ST-BD2000-48P — 2 kW 48 V Bidirectional Inverter-Charger with Solar MPPT
Pure-Sine, Grid-Stable, Efficient.
Technical Specifications
18 months from date of invoice.
Detailed Specifications
PARAMETERS
| PARAMETER | VALUE |
|---|---|
| Rated Output Power | 2000 W |
| Charging Power | 2000 W |
| Peak / Overload Power | Up to 200% (4000 W) for 200 ms; 150% 2 s; 125% 5 s; 110% 20 s |
| DC Discharge / Battery Range | 40–59.5 Vdc (48 V class) |
| AC Output Voltage | 100/110/120/220/230/240 Vac (selectable) |
| AC Output Frequency | 50 / 60 Hz |
| Output Waveform | Pure sine wave |
| Output THD (THDv) | < 3% |
| Inverter Efficiency | ≤ 91% @120 Vac; ≤ 93% @220 Vac |
| AC Input Voltage | 90–264 Vac |
| AC Frequency Range | 47–63 Hz |
| Max AC Input Current | 15 A |
| Power Factor | 0.99 @100% load |
| Input THD (THDi) | < 5% @100% load |
| Max Charging Current | 41.6 A |
| Charging Voltage Range | 40–59.5 Vdc |
| Charging Management | Host-managed (RS485) |
| Output Voltage Ripple | ≤ 700 mV (0–20 MHz) |
| AC Bypass Current | ≤ 18 A |
| Bypass Switching Time | ~20 ms (typical) |
| Parallel Operation | Not supported |
| Cooling | Forced air cooling (dual fan) |
| Operating Temperature | -25 °C to +70 °C (derate above 45 °C) |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | ≤ 95% RH, non-condensing |
| Altitude | 2000 m (derate above) |
| Atmospheric Pressure | 79–106 kPa |
| Response Time | ≤ 10 s (command-to-output) |
| Noise | ≤ 45 dB @1 m |
| Insulation Resistance | ≥ 10 MΩ |
| Leakage Current | ≤ 10 mA |
| Ground Resistance | ≤ 0.1 Ω (withstand ≥ 50 A) |
| EMC | EN 55032 / EN 55035, IEC 61000-3-2 / -3 |
| MTBF | 250,000 h @25 °C, 80% load |
| Dimensions (L×W×H) | 258 × 161 × 55 mm (body width 153 mm) |
| Weight | ≤ 2.3 kg |
| MPPT Input Voltage | ≤ 59 Vdc |
| MPPT Input Current | ≤ 12.5 A |
| MPPT Input Power | ≤ 500 W |
| MPPT Tracking Efficiency | 99.9% (EN 50530) |
| MPPT Conversion Efficiency | ≤ 97% |
| MPPT Output Current | 11 A |
INTERFACE
| INTERFACE | VALUE |
|---|---|
| AC Input | PE / L / N |
| AC Output (UPS) | L / N |
| DC / Battery | + / − (battery charge/discharge) |
| Solar / MPPT Input | + / − (PV panel) |
| RS485 | RS485_A / RS485_B (host-managed, Modbus) |
| CAN | CANH / CANL (reserved, not populated by default) |
| Control | BATT_ON inverter-enable, +5 V aux, GND |
PROTECTIONS
| PROTECTION | DESCRIPTION |
|---|---|
| Overload | 110% 20 s / 125% 5 s / 150% 2 s / 200% 200 ms, then shutdown |
| MPPT Over-voltage | Trips at 61 Vdc; recovery at 59.5 Vdc |
| MPPT Under-voltage | Trips at 8 Vdc; recovery at 11 Vdc |
| MPPT Short-circuit | Output current locked at 3 A |
| Over-temperature | MPPT-stage OTP supported; whole-unit thermal derate above 45 °C |
| Insulation / dielectric | AC↔housing 1500 Vac, AC↔DC 3000 Vac, 60 s, leakage < 1 mA |
FEATURES
| FEATURE | VALUE |
|---|---|
| Cooling | Forced air (dual fan); MPPT sub-stage natural convection |
| Bidirectional | Inverter (DC→AC) + charger/rectifier (AC→DC) |
| Solar MPPT | Integrated 500 W input, 99.9% tracking (EN 50530) |
| UPS bypass | AC bypass ≤ 18 A, ~20 ms transfer |
| Battery compatibility | 48 V lithium / LiFePO₄ pack (40–59.5 Vdc) |
| Topology | Soft-switching high-frequency, galvanically isolated |
Additional Details
The ST-BD2000-48P is a 2 kW, 48 V bidirectional inverter-charger module that combines three functions in a single 258 × 161 × 55 mm package: a pure sine-wave inverter (DC→AC), a high-power AC-input charger/rectifier (AC→DC), and an integrated 500 W solar MPPT input. AC output is region-selectable across 100/110/120/220/230/240 Vac at 50/60 Hz with THD < 3%.
A host controller manages charge/discharge over RS485 (CAN is reserved on the connector). The unit supports UPS-style bypass with ~20 ms transfer, soft-switching for high efficiency (≤91% @120 Vac, ≤93% @220 Vac), and the MPPT stage tracks at 99.9% per EN 50530. Designed as an OEM building block for off-grid, backup and portable energy-storage systems built around a 48 V lithium or LiFePO₄ pack.
Frequently asked questions
What is the ST-BD2000-48P — 2 kW 48 V Bidirectional Inverter-Charger with Solar MPPT?
The ST-BD2000-48P is a 2 kW, 48 V bidirectional inverter-charger module with an integrated solar MPPT input — pure sine-wave AC output, AC-input charging and battery charge/discharge in one unit for off-grid and backup energy-storage systems.
What are the key specifications of the ST-BD2000-48P?
Output — 2 kW · 220 Vac pure-sine · 48 Vdc · ≤93% · bidirectional + MPPT. Input — AC 90–264 Vac, 47–63 Hz, PF 0.99, THDi <5% · DC 40–59.5 Vdc (48 V) · PV/MPPT ≤59 Vdc, ≤500 W.
What communication interfaces does the ST-BD2000-48P support?
RS485 (host-managed); CAN reserved (CANH/CANL); BATT_ON enable + 5 V aux.
What protection features does the ST-BD2000-48P include?
Built-in protections: Overload, MPPT Over-voltage, MPPT Under-voltage, MPPT Short-circuit, Over-temperature, Insulation / dielectric.
What is the warranty on the ST-BD2000-48P?
18 months from date of invoice.
