Duracell D600-M2A
#3 in Two panelFull review
A two panel unit for smaller 300 to 350 W panels. Pairs of modern 400 W+ panels lose output to clipping.
Signature Solar $197.50$197.50
4.2/5
A two panel unit for smaller 300 to 350 W panels. Most buyers should get the DS3-L, which costs less.
- 640 WAC output
- 2Panels
- YesUL 1741
- 25 yearsWarranty
Check price at APsystems$205Check price at US Solar Supplier$195
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- A 16 A input on each of two panels handles modern high current panels
- Two panels per unit halves the number of inverters to mount
- Meets rapid shutdown and carries a 25 year standard warranty, no registration needed
Cons
- 640 W continuous clips a pair of panels much above 350 W
- The DS3-L costs less and puts out more
- Monitoring needs an APsystems ECU gateway, sold separately
The APsystems DS3 family
Every APsystems DS3 model we rank, smallest first. Ratings compare each against its own panel count.
| Model | AC output | Rating | Price |
|---|---|---|---|
| APsystems DS3-S (this one) | 640 W | 4.2/5 | $195 |
| APsystems DS3-L | 768 W | 4.6/5 | $177.56 |
| APsystems DS3 | 880 W | 4.7/5 | $193.19 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its panel count. How we rank explains each one.
Specifications
| Model number | DS3-S |
|---|---|
| Output | |
| Panel inputs | 2 |
| AC output | 640 W |
| Grid voltage | 240 V split phase or 208 V |
| CEC efficiency | 96.5% |
| Peak efficiency | 97.3% |
| Panel input | |
| Largest panel | 480 W |
| Current per input | 16 A |
| MPPT range | 28 to 45 V |
| Listing and build | |
| UL 1741 | Yes |
| Rapid shutdown | Yes |
| Monitoring | gateway (sold separately) |
| Enclosure | NEMA 6 |
| Weight | 5.7 lb |
| Warranty | 25 years |
| Released | 2021-09 |
Alternatives in this panel count
Hoymiles HMS-1000-2T-NA
#4 in Two panelFull review
A strong value for pairs of 450 to 600 W panels, with enough input current for big modern modules.
Self2Solar $269$269
Hoymiles HMS-800-2T-NA
#6 in Two panelFull review
A two panel unit for 360 to 420 W panels. At the same price the HMS-1000 is the better buy unless your panels are small.
Self2Solar $269$269
Compare
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