All-in-one energy storage system, US standard, 3.6–12 kW
Split-phase output, US service conventions and a battery inside the cabinet — 3.6 kW to 12 kW, 5 kWh to 32 kWh, for the North American residential market.
Product image
- Brand
- HighIdea
- Type
- All-in-one energy storage system, 120/240 V split-phase
- Typical applications
- US residential backup, off-grid homes, cabins, small commercial
- Models in range
- ESS HY 3.6kW+5kWh, ESS HY 3.6kW+8kWh, ESS HY 4kW+5kWh, ESS HY 4kW+8kWh, ESS HY 7.2kW+16kWh, ESS HY 7.2kW+10kWh, ESS HY 12kW+16kWh, ESS HY 12kW+21kWh, ESS HY 12kW+32kWh
- Category
- All-in-One ESS
Split-phase in one cabinet
North American residential power is two live legs and a neutral, not a single 230 V phase. An all-in-one cabinet sold into that market has to produce 120/240 V split-phase, carry the neutral imbalance, and satisfy a utility that usually prohibits export.
This series does that with the same integrated approach as the EU platform: 3.6 kW to 12 kW, 5 kWh to 32 kWh, inverter and battery in one enclosure, with the anti-reflux CT fitted as standard.
Cabinet formats
The 3.6 kW and 4 kW units are wall-mounted and suit a garage or a utility room. The 7.2 kW and 12 kW units are floor-standing cabinets with larger batteries, for a whole-house installation or a small business.
Model range
| Model | Rated output | Battery | Variant |
|---|---|---|---|
| ESS HY 3.6kW+5kWh | 3.6 kW | 5 kWh | 3.6 kW wall unit |
| ESS HY 3.6kW+8kWh | 3.6 kW | 8 kWh | 3.6 kW wall unit |
| ESS HY 4kW+5kWh | 4 kW | 5 kWh | 4 kW wall unit |
| ESS HY 4kW+8kWh | 4 kW | 8 kWh | 4 kW wall unit |
| ESS HY 7.2kW+16kWh | 7.2 kW | 16 kWh | 7.2 kW + 16 kWh |
| ESS HY 7.2kW+10kWh | 7.2 kW | 10 kWh | 7.2 kW cabinet |
| ESS HY 7.2kW+16kWh | 7.2 kW | 16 kWh | 7.2 kW cabinet |
| ESS HY 12kW+16kWh | 12 kW | 16 kWh | 12 kW cabinet |
| ESS HY 12kW+21kWh | 12 kW | 21 kWh | 12 kW cabinet |
| ESS HY 12kW+32kWh | 12 kW | 32 kWh | 12 kW cabinet |
| ## Specifications by variant |
4 kW wall unit
| Parameter | ESS HY 4kW+5kWh | ESS HY 4kW+8kWh |
|---|---|---|
| PV Input Max. Input Capacity (W) | 5000 | — |
| Open Circuit Voltage (VDC) | 500 | — |
| MPPT Voltage (VDC) | 60~450 | — |
| PV Input Current (A) | 18 | — |
| PV Input Short-circuit Current (A) | 22 | — |
| Rated Input Voltage (VAC) | 120Vac±5%；L+N+PE | — |
| Voltage Range (VAC) | (90Vac~140Vac)±2% | — |
| Frequency (Hz) | 50Hz/60Hz (Auto Detect) | — |
| Bypass Input Current | 40A | — |
| Rated Capacity (kVA) | 4000( ： kVA, 4000) | — |
| Voltage (VAC) | 100/110/120/127 | — |
| Frequency (Hz) | 50/60Hz | — |
| Wave Form | Pure Sine Wave | — |
| Motor Load Performance | 2HP | — |
| Battery Mode Overload Capacity | 1min@102%~120%Load; 10s@120%~200%Load | — |
| Battery Mode Max Efficiency | 92.6% | — |
| Switch Time (ms) | < 10 | — |
| Nominal Voltage | 25.6VDC | 25.6VDC |
| Nominal Energy | 5kWh(0.2C, 25 °C) | 8kWh(0.2C, 25 °C) |
