Product details & specifications
The AlpSolarr PULSE S3 off-grid hybrid inverter is offered in 4kW and 6kW models for solar and battery backup systems. It supports 48V lithium-ion or lead-acid batteries, dual AC outputs for load management and battery-free operation. A single MPPT accepts two strings with up to 28A input current, while an IP66 enclosure protects the inverter.
Key features
- Choose 4kW or 6kW rated backup output to suit your system load.
- 48V battery platform with a 40–60V operating range.
- Single MPPT with two strings, a 60–450V tracking range and 28A input current.
- Dual AC outputs with intelligent load management and battery-free operation.
- AC and PV inputs can activate a compatible lithium battery.
- Supports up to 6 units in a single-phase parallel configuration or 9 units in a three-phase configuration.
- IP66 protection, smart cooling, and Type II AC/DC surge protection.
- 97.0% maximum efficiency and 99.9% MPPT tracking efficiency; Wi-Fi optional.
Selected model specifications
| Rated backup output | 4,000W (4kW) |
|---|---|
| Rated output current | 18A |
| Maximum battery charge / discharge current | 80A / 100A |
| Maximum MPPT input power | 6,800W |
| Maximum PV access power | 8,000W |
| Maximum grid input current | 26A |
| Rated backup output | 6,000W (6kW) |
|---|---|
| Rated output current | 27A |
| Maximum battery charge / discharge current | 125A / 135A |
| Maximum MPPT input power | 10,200W |
| Maximum PV access power | 12,000W |
| Maximum grid input current | 40A |
Shared technical specifications
| Battery compatibility | Lithium-ion and lead-acid |
|---|---|
| Rated battery voltage / voltage range | 48V DC / 40–60V DC |
| Maximum PV input voltage | 500V DC |
| Rated PV input voltage | 370V DC |
| MPPT voltage range | 60–450V DC |
| MPPTs / strings per MPPT | 1 MPPT / 2 strings |
| Maximum input current per MPPT | 28A |
| Maximum short-circuit current per MPPT | 35A |
| Nominal grid voltage | 220 / 230 / 240V AC ±5% |
| Grid input voltage range | 90–280V AC |
| Grid frequency | 50 / 60Hz |
| Rated output frequency | 50 / 60Hz ±0.1% |
| Transfer time | 10ms for computer equipment; 20ms for household equipment |
| Output THDv | Less than 3% |
| Maximum efficiency / MPPT efficiency | 97.0% / 99.9% |
| Surge protection | Type II DC and Type II AC |
| Operating temperature | -40°C to 60°C; derating above 45°C |
| Dimensions (W × H × D) | 395 × 485 × 156mm |
| Weight | 14.5kg |
| Topology / cooling | Non-isolated / smart cooling |
| Maximum altitude | 3,000m |
| Protection rating | IP66 |
| Communication | RS232, RS485, CAN, dry contact, external battery NTC, parallel communication; Wi-Fi optional |
| Manufacturer warranty stated in datasheet | 5 years |
Warranty & installation guidance
The datasheet lists a 5-year warranty and optional 10-year service. Optional service is not a standard 10-year warranty. Confirm local warranty and service terms with Japston Energy.
PV access power and MPPT input power are different ratings; both are listed for the selected model. This is an off-grid hybrid inverter. Grid input supports the stated operating functions and does not establish permission to export electricity or eligibility for net metering.
Specifications and product imagery are taken from the supplied AlpSolarr manufacturer datasheet. Product specifications may change; consult the original PDF and confirm the supplied model before ordering.