The KSTAR BlueSpark Series Residential Energy Storage System (ESS) is an advanced, single-phase, all-in-one hybrid solution designed to optimize home energy management and significantly lower electricity bills. Featuring versatile inverter models—E3.68KS-D22, E5KS-D22, and E6KS-D22—the system provides a flexible continuous AC output ranging from 3.68 kW to 6 kW. Powered by premium EVE/CATL LFP (LiFePO4) cells, the system features the BP48100PF1A-G2 battery pack, delivering a 5.12 kWh capacity with a 100% depth of discharge and a remarkable DC/AC ratio of up to 2. Its modular design allows for effortless, flexible expansion, supporting up to 4 battery packs per system. The BlueSpark Series stands out for its tool-free, no-wiring stackable installation and highly durable IP66-rated protection. Equipped with smart scheduling modes (including peak shaving and self-consumption) and SG Ready heat pump compatibility, it ensures smart operations. Homeowners can also benefit from 24/7 cloud monitoring, Bluetooth commissioning, and reliable on/off-grid parallel power backup.

Key Features

Extreme Safety & Reliability

Human-safe low-voltage solution to minimize operation risks Optional AFCI (Arc Fault Circuit Interrupter) to actively avoid fire risks IP66 inverter and IP65 battery protection for harsh outdoor environments

Versatile Adaptability & Expansion

Supports both on-grid and off-grid parallel configurations Flexible capacity scalability supporting up to 8 battery packs per system (up to 800Ah / 40.96 kWh) Tool-free stackable design with no external wiring required for compact, space-saving installation

Intelligent Management & O&M

24/7 cloud monitoring and remote firmware upgrades (OTA) Easy on-site commissioning via Bluetooth connection Multi-mode energy scheduling covering Self-Consumption, Peak Shaving, Time-of-Use, and Battery Priority Smart home integration compatible with SG Ready Heat Pumps

High Performance

High PV-to-inverter capability with a DC/AC ratio up to 2 Premium LFP cells (powered by EVE/CATL) ensuring long battery cycle life Power tiers covering 3.68 kW, 5 kW, and 6 kW to match standard residential needs