Quantum Solar Designs

does not follow manufacturer recommendations

Do not recommend. QSD designed our system against manufacturer recommendations by using significantly undersized microinverters (Enphase IQ7 vs. IQ7Plus). This results in a significantly decreased energy output estimated at 750MWh annually by Enphase in turn resulting in a significantly decreased value of the system. The decreased output is mentioned nowhere in the contract or any other documentation. Nameplate system size in the contract: 3.4kW. Actual peak output due to undersized microinveters: 2.4kW resulting in severe power output clipping and decreased annual production. Refused to do anything about this while producing misleading production estimates after the fact - after installation in May 2020. In addition: did not connect the system to WiFi for reporting. Very slow to respond to requests (phone or email). No estimated production numbers or any other metrics other than the nameplate system size in the contract or any other documentation. Summary: two major failures with a number of smaller ones: (1) did not follow manufacturer recommendations in using radically undersized microinverters; (2) did not disclose any estimated production numbers in the contract or any other documentation. P.S. I was initially ecstatic with QSD given they were highly recommended to us, and the fact that they could actually install a system where several competitors including Tesla, Solar Optimum, LA Solar Group - backed off for various reasons. Yet given the support experience, inexplicable design decisions resulting in very real monetary damage to us, and their multiple attempts to produce misleading production estimates - I can't recommend them.