Products — Sigenergy
SigenStor — the battery-inverter tower
Battery modules come in 6 kWh and 9 kWh sizes and stack in one tower, with the hybrid inverter built in — and an optional DC module for EV fast-charging.
Published packages — 2026
Two SigenStor packages, priced by Athena
Sigenergy
16-panel system
All prices are subject to survey.
Sigenergy
10-panel system
All prices are subject to survey.
What the platform does
The whole system, in one tower
SigenStor stacks its batteries into a single floor-standing tower. Modules come in 6 kWh and 9 kWh sizes — start at the size tonight needs, and add modules later if an EV or a heat pump changes the maths.
The hybrid inverter is integrated into the same tower rather than mounted separately, so storage and control share one tidy footprint. An optional DC EV-charging module is available for the stack, for households planning to charge the car from stored sun.
Athena designs each SigenStor system around your usage and your roof — MCS-certified installations by a NAPIT-accredited team, with deposit protection and comprehensive warranties.
Design your system
The DC EV-charging module
Charge the car from stored sun
The optional DC EV-charging module slots into the same SigenStor stack as the battery modules and inverter — so a household planning an electric car can put stored solar energy into it, rather than drawing on the grid at evening rates.
And if an EV is on the horizon whichever platform you choose, EV charger installation is one of Athena’s core services in its own right — designed and fitted by the same accredited team, across Kent, Dover and beyond.
EV charger installationSigenStor or Fox ESS?
Which system suits you
This platform
SigenStor
Best for: whole-home backup, bigger roofs, and households that plan to add an EV.
Get your free quoteThe alternative
Fox ESS
Best for: tighter spaces, retrofits to existing panels, and value-focused installs.
Explore Fox ESS| Side by side | SigenStor | Fox ESS |
|---|---|---|
| Form factor | Floor-standing modular tower | Wall-mounted, stackable packs |
| Battery capacity | 6 kWh and 9 kWh modules — stack as you grow | Stackable packs, sized to your evenings |
| Inverter | Hybrid inverter built into the tower | Built to pair with hybrid inverters |
| EV charging | Optional DC fast-charge module for the stack | Separate EV charger installation available |
| Best for | Whole-home backup, bigger roofs, adding an EV | Tighter spaces, retrofits, value-focused installs |
| 10-panel package | £8,000 · 3.6 kW inverter · 6 kWh battery | £7,500 · 3.6 kW inverter · 5 kWh battery |
| 16-panel package | £11,000 · 6 kW inverter · 12 kWh battery | £9,500 · 6 kW inverter · 10 kWh battery |
All prices are subject to survey. Package prices are our published 2026 pricing.
Run your own numbers
What would a SigenStor package do to your bill?
The homepage has a savings calculator — pick SigenStor, slide in your monthly electricity bill and see an estimate of what solar and storage could save.
Keep exploring
Where the battery fits
Battery storage installation
Store more of the energy you already pay for — systems sized to your property, with monitoring apps and backup power during outages.
Battery storageFox ESS
Compact wall-mounted storage that pairs with hybrid inverters — stackable packs, retrofit-friendly.
Explore Fox ESSCompare the packages
All four published packages side by side — our prices, subject to survey.
All productsStart your design — tomorrow’s sun is free
Start your SigenStor design.
Tell us about your roof and your evenings — we’ll design a solar + storage system around them.