| Usable Energy(90%DOD) | 4.5kWh | 7.2kWh |
| Max AC Charge Current (A) | 100 | — |
| Max. PV Charge Current (A) | 100 | — |
| Max Charge Current (PV+AC) (A) | 100 | — |
| Operating Voltage Range | 21.6Vdc ~ 29.2Vdc | — |
| reveal | LCD | — |
| communication | USB/RS485 | — |
| Monitoring | WIFI | — |
| Ingress Protection | IP20 | — |
| Operating Temperature | Charge0 °C～+55 °C;Discharge-20 °C～+55 °C | — |
| Relative Humidity | 5%～95% (Non-condensing) | — |
| Max Operating Altitude | 4000m (Derating above 2000m) | — |
| LxWxH (products size, mm) | 440x246x760 mm | 440x246x760 mm |
| LxWxH (package size, mm) | 520x436x890 mm | 520x436x890 mm |
| Weight (NW Kg) | 64 | 75 |
| Weight (GW Kg) | 76 | 88 |
| Quantity 20GP | 120 | 120 |
| Quantity 40GP | 260 | 260 |
| Quantity 40HQ | 260 | 260 |
- Inverter + BMS + Battery, integrated design
- Built-in solar inverter
- Support solar charging
- Feed-in to Grid
7.2 kW + 16 kWh
| Parameter | ESS HY 7.2kW+16kWh |
|---|---|
| PV Input Max. Input Capacity (W) | 4500W+4500W |
| Open Circuit Voltage (VDC) | 500Vdc |
| MPPT Voltage (VDC) | 90Vdc~450Vdc |
| PV Input Current (A) | 16A |
| Number of MPPT Trackers | 2 |
| Rated Input Voltage (VAC) | 120(L1/N, L2/N) / 240Vac(L1/L2) |
| Voltage Range (VAC) | 90~140vac ±2% |
| Frequency (Hz) | 50Hz/60Hz (Auto Detect) |
| Bypass Input Current | 2-pole, 40A/40A (L1/L2) |
| Rated Capacity (kVA) | Split-phase 7200; Single-phase 6000 |
| Voltage (VAC) | 120Vac(L1/N, L2/N)/240Vac(L1/L2) |
| Frequency (Hz) | 50/60 ±0.3Hz |
| Wave Form | Pure Sine Wave |
| Motor Load Performance | 4HP |
| Battery Mode Overload Capacity | 5min@102%~110%Load; 10s@110%~125%Load; 5s@Load>125% |
| Battery Mode Max Efficiency | 91% |
| Switch Time (ms) | < 10 |
| Nominal Voltage | 51.2VDC |
| Nominal Energy | 16.07(0.5C, 25 °C) |
| Usable Energy(90%DOD) | 14.46kWh |
| Max AC Charge Current (A) | 150 |
| Max. PV Charge Current (A) | 150 |
| Max Charge Current (PV+AC) (A) | 150 |
| Operating Voltage Range | 43.2Vdc~58.4Vdc |
| reveal | LCD |
| communication | USB/RS485/WiFi/GPRS/Dry Contact Control |
| Monitoring | WIFI |
| Ingress Protection | IP20 |
| Operating Temperature | Charge0 °C～+55 °C;Discharge-20 °C～+55 °C |
| Relative Humidity | 5%～ 95% (Non-condensing) |
| Max Operating Altitude | 4000m (Derating above 2000m) |
| LxWxH (products size, mm) | 460x430x736 mm |
| LxWxH (package size, mm) | 540x510x895 mm |
| Weight (NW Kg) | 136 |
| Weight (GW Kg) | 159 |
| Quantity 20GP | 80 |
| Quantity 40GP | 160 |
| Quantity 40HQ | 160 |
- Inverter + BMS + Battery, integrated design
- Built-in solar inverter
- Support solar charging
- Feed-in to Grid
7.2 kW cabinet
| Parameter | ESS HY 7.2kW+10kWh | ESS HY 7.2kW+16kWh |
|---|---|---|
| PV Input Max. Input Capacity (W) | 4500W+4500W | — |
| Open Circuit Voltage (VDC) | 500Vdc | — |
| MPPT Voltage (VDC) | 90Vdc~450Vdc | — |
| PV Input Current (A) | 16A | — |
| Number of MPPT Trackers | 2 | — |
