APsystems DS3-L
#2 in Two panelFull review
A cheap, efficient two panel unit for pairs of 350 to 450 W panels, with input current to spare.
APsystems $245 US Solar Supplier $177.56 Shop Solar Kits $184.98$177.56
The APsystems DS3-L is the better microinverter overall, rated 4.6 to 4.2. The APsystems DS3-L leads on value, input current and efficiency. The APsystems DS3-L costs $17.44 less ($177.56 vs $195).
APsystems DS3-S
#5 in Two panelFull review
A two panel unit for smaller 300 to 350 W panels. Most buyers should get the DS3-L, which costs less.
APsystems $205 US Solar Supplier $195$195
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 APsystems DS3-L for value ($0.23 per watt ($177.56, 768 W) vs $0.30 per watt ($195, 640 W)), input current (18 A per input vs 16 A per input) and efficiency (97% CEC weighted efficiency vs 96.5% CEC weighted efficiency).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every two panel microinverter; a clear win is highlighted. How we rank explains each one.
| Factor weight | APsystems DS3-L | APsystems DS3-S |
|---|---|---|
| Overall rating | 4.6/5 | 4.2/5 |
| Value 25% | 69 $0.23 per watt ($177.56, 768 W) | 49 $0.30 per watt ($195, 640 W) |
| Grid listing 20% | 100 UL 1741 listed, meets rapid shutdown | 100 UL 1741 listed, meets rapid shutdown |
| Efficiency 15% | 80 97% CEC weighted efficiency | 60 96.5% CEC weighted efficiency |
| Input current 15% | 100 18 A per input | 75 16 A per input |
| Warranty 25% | 100 25-year warranty | 100 25-year warranty |
Specifications
| APsystems DS3-L | APsystems DS3-S | |
|---|---|---|
| Output | ||
| Panel inputs | 2 | 2 |
| AC output | 768 W | 640 W |
| Grid voltage | 240 V split phase or 208 V | 240 V split phase or 208 V |
| CEC efficiency | 97% | 96.5% |
| Peak efficiency | 97.3% | 97.3% |
| Panel input | ||
| Largest panel | 570 W | 480 W |
| Current per input | 18 A | 16 A |
| MPPT range | 28 to 45 V | 28 to 45 V |
| Listing and build | ||
| UL 1741 | Yes | Yes |
| Rapid shutdown | Yes | Yes |
| Monitoring | gateway (sold separately) | gateway (sold separately) |
| Enclosure | NEMA 6 | NEMA 6 |
| Weight | 5.7 lb | 5.7 lb |
| Warranty | 25 years | 25 years |
| Released | 2021-09 | 2021-09 |