The Hoymiles HMS-500-1T-NA and the Enphase IQ8AC are evenly matched, rated 3.9 and 3.9. The Hoymiles HMS-500-1T-NA leads on value. The Enphase IQ8AC wins on efficiency. The Enphase IQ8AC costs $25.04 less ($173.96 vs $199).
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 $199The 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 $227.44Prices 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 IQ8AC |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Value 25% | 26 $0.42 per watt ($199, 475 W) | 13 $0.50 per watt ($173.96, 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 | 50 14 A per input |
| Warranty 25% | 100 25-year warranty | 100 25-year warranty |
| Hoymiles HMS-500-1T-NA | Enphase IQ8AC | |
|---|---|---|
| Output | ||
| Panel inputs | 1 | 1 |
| AC output | 475 W | 349 W |
| Grid voltage | 240 V split phase or 208 V | 240 V split phase or 208 V |
| CEC efficiency | 96.5% | 97% |
| Peak efficiency | 96.5% | 97.3% |
| Panel input | ||
| Largest panel | 670 W | 500 W |
| Current per input | 14 A | 14 A |
| MPPT range | 16 to 60 V | 28 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 |
