Description
This package pairs the Solis 10kW or 15kW three-phase hybrid PLUS inverter with the Fogstar Energy modular battery stack, a single integrated battery system of 3 or 4 stacked 16.1kWh modules managed by one top-mounted control unit. Multiple stacks can run in parallel for serious capacity, all the way up to 257.6kWh on this listing.
This is a kit aimed at properties on a three-phase incoming supply: large homes, farms, workshops, light commercial sites, or anywhere with heavy three-phase loads. The S6 three-phase platform brings dual backup ports, generator integration and microgrid capability when paralleled, while the Fogstar stack adds IP65 outdoor-capable construction, integrated fire suppression, self-heating to -15°C, and a built-in 350A isolation breaker for proper service-grade isolation.
Solis S6 10 / 15kW Three-Phase Hybrid PLUS Inverter, key features:
- Three-phase low-voltage hybrid, sized 10kW or 15kW
- AI-optimised cloud-based energy management assistant
- Dual backup ports for intelligent separation of critical and non-critical loads
- Generator compatibility for extended backup duration
- 200% overload capability for up to 10 seconds to handle high inrush loads
- Stable operation during weak grid or generator fluctuations
- Up to 20A maximum PV input current, compatible with high-current panels from all major manufacturers
- Battery DC charge / discharge up to 290A for high-power energy cycling
- Multi-inverter microgrid capability for scalable installations
- Supports unbalanced and half-wave loads on grid and backup ports
- Increased self-consumption of solar energy through intelligent charge / discharge scheduling
Fogstar Energy Modular Battery Stack (FE51.2-48.3), key features:
- 51.2V nominal low-voltage LiFePO₄ system
- 48.3kWh per stack (3 × 16.1kWh modules) or 64.4kWh per stack (4 × 16.1kWh modules)
- Single top-mounted control unit manages the whole stack as one battery
- Built-in 350A isolation breaker for full system isolation in maintenance, fault or emergency conditions
- 300A maximum charge and discharge current per stack
- IP65 rated, suitable for indoor, plant room or outdoor wall installation
- Integrated, heat-activated aerosol fire suppression system as standard
- Built-in battery heating allowing safe charging down to -15°C, ideal for UK garages, outbuildings and unheated plant rooms
- JK 2A active cell balancing for long-term cell equalisation
- Heavy-duty base plate, robust sealed enclosure
- Scalable to multiple stacks in parallel, up to 257.6kWh on this listing and 1.23MWh on the platform
- 6-year manufacturer warranty plus 10 years of UK-based customer support
What you get with this package:
- Solis S6 three-phase hybrid PLUS inverter in your chosen size (10kW or 15kW)
- Fogstar Energy modular battery stack at your chosen capacity (48.3kWh, 64.4kWh, 128.8kWh, 193.2kWh or 257.6kWh)
- Three-phase grid meter for live energy monitoring
- Full design, supply and installation by our MCS-accredited engineers
- DNO application and G99 / G100 paperwork handled for you
- All cabling, isolators, mounting and commissioning included
- Handover walk-through and app setup on the day
- Installation anywhere in the Midlands included in the price
Why people choose this kit:
- Up to 257.6kWh of usable storage on a single inverter, suitable for large homes, farms, workshops and small commercial buildings.
- Three-phase architecture means balanced loading across all phases, which keeps voltages cleaner and protects sensitive equipment.
- One integrated battery stack instead of multiple loose units: cleaner installation, simpler comms, less to maintain.
- Dual backup ports let you prioritise critical circuits (lighting, fridge, internet, alarm) over non-critical ones (EV charger, immersion) during a power cut.
- Generator port and microgrid support give genuine off-grid and resilience options.
- IP65 rating means each stack can mount outside on a wall or in an unheated plant room.
- Built-in 350A breaker on each stack gives proper isolation for service work without separate external switchgear.
- Fire suppression and -15°C self-heating come as standard on the Fogstar stack.
- AI optimisation learns your usage and your tariff so the system runs itself after the first week.
- Lithium iron phosphate (LFP) chemistry is safer and longer-cycling than older NMC packs.
- 6-year manufacturer warranty plus 10 years of UK-based support on the battery.
What’s included in the install:
- Site survey and electrical assessment, including three-phase supply check
- Wall or floor mounting of the inverter and battery stacks
- AC, DC and comms wiring to your three-phase consumer unit
- Grid metering for live energy monitoring
- System commissioning and app pairing
- Customer handover and aftercare contact
Coverage: Midlands installation included in the price.
Battery warranty: Fogstar Energy modular stack: 6-year manufacturer warranty plus 10 years of UK-based customer support.
Note: This kit requires a three-phase incoming supply at the property. If your home or site is currently single-phase, your DNO will need to upgrade your service before installation. We will flag this during the site survey. The Fogstar modular battery stack is also currently on pre-order with stock expected at the start of June. Order now to reserve your slot in our install schedule.
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