Overview
Sigenergy is a Chinese manufacturer that entered the Australian market in 2023 with a genuinely differentiated product: a battery system that supports V2H (vehicle-to-home) bidirectional charging at 25kW — far above the 3.6–7.4kW offered by competing products. For households with a compatible EV, the SigenStor SP transforms their car into a 60–100kWh backup generator that can power the house during extended outages.
The SigenStor SP 16kWh (nominal 15.6kWh usable) costs $7,700 and combines with Sigenergy’s hybrid inverter for a complete solar-storage-V2H platform. It is both AC and DC coupled, meaning it can be retrofitted to existing solar systems or built into a new installation.
Pricing & Installation
Indicative installed cost: $11,500–$15,500
The battery unit at $7,700 pairs with a Sigenergy inverter. V2H module adds approximately $3,000–$5,000 to the system cost. The total V2H-enabled system can represent $20,000+ installed — however, for households with compatible EVs (BYD, Nissan Leaf, Mitsubishi Outlander PHEV and others), the EV battery essentially becomes a massive free storage upgrade.
Note: the 2024 voluntary recall affected early SP units with a specific battery management firmware version. All units shipped from mid-2024 include updated hardware. Confirm with your installer that supplied stock is post-recall compliant.
Performance & Output
5kW continuous / 10kW peak from the battery itself. With the V2H module engaged and a compatible EV connected, discharge capability scales to 25kW — enough to run whole-home loads including ducted HVAC, pool pumps, and fast EV charging simultaneously.
Round-trip efficiency is 95% — strong and consistent with LFP chemistry.
Storage Capacity
At 15.6kWh, the SP comfortably covers most households’ overnight consumption. Modular expansion up to 54kWh (9 modules) provides exceptional future-proofing. Few competing batteries scale this high in a single coherent system.
Backup & Blackout Protection
Grid-forming capability via the Sigenergy inverter enables immediate sub-20ms switchover during outages. The V2H option is the game-changer: a 60kWh EV battery + 15.6kWh stationary storage = 75.6kWh total backup reserve, providing days of autonomy for most households.
IP66 rating — protected against powerful water jets — makes outdoor installation in exposed locations straightforward.
Compatibility
AC+DC coupling flexibility is a meaningful advantage. The SP can be:
- DC-coupled in new solar builds for highest efficiency
- AC-coupled onto existing solar systems from any inverter brand
This removes the inverter-lock-in constraint common to DC-only competitors.
V2H compatible vehicles in Australia include: BYD Atto 3, BYD Seal, BYD Sealion, Nissan Leaf (second gen), Mitsubishi Outlander PHEV, and select other models — check the Sigenergy compatibility list for your specific EV.
Warranty & Support
10-year product warranty. Sigenergy’s Australian distributor has expanded significantly in 2025–26 with growing coverage in VIC, NSW, QLD, SA and WA.
Verdict
The SigenStor SP is the most forward-thinking battery in this comparison for households with or planning an EV. Its V2H capability is unique, its coupling flexibility is genuine, and the recall issue is thoroughly behind it. Single-phase households considering the SP should also note the three-phase TP variant for higher output applications.
Best for: EV owners, large households, those wanting maximum backup capability and future V2H upgradeability.
Frequently Asked Questions
What EVs support V2H with the SigenStor? BYD Atto 3, Seal, Sealion 7; Nissan Leaf (40kWh+); Mitsubishi Outlander PHEV; Hyundai Ioniq 5 (V2L adaptor). Check Sigenergy’s compatibility list at installation.
Was the recall serious? The 2024 recall was a precautionary firmware-related action. No fires or injuries were reported. All replacement units have updated hardware with enhanced BMS monitoring.
What is the SP vs TP difference? SP = single-phase, 5kW continuous. TP = three-phase, 10kW continuous. Three-phase homes should select the TP (reviewed separately).
