Turn a spare plant room into an energy asset.
The Pramac BSI range is a pre-configured indoor battery storage kit. Bolt together racks, one inverter, one controller. 109 kWh to 872 kWh, supplied and supported in the UK by Generator Pro.
The Pramac BSI fits when:
Factories and warehouses have an underused plant room or spare bay
Commercial buildings are pairing storage with rooftop solar
Outdoor enclosures would trigger planning or aesthetic issues
The building is preparing to charge a fleet of vans or cars
Pramac BSI specifics, without the spec sheet
From survey to switched on in weeks, not quarters
Generator Pro surveys your space
Footprint, ventilation, floor loading, cable runs. One visit, one report.
Pramac delivers the kit pre-configured
Racks are craned or trolleyed in. Minimal site work. No welding, no bespoke panels.
Installation arranged to suit your site
Commissioned and tied into your existing solar, generator, EMS and metering, and handed over with training.
Where bill savings and grid income come from
A Pramac BESS on a UK commercial site has four routes to paying for itself. Most of them start the moment you switch it on, not after a payback period.
Cut peak demand charges
Most UK commercial tariffs charge a premium between 4pm and 7pm on winter weekdays. This is known as the DUoS red band. Discharging from the battery during those windows shifts your draw out of the high-rate band.
Capacity Market revenue
National Grid runs annual auctions (T-1 and T-4) paying assets to stay available for grid stress events. A qualified Pramac BESS earns a fixed monthly capacity payment for being on standby.
Get the right price for your PV
Without storage, exported solar pays a fraction of import price under SEG. With a battery on site, you keep that energy and discharge it through the evening shift.
Flexibility services
DNOs and the Balancing Mechanism increasingly pay site batteries for short-notice flexibility through schemes like DFS, Local Flexibility Markets and the BM. Income on top of bill savings.
Which mix applies to your site depends on your tariff, your existing solar, and whether you opt to enter the Capacity Market.
We work that out as part of the site survey before any commitment.
Proven kit, UK support
Pramac
Supplied battery storage across Europe for decades. LFP chemistry, 7,300 cycle life, fully certified to IEC 62619, UL 1973, UL 9540A and VDE 2510-50.
Generator Pro
Authorised Pramac dealer in the UK. Site surveys by our engineers, installation arranged to suit your site, and ongoing support via maintenance contract or adhoc service calls.
Warranty
5 years product, 10 years performance, included with every BSI system.
Pramac BSI in practice
An indoor Pramac system pairs naturally with an existing rooftop solar array. A typical Generator Pro scenario: a warehouse exporting half its midday solar at export rates, then buying it back an hour later at peak price, installs a BSI in an unused bay and shifts that energy to the evening shift where the grid unit cost is highest. The project pays for itself while giving the facilities manager a lever against every future tariff increase.
See if a Pramac BSI fits your building
Straight answers to the questions we get asked first
How long does installation take?
Most Pramac indoor and outdoor systems are commissioned within two to four weeks of delivery. Container systems are often faster because there’s less site work.
How much space do I need?
A Pramac indoor 109 kWh rack needs roughly a single phone box footprint. An outdoor cabinet sits on a pad about 1.3m by 1.4m. A 20ft container needs a concrete pad the length of a shipping container. We confirm exact dimensions during the site survey.
Will it work with my existing solar or backup generator?
Yes. Pramac kit ties into most solar inverters and generator controllers through standard Modbus TCP and REST interfaces, and the Pramac Smart Energy Controller coordinates everything automatically.
What happens if something fails?
You call Generator Pro. We can cover you via an ongoing maintenance contract or handle adhoc service calls as they come up. Pramac warranty covers product for a minimum of five years and battery performance for ten; the BSC MAX container range carries ten years on both.
