The Hoymiles HMS-500-1T-NA is the better microinverter overall, rated 3.9 to 3.6. The Hoymiles HMS-500-1T-NA leads on value and input current. The Enphase IQ8A wins on efficiency. The Hoymiles HMS-500-1T-NA costs $8 less ($199 vs $207).
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.
Self2Solar $199For 400 to 500 W panels on an Enphase system, but the IQ8AC replaces it with more input current for less money.
GoGreenSolar $207 Renewable Outdoors $221 Shop Solar Kits $223Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every one panel microinverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Hoymiles HMS-500-1T-NA | Enphase IQ8A |
|---|---|---|
| Overall rating | 3.9/5 | 3.6/5 |
| Value 25% | 26 $0.42 per watt ($199, 475 W) | 1 $0.59 per watt ($207, 349 W) |
| Grid listing 20% | 100 UL 1741 listed, meets rapid shutdown | 100 UL 1741 listed, meets rapid shutdown |
| Efficiency 15% | 60 96.5% CEC weighted efficiency | 80 97% CEC weighted efficiency |
| Input current 15% | 50 14 A per input | 25 12 A per input |
| Warranty 25% | 100 25-year warranty | 100 25-year warranty |
| Hoymiles HMS-500-1T-NA | Enphase IQ8A | |
|---|---|---|
| Output | ||
| Panel inputs | 1 | 1 |
| AC output | 475 W | 349 W |
| Grid voltage | 240 V split phase or 208 V | 240 V split phase |
| CEC efficiency | 96.5% | 97% |
| Peak efficiency | 96.5% | 97.7% |
| Panel input | ||
| Largest panel | 670 W | 500 W |
| Current per input | 14 A | 12 A |
| MPPT range | 16 to 60 V | 32 to 45 V |
| Listing and build | ||
| UL 1741 | Yes | Yes |
| Rapid shutdown | Yes | Yes |
| Monitoring | gateway (sold separately) | gateway (sold separately) |
| Enclosure | IP67 (NEMA 6) | NEMA 6 |
| Weight | 3.9 lb | 2.4 lb |
| Warranty | 25 years | 25 years |
| Released | - | 2021-12 |
