately sunny outside.

How much capacity do you want in the battery?

I'm not sure.  How much would you suggest?

What battery chemistry?

I have no preference.

You realise for most batteries you have to protect against over-charge and over-discharge? (otherwise you
ruin the battery)

I was going to use a rechargeable battery to address this issue.  Will this not be sufficient to deal with this problem?

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