The Enphase choice for today’s 450 W and larger panels. It gets the most output per panel in the line at its lowest price per watt.
altE $161 US Solar Supplier $185.44 Signature Solar $239.75
A single panel inverter for big 500 W+ panels where shade or odd roof planes call for one inverter per panel. For a plain array, a Hoymiles four panel unit costs much less per watt.
- 475 WAC output
- 1Panels
- YesUL 1741
- 25 yearsWarranty
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
- 475 W continuous output, more than any Enphase single panel unit, for panels up to 670 W
- A 14 A input handles modern high current panels
- Meets rapid shutdown and carries a 25 year warranty
- Costs more per watt than Hoymiles two and four panel units
- Monitoring needs a Hoymiles DTU gateway, sold separately
- Lower CEC efficiency than Enphase
The Hoymiles HMS family
Every Hoymiles HMS model we rank, smallest first. Ratings compare each against its own panel count.
| Model | AC output | Rating | Price |
|---|---|---|---|
| Hoymiles HMS-500-1T-NA (this one) | 475 W | 3.9/5 | $199 |
| Hoymiles HMS-800-2T-NA | 720 W | 4.0/5 | $269 |
| Hoymiles HMS-1000-2T-NA | 958 W | 4.3/5 | $269 |
| Hoymiles HMS-1600-4T-NA | 1,440 W | 4.2/5 | $379 |
| Hoymiles HMS-1800-4T-NA | 1,660 W | 4.3/5 | $369 |
| Hoymiles HMS-2000-4T-NA | 1,918 W | 4.5/5 | $389 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its panel count. How we rank explains each one.
Specifications
| Model number | HMS-500-1T-NA |
|---|---|
| Output | |
| Panel inputs | 1 |
| AC output | 475 W |
| Grid voltage | 240 V split phase or 208 V |
| CEC efficiency | 96.5% |
| Peak efficiency | 96.5% |
| Panel input | |
| Largest panel | 670 W |
| Current per input | 14 A |
| MPPT range | 16 to 60 V |
| Listing and build | |
| UL 1741 | Yes |
| Rapid shutdown | Yes |
| Monitoring | gateway (sold separately) |
| Enclosure | IP67 (NEMA 6) |
| Weight | 3.9 lb |
| Warranty | 25 years |
Alternatives in this panel count
The best value in the Enphase line for 350 to 450 W panels. It takes more current than the IQ8M for less money.
US Solar Supplier $149.46 Signature Solar $211The Enphase pick for 400 to 500 W panels, replacing the IQ8A with a higher input current at a lower price.
US Solar Supplier $173.96 Signature Solar $211 altE $227.44Compare
Compare the Hoymiles HMS-500-1T-NA with any other microinverter →
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