APsystems DS3
#1 in Two panelFull review
The two panel pick for big modern panels: the highest input current here and a low price per watt from retailers.
APsystems $295 US Solar Supplier $193.19$193.19
4.3/5
A two panel unit for smaller 300 to 350 W panels. Pairs of modern 400 W+ panels lose output to clipping.
- 590 WAC output
- 2Panels
- YesUL 1741
- 25 yearsWarranty
Check price at Signature Solar$197.50
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- A 20 A input on each panel takes the current of any panel on sale
- Two panels per unit halves the inverters to mount
- Meets rapid shutdown and carries a 25 year warranty
Cons
- 590 W continuous clips a pair of panels over about 300 W each
- Costs more per watt than the APsystems DS3 and Hoymiles HMS-1000
- Monitoring needs a separate gateway
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 | D600-M2A |
|---|---|
| Output | |
| Panel inputs | 2 |
| AC output | 590 W |
| Grid voltage | 240 V |
| CEC efficiency | 96.5% |
| Panel input | |
| Largest panel | 450 W |
| Current per input | 20 A |
| MPPT range | 22 to 55 V |
| Listing and build | |
| UL 1741 | Yes |
| Rapid shutdown | Yes |
| Monitoring | power line to a gateway |
| Enclosure | IP67 (NEMA 6) |
| Warranty | 25 years |
Alternatives in this panel count
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
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
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