Monthly cost£0
Yearly cost£0
COMMERCIAL BATTERY ENERGY STORAGE
Commercial BESS and hybrid generator systems.
Containerised solar, battery and generator systems engineered to reduce diesel use, generator hours, noise and site emissions without compromising dependable power.
Potential fuel reduction depends on load profile, solar yield, system sizing, generator efficiency and site conditions.
Engineered and built in the UK
01
Capture
Solar energy supplies the load and charges the battery
02
Store
Battery capacity carries demand without idling a generator
03
Support
The generator starts automatically only when required
DIESEL SAVINGS CALCULATOR
Put your weekly diesel use into pounds.
See the indicative monthly and annual diesel cost of running a generator alone, then compare it with a correctly sized Callidus hybrid system.
litres / week
50 L5,000 L
Red diesel price£1.44 / litre
Potential diesel reduction94%
Illustrative estimate using the assumptions shown. A 94% reduction is achievable only under optimal conditions. Actual results depend on load profile, solar yield, generator efficiency, system sizing, fuel price and site conditions.
Indicative diesel saving per week
£0
0 fewer litres a year
Monthly diesel cost£0
Yearly diesel cost£0
Monthly saving£0
Yearly saving£0
CHOOSE YOUR CAPACITY
A field power unit sized around the load.
These three pre-selected systems provide convenient starting points. Callidus can also engineer a completely bespoke system around any required site specification.
Small system
Small Field Power Unit
A compact three-phase platform for smaller commercial loads, remote sites and projects moving away from continuous generator operation.
Solar array50 kW
Battery storage96 kWh
Maximum output36 kW
Medium system
Popular starting point
Medium Field Power Unit
The mid-range containerised platform for sites needing more usable energy and resilience, configured after a review of the real load profile.
Solar arraySite-matched
Battery storageSite-matched
AC architectureThree-phase
Large system
Large Field Power Unit
Higher-capacity three-phase power for demanding commercial, agricultural and construction loads where uptime and fuel reduction matter.
Solar array90 kW
Battery storage160 kWh
Maximum output108 kW
BESPOKE SYSTEMS
Any specification. Engineered around your site.
The small, medium and large systems above are pre-selected starting points, not fixed limits. Callidus also designs and builds bespoke containerised systems to virtually any power, battery, solar and generator specification required.
SAFETY & RELIABILITY AS STANDARD
Protection designed into the system.
The enclosure, battery environment, controls and remote visibility work together to protect the equipment and keep the site supplied.
Aerosol fire suppression
Integrated suppression provides a rapid response within the protected battery environment.
Industrial HVAC cooling
Controlled ventilation and cooling maintain a stable operating environment for the battery and power electronics.
IP-rated enclosure
A robust weather-resistant container protects critical equipment in demanding outdoor locations.
24/7 remote monitoring
Victron VRM provides live performance data, alarm visibility and remote diagnostic support.
Power outage protection
Stored energy and automatic generator support help maintain power when another source is unavailable.
Standards-led engineering
The complete system is designed, assembled, programmed and tested around the applicable site and equipment requirements.
INTELLIGENT ENERGY MANAGEMENT
Use stored energy before asking the generator.
The control strategy prioritises available solar and battery energy, starts the generator only when required and gives the Callidus team the visibility needed to support the installation.
Remote system visibility available
Peak shaving
Battery power supports short, high-demand events so the generator or grid connection does not need to be sized around every transient peak.
Victron VRM monitoring
See energy flows, battery state, solar yield and generator activity remotely, with historic data available for diagnosis and optimisation.
Automatic backup power
The system monitors battery state and demand, then brings in generator support automatically when energy or power thresholds require it.