> Hi Troy, > > The Sharp Sunvista JH-3500U stopped being produced in 2005ish. Fronius and > Kaco may have products with 3 MPPT inputs. > > Sorry to hear about your trouble with microinverters. I'm guessing those > were older units. Our current line of products has had extremely low failure > rates. Perhaps you should try Enphase microinverters again.
Nick, We have had problems with *all* 175 and 190 installs. We got tired of ripping apart the arrays every year to replace 1 or 2 inverters. We saw we had a linear failure rate on all the arrays, with replacements needed every year. Enphase was not responsive to doing a full replacement on the arrays where we were have continuous failures of the old inverters, even though it is clear they will all eventually die at a rate of 2 per year, every year. It was become phenomenally expensive to take apart an array to get out 1 or 2 inverters, and then rebuild that array, and repeat it every year. Until microinverters have proven a track record of being 30 year solutions (& no electrolytic capacitors), the idea of having per-panel monitoring is totally flawed because you are monitoring a module that has a 5 or 6-sigma reliability, with an inverter that has a 1 or 2-sigma reliability. thanks, Troy Harvey --------------------- Principal Engineer Heliocentric 801-453-9434 tahar...@heliocentric.org
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