Hoymiles HM-1500NT
#4 in Four panelFull review
An older four panel design for 300 to 450 W panels. The newer HMS-1800 and HMS-2000 cost the same or less and take more current.
Self2Solar $387.50$387.50
The Hoymiles HM-1500NT is the better microinverter overall, rated 4.0 to 3.6. The Hoymiles HM-1500NT leads on warranty. The APsystems QS1 wins on input current. The APsystems QS1 costs $92.50 less ($295 vs $387.50).
APsystems QS1
#5 in Four panelFull review
A four panel unit for 300 to 450 W panels at a low price per watt, but check that your utility accepts UL 1741 SA and price the warranty extension.
APsystems $295$295
Prices 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.
Which should you buy?
- Choose the Hoymiles HM-1500NT for warranty (25-year warranty vs 10-year warranty).
- Choose the APsystems QS1 for input current (14 A per input vs 11.5 A per input).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every four panel microinverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Hoymiles HM-1500NT | APsystems QS1 |
|---|---|---|
| Overall rating | 4.0/5 | 3.6/5 |
| Value 25% | 58 $0.27 per watt ($387.50, 1,438 W) | 64 $0.25 per watt ($295, 1,200 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 | 60 96.5% CEC weighted efficiency |
| Input current 15% | 19 11.5 A per input | 50 14 A per input |
| Warranty 25% | 100 25-year warranty | 25 10-year warranty |
Specifications
| Hoymiles HM-1500NT | APsystems QS1 | |
|---|---|---|
| Output | ||
| Panel inputs | 4 | 4 |
| AC output | 1,438 W | 1,200 W |
| Grid voltage | 240 V split phase or 208 V | 240 V split phase or 208 V |
| CEC efficiency | 96.5% | 96.5% |
| Peak efficiency | 96.7% | 96.5% |
| Panel input | ||
| Largest panel | 505 W | 525 W |
| Current per input | 11.5 A | 14 A |
| MPPT range | 16 to 60 V | 22 to 48 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 | 7.4 lb | 9.9 lb |
| Warranty | 25 years | 10 years |