Review on Y&H Grid Tie Inverter 600W Stackable DCDC15-28V PV Input AC110V MPPT Pure Sine Wave Micro Inverter for 12V Solar Panel/24V Battery by Tim Ross

This rating is based on years of experience with line-side inverters. The photo shows parts of DC input terminals that fail on them. I know you don't see melting, but I'll show you cheap parts that solar panels connect to. They are made of cheap metal, which conducts electricity poorly and breaks easily. They overheat and melt the plastic that holds them in place. I have ordered 13 line converters from Revain. They are all similar to this model 600W 30V/36V Grid Inverter Stackable MPPT Pure Sine Wave DC 30-46V Solar Input. They all failed within a year or so, mainly due to overheating and melting of the DC input connections. I want people to know that the DC input terminals on the 600 watt versions of these inverters almost always overheat and melt. Sometimes the reason is that the internal screws are not tightened, resulting in high connection resistance. What I had to do on some was remove the 4 screws that DC enters and unscrew (or break off) the connector pins inside so I could connect directly to the pins and bypass the input connectors. This usually leaves the inverter open as I can't reattach the bottom plate once the connections are made. That's not a problem because I keep mine in a small shed where it's safe to open them to cool. I've had a couple of 1000 watt inverters that failed for unknown reasons. It's just wasted money. 1000W line-side inverters mostly use screw type input terminals that can handle current. If you buy one of the 600 watt versions, keep an eye on it and at the first sign of melting, turn it off, unplug it and plug it in directly to keep it running. They are sold by several vendors under different names, but the inverter looks pretty much the same. I've never bought any of the $300 inverters to see if they get better, so I can't speak for them, but their reviews should help you decide if they're worth the money. Grid-inverter solar panels were a lot of fun, but overheating and melting at the joints was my main failure mechanism. If you do something like this, keep an eye on your devices and connections. Feel your connections frequently to catch overheating early so you can fix it if you find it.