Home brew Arduino MPPT controller
Pretty cool project. Highly programmable. He does not list the amps it is capable of but I'm thinking 4-8 only based on the diode sizing. There are some very sophisticated MPPT algorithms out there...
Forum Discussion
KJINTF wrote:
Jim
To me that algorithm is the heart of the MPPT design and where the rubber meets the road easily differentiating the competitors. I used Blue Sky, Outback and Morningstar controllers with two K135 panels in series producing about 40Voc. For me the MS algorithm performance was easily the best of the three.
My MPPT 60 has two processors one for the tracking and one for external communications. MS has upgraded the tracking algorithm a few times over the past couple of years; their File History lets you know what's been changed.
X2. The algorithm as well as the sampling speed and range are critical, as well as the interval between sampling, and the loss of production when sampling.
There are a lot of very crude approaches out there which can result in finding a local max power point instead of the overall system max power point, or a just plain wrong one, both depending mostly on panel mix and characteristics.
Jim
