QS1 Single Phase Microinverter

Fantastic micro inverter. Will receive 4 solar panels. Just what I needed. Easy to install.

If you buy this item here and are not a professional installer, AP Systems will not honor the warranty. End of story.

I am an extremely technical person who is a professional software engineer who does a lot of devops and have spent 20 years working with wifi on a multitude of systems. I have been installing solar systems for 20 years starting with old school monolithic inverters and more recently using Enphase and Enecsys microinverters, and Sol-Ark battery system.I was attracted the QS1 for the low price per panel. I am regretting my buying decision for the following reasons:- System does not seem to plug and play very well. On first installation the system output was 50% below expectations.- After spending a couple hours getting the Android App and their Wifi router to talk to my phone. You have to connect directly via wifi to the Apsystems wifi box. This ought to be straight forward, but the app just didn't seem to talk to router after quite a while trying. Finally it connected. Usability was not that great but I was after some effort and fumbling around I was able to manually enter my Inverter IDs. I had noticed the power output seemed of my system was about half of what it should have been on clear sunny day, at which point the app confirmed the under performance of each panel. I linear searched through the settings and found a grid configuration - which I set to 240 volts - at which point the power output was much better. Great on that - but why on earth did I have to tell it this info? I've been installing solar for 20 years and never have previously encountered an inverter that operated at 50% of output until I told it the grid voltage.- I then configured the Apsystems wifi router to know about my home wifi router at which point I would assume the APsystems could connect to the internet and allow my Apsystems Android app to read data from my home system without being connected to Apsystems wifi connection directly - which of course only works at close range.UNFORTUNATELY what I expected is not how it worked. If I disconnected from the ECU-R wifi network, the Android App would immediately lose connection to the Apsystems router and I would have no data access to my inverters. Of course this means no remote access to my system data.- So I tried change my phone settings back to connect to the ECU-R wifi network so I get look at the data, but at this point everything took a major turn for the worse. My phone would connect to the ECU-R wifi connection but the Android app would not be able to connect. Then the second green light on the apsystems router turned off. An hour of trying to reconnect did not work.- Apsystems has no interest in providing suport to me because I am a DIY installer.I have run 4 different types of solar inverters over my 20 years of DIY solar. Apsystems QS1 is the first one that ran at half power until I went through a multi hour process.If APsystems built systems that just worked - I would have zero problem with them NOT giving me support.I was all set to give the QS1 two stars - but after taking 45 minutes writing this review, I tried to reconnect the Android app to the ECU-R and amazingly for the moment at least, it's working again and the second light turned on the Apsystems router.I will give it three stars for now.But APsystems - you really need to fix your clunky software. DIY users do not need your support - they need you to write software that works.

I've had three qs1 online now and all three are producing almost completely as advertised so far. I had some difficulties in getting the setup as the company AP Systems does not support DIY installations only professional installations as such I am only giving them 3 stars at this time

I had five of these installed with my solar power system two years ago. So far 2 of the 5 have failed. It was a professional install so the failures have been replaced under warranty, but still very poor performance.