| Rated Input Voltage (VAC) | 120(L1/N, L2/N) / 240Vac(L1/L2) | — |
| Voltage Range (VAC) | 90~140vac ±2% | — |
| Frequency (Hz) | 50Hz/60Hz (Auto Detect) | — |
| Bypass Input Current | 2-pole, 40A/40A (L1/L2) | — |
| Rated Capacity (kVA) | Split-phase 7200; Single-phase 6000 | — |
| Voltage (VAC) | 120Vac(L1/N, L2/N)/240Vac(L1/L2) | — |
| Frequency (Hz) | 50/60 ±0.3Hz | — |
| Wave Form | Pure Sine Wave | — |
| Motor Load Performance | 4HP | — |
| Battery Mode Overload Capacity | 5min@102%~110%Load; 10s@110%~125%Load; 5s@Load>125% | — |
| Battery Mode Max Efficiency | 91% | — |
| Switch Time (ms) | < 10 | — |
| Nominal Voltage | 51.2VDC | 51.2VDC |
| Nominal Energy | 10.24(0.5C, 25 °C) | 16.07(0.5C, 25 °C) |
| Usable Energy(90%DOD) | 9.2kWh | 14.46kWh |
| Max AC Charge Current (A) | 150 | — |
| Max. PV Charge Current (A) | 150 | — |
| Max Charge Current (PV+AC) (A) | 150 | — |
| Operating Voltage Range | 43.2Vdc~58.4Vdc | — |
| reveal | LCD | — |
| communication | USB/RS485/WiFi/GPRS/Dry Contact Control | — |
| Monitoring | WIFI | — |
| Ingress Protection | IP20 | — |
| Operating Temperature | Charge0 °C～+55 °C;Discharge-20 °C～+55 °C | — |
| Relative Humidity | 5%～ 95% (Non-condensing) | — |
| Max Operating Altitude | 4000m (Derating above 2000m) | — |
| LxWxH (products size, mm) | 460x245x1110mm | 550x245x1180mm |
| LxWxH (package size, mm) | 540x420x1180mm | 630x420x1264mm |
| Weight (NW Kg) | 108 | 146 |
| Weight (GW Kg) | 126 | 168 |
| Quantity 20GP | 80 | 60 |
| Quantity 40GP | 180 | 130 |
| Quantity 40HQ | 200 | 150 |
- Inverter + BMS + Battery, integrated design
- Built-in solar inverter
- Support solar charging
- Feed-in to Grid
12 kW cabinet
| Parameter | ESS HY 12kW+16kWh | ESS HY 12kW+21kWh | ESS HY 12kW+32kWh |
|---|---|---|---|
| PV Input Max. Input Capacity (W) | 6000W+6000W | — | — |
| Open Circuit Voltage (VDC) | 500Vdc | — | — |
| MPPT Voltage (VDC) | 90Vdc~450Vdc | — | — |
| PV Input Current (A) | 22A | — | — |
| Number of MPPT Trackers | 2 | — | — |
| Rated Input Voltage (VAC) | 120(L1/N, L2/N) / 240Vac(L1/L2) | — | — |
| Voltage Range (VAC) | 90~140vac ±2% | — | — |
| Frequency (Hz) | 50Hz/60Hz (Auto Detect) | — | — |
| Bypass Input Current | 2-pole, 40A/40A (L1/L2) | — | — |
| Rated Capacity (kVA) | Split-phase 12000; Single-phase 7200 | — | — |
| Voltage (VAC) | 120Vac(L1/N, L2/N)/240Vac(L1/L2) | — | — |
| Frequency (Hz) | 50/60 ±0.3Hz | — | — |
| Wave Form | Pure Sine Wave | — | — |
| Motor Load Performance | 6HP | — | — |
| Battery Mode Overload Capacity | 5min@102%~110%Load; 10s@110%~125%Load; 5s@Load>125% | — | — |
| Battery Mode Max Efficiency | 91% | — | — |
| Switch Time (ms) | < 10 | — | — |
| Nominal Voltage | 51.2VDC | 51.2VDC | 51.2VDC |
| Nominal Energy | 16kWh(0.5C, 25 °C) | 21kWh(0.5C, 25 °C) | 32kWh(0.5C, 25 °C) |
| Usable Energy(90%DOD) | 14.4kWh | 18.9kWh | 28.8kWh |
| Max AC Charge Current (A) | 160 | — | — |
| Max. PV Charge Current (A) | 220 | — | — |
