KSTAR BlueSpark E4–12KT-D22 — three-phase energy storage system, 4–12 kW

Supplied as an official KSTAR partner

Manufacturer: KSTAR · China · Model: BlueSpark E4–12KT-D22

The BlueSpark E4–12KT-D22 three-phase home energy storage system consists of a 4–12 kW hybrid inverter and up to 8 modular LFP batteries of 5.12 kWh each. It is meant for houses that need backup power and self-consumption of solar energy.

Hybrid inverter: E4/5/6KT-D22, E8/10/12KT-D22
Battery: BP48100PF1A-G2, LFP, 5.12 kWh (usable 4.6 kWh), IP65
Batteries per system: up to 8
Max. PV efficiency: 96.6–97.2 %

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Technical specifications

Hybrid inverter	E4/5/6KT-D22, E8/10/12KT-D22
Battery	BP48100PF1A-G2, LFP, 5.12 kWh (usable 4.6 kWh), IP65
Batteries per system	up to 8
Max. PV efficiency	96.6–97.2 %
Inverter ingress protection	IP66
Functions	per-phase power control, diesel generator control, parallel on/off-grid operation

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

The inverter comes in the E4/5/6KT-D22 and E8/10/12KT-D22 models and is rated IP66. The BP48100PF1A-G2 battery on LFP chemistry has 5.12 kWh of nominal capacity, of which 4.6 kWh is usable, and an IP65 enclosure. Maximum PV efficiency is 96.6–97.2 %. The system can control power phase by phase, that is, balance the load on each of the three phases. It is a hybrid scheme in which the inverter manages PV, batteries and grid together. Diesel generator control and parallel operation in on-grid and off-grid modes are provided.

How to choose

The inverter model sets the power, the number of batteries, up to 8, sets the capacity. For a single-phase grid there is the BlueSpark E3.68–6KS-D22 at 3.68–6 kW with up to 4 batteries, whose battery cycle efficiency exceeds 94 %. The Home Series HH at 3.6–10 kW uses H-PACK 5.12 kWh batteries, with IP20 for the inverter and IP21 for the battery. For commercial sites look at the BluePulse at 20–125 kW, scalable to 1 MW / 4 MWh.