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mlts22's avatar
mlts22
Explorer II
Jul 11, 2013

Feel dirty by asking... Generic MPPT solar CCs?

I feel a tad dirty, but curiosity does kill the cat here.

I've been noticing a few relatively cheap 20-40 amp MPPT controllers from China, sold at either ebay shops, or places like mppsolar.com. The pictures and YouTube vids show decently sized inductors and other critical components.

While it doesn't have the bells and whistles of a good Morningstar, the price is right, it can increase volts/amps for the different battery voltages, and the reviews show that the amps/volts/watts meter is accurate enough.

Anyone have any good/bad results with these no-named charge controllers? The cost saved by buying one of these can likely net me a couple more decently sized panels or maybe another storage battery or two.

46 Replies

  • I took a chance on the Eco-worthy 20a because I was able to see inside on a utube video. I'm not only thrilled, I'd buy another if I wanted to run my second panel. Both systems together would max over 30a tracking.

    As it is I had no need of the generator for charging even with a flat panel and the clouds rolling in around noon. We went from turn it off, scrimp and save the battery to hey Hun, lets get a 2000w inverter and a satellite.

    There is a 40a controller with all the bells and whistles for around $250 that I'd try if my panels were a matched set. It's a risk but so was the Eco-worthy.
  • A lot of those expensive MPPT controllers have more features too.
  • Hi,

    There is also the fact that a good MPPT is really a dedicated computer and the design of the MPPT algorithm is not cheap. Folks do need to be compensated for their creativity, not just the parts and labor to assemble them.
  • Remember a good Product Manager will price the offering at what the market will bear which should have limited to no relationship to what it costs to manufacture unless you’re into selling commodities aka groceries or similar everyday stuff

    Quality MPPT controllers are not yet in that catagory
  • Hardly a no-name in this case. Huge company. I have a LandStar PWM Series (not Shunt)controller that is just fine. Their MPPT version is the Tracer.

    http://epsolarpv.com/en/index.php/Product/index/id/95/am_id/134

    Tracer MPPTs are more expensive at approx. $180 than the $40 items from the no-name outfits in the OP, but if the no-namers did a good job of copying ??? they should be ok, especially where you can see how they did in back-yard testing as mentioned.

    IMO there is something not so funny about MPPT pricing. The MPPT is just a PWM with an add-on part. Must be a heck of a part to make the unit now cost hundreds more!! (probably costs at least 50 cents to make :( )

    So good for these no-name guys breaking up the party the big guys have been having at our expense! The Market Place is at work (finally! )

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