Electronics > Power/Renewable Energy/EV's

Solar wind troubles

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stojke:
Hi guys, pardon the fancy topic name, but I could really use your help! :)
It involves an solar / wind turbine power generation process in order to charge accumulators and store power for later usage.

There is a friend of mine who has an solar / wind turbine setup at his cottage, which is completely off the grid, and he would like to use these two alternate power sources in order to power on his devices, such as lights, fridge, tv, etc. The setup consists of three solar panels, a wind turbine and four accumulators. Solar panels are wired in parallel and are rated 12V 100W. They are also attached in parallel to an Wind turbine rated 12V (400~600)W which supplies power continuously (and not via impulses as I am told) and routed onto the four 12V 120A Excess Solar Gel accumulators (AGM VRLA). Charging of accumulators was done by an dedicated charge controller that died. Charging is currently done very roughly, which is connect the accumulators to bare wires and disconnect them after a few hours ( :scared: ). We have tried to fix the existing charge controller but , just look at it  >
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.  Besides the bad controller it seems that also one of the accumulators has also died and is being sent back for service (or replacement).

Due to all of this I have suggested that we build an charge controller instead of investing into a new one as it would serve as an great learning experience for both of us. I also work at an computer service and have a lot of spare parts from power supplies that we could use.

Can anybody suggest an schematic or project we could use, and if possible confirm that the wiring done with all the components is correct? Thank you.

Simon:
that looks like a circuit that probably just has a comparator that controls a relay, so your putting 12V solar panels straight into a 12V battery ? no wonder one battery is damaged. "12V" solar panels can easily hit 17V. at 15V your batteries will be boiling away liquid.

stojke:
Yes, measured voltage from the panels is usually 17V, but from what I understand the battery died before the controller died.

Simon:

--- Quote from: stojke on March 21, 2016, 11:49:29 am ---

Due to all of this I have suggested that we build an charge controller instead of investing into a new one as it would serve as an great learning experience for both of us. I also work at an computer service and have a lot of spare parts from power supplies that we could use.

Can anybody suggest an schematic or project we could use, and if possible confirm that the wiring done with all the components is correct? Thank you.

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Err, who made the original controller. Looks like that was home made.

stojke:
It was made by an small local firm that produces and sells such devices.

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