Sigenergy
Sigenergy SigenStor
AI-optimised 5-in-1 modular system
The Sigenergy SigenStor is an AI-optimised, near-silent 5-in-1 system combining inverter, battery, gateway and energy management. Modular capacity means it scales with your needs, and automatic backup protects your home during outages.
Key features
- ✓AI-optimised energy management
- ✓5-in-1 modular design
- ✓Near-silent operation
- ✓Automatic backup
The Sigenergy SigenStor is one of the most talked-about home batteries we install across the South Coast, and for good reason. It's a genuine 5-in-1 system: the inverter, battery, gateway, power sensor and energy management all live in one sleek, near-silent stack rather than being bolted together from separate boxes. That means a tidier install in your garage, utility room or on an external wall, fewer components that can fail, and a system that's genuinely quiet enough to sit near living space. As a family-run, MCS-certified installer, we like kit that's clean to fit and dependable to live with, and the SigenStor ticks both boxes.
The stand-out feature is the modular, scalable design. Because the SigenStor stacks in battery modules, you can start with the capacity that matches your household today and add more later as your usage grows, an EV joins the driveway, or you add a heat pump. In our Standard solar-and-battery package we most commonly pair it as a 9kWh or 18kWh configuration, but the platform is built to scale beyond that. It's a sensible choice if you don't want to over-buy on day one but want the option to expand without ripping anything out.
Sigenergy's AI-optimised energy management is what sets it apart day to day. The system learns your household's patterns and works out the smartest way to charge from your panels, store cheap off-peak grid electricity, and discharge when it saves or earns you the most, all automatically. Paired with a Smart Export Guarantee tariff, that intelligence helps you shift usage into the cheapest windows and export at the right times, though of course suppliers set their own rates and we'll always talk you through realistic numbers rather than headline figures.
Because the SigenStor stores energy and can export, it's a G99 install: for any battery system, or anything larger than 3.68kW per phase, the DNO application goes in and is approved before we fit, and we handle that paperwork for you (SSEN across Hampshire, the Isle of Wight, Dorset and west Surrey; UK Power Networks across Sussex and most of Surrey). The system also provides automatic backup, so when there's a power cut it keeps your home running without you lifting a finger. Every SigenStor we fit is installed by our own MCS-certified team, and honestly, we'll always tell you if a simpler or lower-cost battery would serve you just as well.
Models we install
- SigenStor
- Sigen Energy Gateway
Specifications
| Brand | Sigenergy |
| System | SigenStor (with Sigen Energy Gateway) |
| Type | 5-in-1 modular hybrid (inverter, battery, gateway, sensor, management) |
| Design | Modular, stackable, scalable capacity |
| Common configurations | 9kWh and 18kWh (via our Standard package) |
| Energy management | AI-optimised, learns household usage |
| Operation | Near-silent, with automatic backup |
| Grid connection | G99 (DNO approval filed by SCSS before install) |
Pricing
A Sigenergy SigenStor system is available through our Standard solar-and-battery package: from £10,800 for 14 AIKO 475W panels with a 9kWh SigenStor, up to £13,500 for 16 panels with an 18kWh SigenStor. All prices are 'from' and subject to a free survey, with bird protection mesh included as standard.
Best for
Homeowners across Hampshire, the Isle of Wight, Dorset, Sussex and Surrey who want a tidy, near-silent all-in-one system and the freedom to scale storage up over time — ideal if you expect your energy needs to grow with an EV or heat pump, or you want smart AI-driven control paired with a Smart Export Guarantee tariff.
How it compares
Against a Tesla Powerwall 3, the SigenStor's big advantage is modularity: the Powerwall is a fixed 13.5kWh unit, whereas the SigenStor lets you right-size capacity now and expand later, and its 5-in-1 stack keeps everything in one place. Against budget options like Fox ESS, the Sigenergy costs more but brings tighter integration, AI-led optimisation and near-silent running. Verdict: choose the SigenStor if you value scalability, one-box neatness and intelligent management; choose a Powerwall if you want a proven fixed 13.5kWh backup with Tesla-app simplicity, or Fox ESS if keeping the upfront cost down matters most.
Sigenergy SigenStor: FAQs
What makes the Sigenergy SigenStor a '5-in-1' system?+
It combines the inverter, battery, gateway, power sensor and energy management in a single stacked unit, rather than several separate boxes wired together. That means a neater installation, fewer separate components, and near-silent operation.
Can I add more battery capacity later?+
Yes — the SigenStor is modular and scalable, so you can start with the capacity that suits your home now and add more storage as your needs grow, for example if you get an EV or a heat pump, without replacing the whole system.
How much does a Sigenergy system cost to install?+
Through our Standard solar-and-battery package it starts from £10,800 for 14 AIKO 475W panels with a 9kWh SigenStor, up to £13,500 for 16 panels with 18kWh. All prices are 'from' and confirmed after a free survey; bird protection mesh is included as standard.
Do I need permission from the network operator to install one?+
Yes. Because it's a battery system it needs a G99 connection, which means the application is submitted to and approved by your DNO before we install. We handle that paperwork for you — SSEN covers Hampshire, the Isle of Wight, Dorset and west Surrey, and UK Power Networks covers Sussex and most of Surrey.
Will it keep my home running during a power cut?+
Yes. The SigenStor provides automatic backup, so if the grid goes down it keeps your home powered from stored energy without you needing to do anything. The exact backup depends on your capacity and usage, which we'll size during your survey.
How does the AI energy management actually save me money?+
The system learns your household's usage patterns and automatically decides the smartest times to store solar, charge from cheap off-peak grid electricity, and discharge or export. Paired with a Smart Export Guarantee tariff it helps you use the cheapest energy and export at better times — though suppliers set their own rates, so we'll always give you realistic figures.
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