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ESI 12K-T1 is a 12 kW three-phase HV hybrid inverter with 3 MPPT inputs with AFCI (160-950 V, 20 A per input) and a three-phase backup output with 10 ms switchover that supports 100% unbalanced loads. It needs a high-voltage battery: the manufacturer specifies SOFAR BTS 5K modules (350-435 V), which are not included. Ingress protection IP66, weight 30 kg.
ESI 12K-T1 is a 12 kW three-phase high-voltage (HV) hybrid inverter with 3 MPPT inputs with AFCI, an integrated multi-function EMS and a three-phase backup output that supports 100% unbalanced loads. It is wall mounted and can form an integrated system with SOFAR BTS 5K batteries or be installed separately.
The inverter requires a high-voltage (HV) battery. According to the manufacturer documentation, SOFAR BTS 5K LiFePO4 modules of 5.12 kWh are used, up to 6 modules per inverter. The battery is not included in this product, and the system can also run without a battery, which can be added later. Maximum charging is 10 kW (25 A) and maximum discharging is 10 kW (30 A).
The backup output is three-phase, with a power equal to the rated power and a peak of 2 x rated power for 10 s. The inverter supports 100% unbalanced three-phase loads, and the unbalanced support function, in on-grid mode, tries to keep the power flows on the three phases balanced. The recommended PV power is up to 24 kWp, with an input current of up to 20 A per MPPT.
Interfaces: RS485, optional Wi-Fi, 4G or LAN, with an LCD and an app. Protections: AFCI on the PV inputs, DC switch, PV and battery reverse polarity, output short circuit, overcurrent and overvoltage, insulation monitoring, residual current, anti-islanding and type II surge protection on PV and AC. Natural cooling with no extra noise, ingress protection IP66.
| Recommended max. PV power | 24 kWp |
|---|---|
| Max. PV input voltage | 1000 V |
| Start-up voltage | 200 V |
| Rated input voltage | 600 V |
| MPP voltage range | 160-950 V |
| Number of MPPT | 3 |
| Max. strings per MPPT | 1/1/1 |
| Max. PV input current per MPPT | 20/20/20 A |
| Max. PV short-circuit current (Isc) | 25/25/25 A |
| AFCI protection | on the PV inputs, integrated |
| Battery voltage range | 350-435 V |
| Number of battery input channels | 1 |
| Max. charging power | 10 kW |
| Max. discharging power | 10 kW |
| Max. charging current | 25 A |
| Max. discharging current | 30 A |
| Battery type | Lithium-ion |
| BMS communication | CAN |
| Backup voltage and frequency | 3N~+PE, 380/400/415 V, 50/60 Hz |
| Rated backup power | 12 kW |
| Rated backup current (380/400/415 V) | 18.2/17.4/16.7 A |
| Max. backup apparent power | 13.2 kVA |
| Max. backup output current | 20.0/19.1/18.3 A |
| Peak backup apparent power | 2 x rated power, 10 s |
| Switching time | 10 ms |
| Asymmetric load | Yes, supports 100% three-phase unbalanced load |
| Grid voltage and frequency | 3(N)~+PE, 380/400/415 V, 50/60 Hz |
| Rated grid power | 12 kW |
| Max. grid output current (380/400/415 V) | 20.0/19.1/18.3 A |
| Max. AC input current (380/400/415 V) | 33.3/31.9/30.6 A |
| Power factor | 0.8 lagging - 0.8 leading |
| Max. MPPT efficiency | 99.9 % |
| Max. efficiency | 98.2 % |
| European efficiency | 97.5 % |
| Battery-AC efficiency, charging/discharging | 97.8 % |
| Ingress protection | IP66 |
| Operating temperature range | -30 ... 60 °C (derating above 45 °C) |
| Dimensions (W x H x D) | 708 x 440 x 170 mm |
| Weight | 30 kg |
| Communication | RS485; optional Wi-Fi, 4G or LAN |
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