$410
pledged of $2,500pledged of $2,500 goal
8
backers
0seconds to go
Funding Unsuccessful
The project's funding goal was not reached on Mon, May 11 2015 3:37 PM UTC +00:00
Jack MurrayBy Jack Murray
First created
Jack MurrayBy Jack Murray
First created
$410
pledged of $2,500pledged of $2,500 goal
8
backers
0seconds to go
Funding Unsuccessful
The project's funding goal was not reached on Mon, May 11 2015 3:37 PM UTC +00:00

About

Solar panels installed on sailboats and RVs can have a big problem with shading.

Using typical solar panels, all cells are connected in series.  This causes the output of the panel to be significantly reduced if even a single cell on the panel is shaded.  The solution is to use smaller panels and connect them in parallel, so shade in one panel does not effect the other panels. 

For this to work, each panel needs to have the same output voltage. This micro/mini MPPT controller is a boost converter that upconverts a 12v panel output to a 24v output so all panels have the same 24v output regardless of any shading.  The higher voltage also reduces losses in the wiring from outdoors to indoors.  This circuit board is small and designed to attach directly to the panel, in the junction box, or with its own housing. It has no electrolytic capacitors to limit its lifetime.

The 24v output is then feed into an indoor single central MPPT battery charger that converts the 24v back to 12v to charge a 12v battery bank.

This kickstarter is for just the outdoor MPPT board, and is not a battery charger.  There are already many indoor MPPT battery chargers available.  

I have designed and tested the microMPPT prototype circuit board.  The chip is too difficult to solder by hand.  We need at least 100 boards to make it cost effective to have them assembled by machine.  Even better would be 500.

More detailed information can be found on www.electric-boat-forum.com

Risks and challenges

The circuit board has been tested and confirmed to work as expected.
Only risk might be a long delay in having them assembled, or a lack of chip availability.

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Support

  1. Select this reward

    Pledge $25 or more About $25

    This is for a single microMPPT controller, that can handle a single '12v' solar panel up to 100 watts.

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    Pledge $50 or more About $50

    This is for two microMPPT boards

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  3. Select this reward

    Pledge $100 or more About $100

    You will get Four miniMPPT circuit boards

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  4. Select this reward

    Pledge $200 or more About $200

    You will get Eight miniMPPT circuit boards

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    Pledge $1,000 or more About $1,000

    You will get a big thank you and 16 circuit boards.

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Funding period

- (20 days)