| Max Charge Current (PV+AC) (A) | 220 | — | — |
| Operating Voltage Range | 43.2Vdc~58.4Vdc | — | — |
| reveal | LCD | — | — |
| communication | USB/RS485/WiFi/GPRS/Dry Contact Control | — | — |
| Monitoring | WIFI | — | — |
| Ingress Protection | IP20 | — | — |
| Operating Temperature | Charge0 °C～+55 °C;Discharge-20 °C～+55 °C | — | — |
| Relative Humidity | 5%～ 95% (Non-condensing) | — | — |
| Max Operating Altitude | 4000m (Derating above 2000m) | — | — |
| LxWxH (products size, mm) | 550x245x1230mm | 550x245x1400mm | 595x298x1550mm |
| LxWxH (package size, mm) | 630x420x1314mm | 630x450x1480mm | 755x480x1630mm |
| Weight (NW Kg) | 151 | 186 | 248 |
| Weight (GW Kg) | 172 | 215 | 302 |
| Quantity 20GP | 60 | 55 | 36 |
| Quantity 40GP | 130 | 120 | 84 |
| Quantity 40HQ | 156 | 120 | 105 |
- Inverter + BMS + Battery, integrated design
- Built-in solar inverter
- Support solar charging
- Feed-in to Grid
Key Features
- 3.6 kW to 12 kW output, 5 kWh to 32 kWh battery
- 120/240 V split-phase output for US panels
- Inverter, BMS and LiFePO4 battery in one cabinet
- Anti-reflux CT and zero-export configuration
- Wall-mounted and floor-standing cabinet options
- Solar MPPT input with dual channels on the larger models
- 10 ms transfer for critical loads
- App and cloud monitoring
Applications
US residential backup
Feeds a split-phase panel directly, with the CT holding export at zero where the utility requires it.
Cabins and off-grid homes
3.6 kW with 5–8 kWh covers lights, a fridge and a well pump in a cabin.
Small commercial
12 kW with 32 kWh covers a shop or a clinic through an outage, with the 240 V loads unaffected.
FAQ
Does it supply 240 V loads?
Yes — L1 and L2 are 180° apart, so 240 V loads such as a well pump or a dryer run directly. The neutral carries the imbalance.
What is the difference from the EU-standard version?
Output topology and certification. The US models produce 120/240 V split-phase; the EU models produce 220/230 V single-phase.
Can it export to the grid?
It can, but most US installations set zero export with the supplied CT. Confirm the utility's requirement before commissioning.
Is the battery replaceable?
Yes, as a module. The cabinet opens from the front and the battery is a serviceable part rather than a sealed assembly.
Specification reference
| Rated output | 3.6 kW to 12 kW |
|---|---|
| Battery capacity | 5 kWh to 32 kWh |
| Battery chemistry | LiFePO4 |
| Grid output | 120 / 240 V split-phase, 60 Hz |
| Export control | Anti-reflux CT supplied |
| Backup transfer | Under 10 ms |
| Mounting | Wall bracket (3.6 / 4 kW), floor cabinet (7.2 / 12 kW) |
Specifications subject to the latest factory data. Final configuration is sized against the actual load, backup runtime and site power conditions — this table is for pre-selection only.
Specifications subject to the latest revision; need other technical documents? Ask our engineers.