Well there are a few problems. It is not UL listed or even certified so no code compliant installs in the US. It does not have LIFEPO4 as a battery type to select, you can use user defined and put in your setting in. Not hard but a bit of a pain. It would not work with my generator so I have an extra expense getting an inverter generator. I have contacted Phocos 2 times for assistance the first time took 4 days to get a response, much better than many companies. Still waiting for the second, it's been about 4 days. The build quality looks great and it has several very nice features. I especially like the bluetooth ability. Overall I would say there are probably better choices out there especially if you want a code compliant system.