Knowledge Base › Microinverters
APsystems DS3 (S/L/base variants)
Manufacturer documented NA verified Sept. 2, 2026
UNKNOWN
Identity
| category | microinverters |
| generation | DS3 |
| manufacturer | APsystems |
| market_version | North America 208 V / 240 V single-phase |
| model | DS3 (S/L/base variants) |
| product_family | DS3 Microinverter Series (DS3-S / DS3-L / DS3) |
| product_status | active |
| region | NA |
Electrical
| ac_coupling_compatibility | UNKNOWN |
| ac_rated_power_w | DS3-S: 640 VA; DS3-L: 748 VA; DS3: 880 VA |
| grid_profiles | CA Rule 21 (UL 1741 SB) compliant |
| max_dc_input_power_w | UNKNOWN |
| max_dc_voltage_v |
60
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — INPUT DATA (DC), 'Maximum Input Voltage 60V'
|
| max_input_current_a |
DS3-S: 16A x 2; DS3-L: 18A x 2; DS3: 20A x 2 (per input)
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — INPUT DATA (DC), 'Maximum Input Current 16A x 2 / 18A x 2 / 20A x 2'
|
| max_short_circuit_current_a |
DS3-S: 20A per input; DS3-L: 22.5A per input; DS3: 25A per input
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — INPUT DATA (DC), 'Maximum Input Short Circuit Current 20A / 22.5A / 25A per input'
|
| monitoring_protocol | encrypted wireless ZigBee |
| mppt_range_v |
28-45 (peak power tracking); 26-60 (operating voltage range)
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — INPUT DATA (DC), 'Peak Power Tracking Voltage 28V-45V'; 'Operating Voltage Range 26V-60V'
|
| num_mppt |
2
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — INPUT DATA (DC), 'Number of MPPT 2'; 'Number of Inputs 2'
|
| supported_module_power_range_w | DS3-S: up to 400W+; DS3-L: up to 480W+; DS3: up to 550W+ (dual-module) |
Physical / mechanical
| depth_mm | DS3-S: 41.2; DS3-L and DS3: 42.5 |
| height_mm | 218 |
| mounting_bolt_size | module racking vendor hardware (user manual) |
| mounting_type | ['rooftop'] |
| torque_specs |
AC connector nut: 4-5 N.m (DS3 series user manual p.11)
APsystems Microinverter DS3 series for APAC - User manual — user manual p.11, 'Rotate the nut with 4-5N.m'
|
| weight_kg | DS3-S: 2.7; DS3-L and DS3: 3.1 |
| width_mm |
263
Datasheet | DS3 Microinverter Series (DS3-S / DS3-L / DS3) — MECHANICAL DATA, '263mm x 218mm x 41.2mm' (DS3-S) / '263mm x 218mm x 42.5mm' (DS3-L)
|
Installation
| clearance_bottom_mm | 15 |
| clearance_top_mm | 15 |
| direct_sunlight_restriction | Install the microinverters (including DC and AC connectors) under the PV modules to avoid direct exposure to rain, UV or other harmful weather events (user manual p.9) |
| indoor_outdoor | outdoor (Type 6 / IP67) |
| mounting_orientation | under the PV modules |
| ventilation_requirements | Allow a minimum of 1.5 cm (3/4 in) below and above the casing of the microinverter to allow proper air flow (user manual p.9) |
Environment
| cooling_method | natural convection - no fans |
| ip_rating | IP67 |
| nema_rating | Type 6 |
| operating_temperature_c | -40 to +65 (-40 degF to +149 degF) |
| storage_temperature_c | -40 to +85 (-40 degF to +185 degF) |
Interfaces & connectors
| ac_terminal_type | APsystems Y3 AC Bus cable, 2.5 mm2 (23 A) or 4 mm2 (28 A), Y-CONN connector |
| cloud_api | APsystems EMA |
| ethernet | False |
| protocol_notes | An APsystems ECU is required for monitoring and grid-profile configuration. |
| pv_connector_type | Staubli MC4 PV-ADBP4-S2 & ADSP4-S2 |
| rs485 | False |
| wifi | False |
| zigbee | encrypted ZigBee to APsystems ECU |
Controls & display
| display_type | none |
| leds | Ten short green blinks at DC power-up = successful startup; slow green flash (5 s gap) = producing power; slow red = not producing power; fast red/green (2 s) = ECU communication lost (user manual p.16) |
| local_display | False |
| mobile_app | APsystems EMA App |
Protection
| anti_islanding | yes (IEEE1547 listing) |
| ground_fault_protection | Ground Fault Detector Interrupter (GFDI) error detection |
| integrated_breakers_fuses | integrated safety protection relay |
| rapid_shutdown | NEC 2023 690.12 rapid shutdown compliant (datasheet certification block) |
Certifications
| emc | ['FCC Part15B'] |
| grid_codes | ['IEEE1547', 'CA Rule 21'] |
| other | ['NEC 2023 690.12 Rapid Shutdown Compliant'] |
| regional | [] |
| safety | ['UL1741', 'CSA C22.2 No.107.1-16'] |
Warranty & service
| conditions | Datasheet FEATURES: '12 Years Standard ; 25 Years Optional' |
| extended_options_years | [25] |
| standard_years | 12 |
Documents
Additional documented parameters
Recorded verbatim from the source; no schema field exists for these yet.
| Isolation Design | High Frequency Transformers, Galvanically Isolated |
| Max Output Fault Current & Duration | 5.691Apk, 26.75ms; 3.307Arms |
| Max Units per 10AWG Branch (30A) | DS3-S 8@208V/9@240V; DS3-L 6@208V/7@240V; DS3 5@208V/6@240V |
| Max Units per 12AWG Branch (20A) | DS3-S 5@208V/6@240V; DS3-L 4@208V/5@240V; DS3 3@208V/4@240V |
| Night Power Consumption | 20mW |
| Nominal Frequency/Range | 60Hz/58.8Hz-61.2Hz(HECO:57Hz-63Hz) |
| Nominal Output Current | DS3-S 3.08A@208V/2.66A@240V; DS3-L 3.7A@208V/3.2A@240V; DS3 4.2A@208V/3.7A@240V |
| Peak Efficiency / CEC Efficiency / Nominal MPPT Efficiency | 97.3% / 97% / 99.5% |
| Power Factor (Default/Adjustable) | 0.99/0.8 leading...0.8 lagging |