The Sigenergy SigenStor system is a cutting-edge energy storage solution that has rapidly gained popularity and recently become one of the most sought-after systems in Australia, the UK, and Europe. With its impressive feature set, including vehicle-to-home (V2H) bidirectional EV charging, it stands out as one of the most innovative products to hit the market in recent years. Notably, Sigenergy is the first company to release a fully integrated hybrid system that combines solar, battery storage, and bidirectional EV charging into a single unit.
At its core is the hybrid inverter, available in single-phase and three-phase models ranging from 5kW to 25kW. All inverters support 200% solar oversizing. The smaller 5kW and 6kW models come equipped with two MPPTs, enabling two separate solar panel strings, while the larger 8kW and 10kW single-phase models feature three or four MPPTs, offering greater flexibility for system design.
The battery modules, available in 5kWh and 8kWh capacities, can be stacked to provide a maximum storage capacity of 48kWh when using the larger 8kWh units. These modules operate in parallel, not series like most other high-voltage systems, enabling each battery to be managed independently and avoiding issues with mixing new and old batteries when adding extra capacity.
The additional Gateway Backup Box is required to enable backup power and provide uninterrupted power supply (UPS) functionality. It also features smart load connections to manage power consumption on specific circuits like hot water systems. The Gateway also enables the system to operate as a stand-alone (off-grid) power system by enabling the connection of a backup generator.
Bidirectional EV charging
The most exciting feature is the optional bidirectional EV charger, available in 12.5kW single-phase and 25kW three-phase models. Unlike traditional AC chargers, the SigenStor system is directly connected to the DC power bus, enabling direct DC EV charging from solar. This eliminates the limitations imposed by a vehicle’s onboard AC charger and allows for more efficient energy transfer. Due to most countries and EVs still not approving Vehicle-to-grid (V2G) connections, the bidirectional EV charger functionality is limited to Vehicle-to-home (V2H) usage, enabling EV battery power to power your home if required.
Pros:
-
Fully integrated system combining solar, battery storage, and bidirectional EV charging in a single unit.
-
200% solar oversizing capability and up to 4 MPPTs to optimise solar generation.
-
Modular battery design allows for flexible expansion up to 48kWh.
-
DC power bus enables direct solar-to-EV charging, eliminating the limitations of AC charging.
-
DC-DC optimizer allows mixed battery configurations, supporting different capacities and SOH/SOC.
-
Advanced safety features, including temperature management, fire suppression, and insulation protection.
-
Off-grid and UPS functionality for uninterrupted backup power when paired with the Gateway Backup Box.
Cons:
-
Limited Installation location — the system must be installed close to the EV parking location due to charging cable length restrictions.
-
Backup power requires the additional Gateway Backup Box.
