Hoymiles

Hoymiles HMS-2000-4T-NA

Very happy with this unit

Summary: Works as expected Gets hot Can add a fan for cheap Build an OpenDTU for monitoring I have had a SolarEdge system for 5 years but wanted to bootleg a bit more power into my PTO system without getting kicked onto NEM 3.0. Anyways, I found this in 2025 and purchased it on a whim for about $350 from NAZ Solar. I connected some old 250w panels to test it out and it got all it could out of those for about 6 months, as much as other MPPT's have. I then purchased four N Type 390w panels and this inverter is going strong. I've gotten 1300+w out of it with the panels are laying almost level on a patio roof. I installed them in August, after solar peak so I'm hoping to see it get to almost the panels rated capacity, to be honest. It does get pretty hot. I'm only using about 3/4 of its rated capacity and it's pushing 140°F on a 100°F day. I ended up printing a rack to mount a pair of fans on it and it dropped the temp by about 40°. It was working fine but I figure it is better to be cooler. The fan cost about $50 to build with the solar panel and buck converter. It just runs when the panel is producing power. I figure that is a pretty decent proxy for inverter heat. The only ding I have about the company is that if you want to do any monitoring, they want you to use their $300 DTU. I tried to source the DTU Lite and it didn't work out. Hoymiles will only let you open an account if your seller creates one for you. NAZ solar wouldn't do it for the DTU Lite because I didn't buy it though them. Anyways, I built an OpenDTU for about $50 in parts and now I have a dashboard running in Home Assistant, so it worked out fine. The way I see it, this is a real bargain. I don't know if I'd push it to 2000w and expect it to last forever, but I don't have any real reason to think it won't. It has worked perfect for me for a year. I'm looking forward to seeing how close to the panel's max it get in July. This is about what I have into it: $350 Inverter $50 cable and tool $50 fans and panel (3D printed fan mount) $50 Open DTU $5 ABS filament for custom design stand, fan mounts and covers