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
The APsystems QS1 rates 3.6 among four panel microinverters; the APsystems EZ1-LV rates 3.4 among two panel ones. The APsystems QS1 costs $4 less ($295 vs $299).
APsystems EZ1-LV
#8 in Two panelFull review
For a small two panel system that plugs into an outlet circuit where your utility allows it. For a permanent roof array, a 240 V unit has a longer warranty and better efficiency.
APsystems $325 Shop Solar Kits $299 US Solar Supplier $299.99$299
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.
Scores side by side
These two sit in different panel count classes (four panel and two panel), and each is scored against the reference points for its own class, so a rating says how well each does among its own panel count peers. How we rank explains each factor.
| Factor weight | APsystems QS1 | APsystems EZ1-LV |
|---|---|---|
| Overall rating | 3.6/5 | 3.4/5 |
| Value 25% | 64 $0.25 per watt ($295, 1,200 W) | 43 $0.33 per watt ($299, 900 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 | 0 95% CEC weighted efficiency |
| Input current 15% | 50 14 A per input | 100 18 A per input |
| Warranty 25% | 25 10-year warranty | 35 12-year warranty |
Specifications
| APsystems QS1 | APsystems EZ1-LV | |
|---|---|---|
| Output | ||
| Panel inputs | 4 | 2 |
| AC output | 1,200 W | 900 W |
| Grid voltage | 240 V split phase or 208 V | 120 V |
| CEC efficiency | 96.5% | 95% |
| Peak efficiency | 96.5% | 96% |
| Panel input | ||
| Largest panel | 525 W | 660 W |
| Current per input | 14 A | 18 A |
| MPPT range | 22 to 48 V | 27 to 45 V |
| Listing and build | ||
| UL 1741 | Yes | Yes |
| Rapid shutdown | Yes | Yes |
| Monitoring | gateway (sold separately) | Wi-Fi built in |
| Enclosure | NEMA 6 | NEMA 6 |
| Weight | 9.9 lb | 9.3 lb |
| Warranty | 10 years | 12 years |
| Released | - | 2026-07 |