Sectors
Eight sectors. Onesizing engine.
Construction is where Sizr was built, and it is still where most of the work is. These are the other UK sectors that live on temporary power, and what changes about the sizing when you walk onto each one.
Construction
Most UK sites run on temporary power for months before a permanent supply is energised. Welfare cabins, tower cranes, hoists, task lighting and 110V tools all sit behind the same set, and they rarely peak politely one at a time.
Load personality
- /The 7am welfare surge as heaters, kettles and dryers land together
- /Crane and hoist starting current, not just running current
- /Overnight standby that keeps a set idling at low load
- /Load that grows through the programme as trades arrive
Typical Sizr output
- /Stage V generator sized on peak, not average
- /Hybrid battery to carry nights and shave the morning peak
- /Powerlock or lug tails to the main distribution unit
- /Splitter boxes, 63A and 32A distribution, 110V transformers
Sizing on the sum of nameplate ratings buys a set that spends its life at 20 percent load, burning fuel and glazing bores. Sizr applies diversity and duty cycles instead.
Rail, highways and civils
Linear projects move. A rail possession, a highways contraflow or a bridge replacement puts a working compound somewhere with no supply at all, often for a single weekend, then does it again three miles down the track.
Load personality
- /Short, intense possession windows with a hard handback time
- /Lighting towers, welfare and signalling test gear on one compound
- /Split compounds along a route rather than one central load
- /Noise limits where works sit against housing
Typical Sizr output
- /Compact towable sets that fit the compound and the access
- /Battery led supply for quiet running through the night
- /Long cable runs with voltage drop accounted for
- /Duplicate distribution so a swap does not stop the works
Because possessions are priced by the hour, an undersized set is not an inconvenience, it is a missed handback. Sizr shows the headroom it has left you and why.
Events and festivals
Event power is the most peaked load in the country. A field is empty on Wednesday, drawing hundreds of kVA across stages, traders, bars and broadcast by Friday night, then quiet again by Monday morning.
Load personality
- /Show peaks against a very low overnight base load
- /Trader villages with heavy catering and refrigeration demand
- /Sound and lighting that will not tolerate voltage dips
- /Redundancy expectations for anything life safety related
Typical Sizr output
- /N plus one arrangements for critical stages
- /Battery storage to hold the overnight base load with sets off
- /Ring or radial distribution across the site with cable schedules
- /Metered distribution for trader recharging
The overnight base load is where events waste the most fuel. Model it properly and a battery removes the need to idle a large set all night.
Data centres and critical load
Data centre programmes need temporary power at both ends: to build and commission the hall, and to bridge cooling, controls and critical load during upgrades or a delayed grid connection.
Load personality
- /Load bank testing to prove capacity before handover
- /Cooling and controls that cannot see an interruption
- /Step loads during commissioning and witness testing
- /Long duration running with tight fuel management
Typical Sizr output
- /Sets sized with margin for step load and harmonic content
- /Load banks matched to the test regime
- /Bulk fuel with monitored autonomy
- /Fully documented distribution and changeover arrangements
This sector buys certainty rather than kilovolt amperes. Sizr prints every assumption so the temporary arrangement can be reviewed and signed off.
Utilities and grid works
Water, wastewater, gas and electricity networks run temporary power whenever an asset is taken out of service. Pumps, blowers, dosing and telemetry still have to run while the substation or the pumping station is rebuilt.
Load personality
- /Motor starting on pumps and blowers, repeatedly
- /Continuous duty across an outage window measured in weeks
- /Telemetry and control loads that must stay live
- /Sites with difficult access and limited standing area
Typical Sizr output
- /Sets sized on starting current with soft start where fitted
- /Bunded fuel storage for extended autonomy
- /Automatic changeover between prime and standby
- /Cable and distribution to scattered assets on one site
Continuous duty at part load is where fuel spend hides. A 24 hour model, rather than a working day model, is the only honest way to price it.
Industrial shutdowns
Manufacturing turnarounds compress a year of maintenance into a fortnight. Temporary supplies keep welding, lifting, testing and site lighting running while the plant supply is isolated.
Load personality
- /Welding and test loads with poor power factor
- /Round the clock working across shift patterns
- /Hot work and lifting concentrated into short windows
- /Areas isolated one by one rather than all at once
Typical Sizr output
- /Sets sized for welding duty and power factor
- /Temporary distribution zoned by work area
- /Task lighting and welfare on separate circuits
- /Standby capacity for the loads that cannot stop
Shutdown power is planned weeks ahead and changed days ahead. Being able to resize in minutes is worth more here than anywhere else.
Film, TV and broadcast
Location work carries lighting, camera, hair and makeup, production offices and honey wagons into places with no supply, and the whole lot has to be inaudible on a boom mic.
Load personality
- /Lighting rigs with high inrush on strike and restrike
- /Sensitive camera and audio equipment needing clean supply
- /Unit base loads running long after the shoot day ends
- /Strict noise limits, often in residential streets
Typical Sizr output
- /Super silenced sets and battery units for takes
- /Battery led supply so sets can be shut down while rolling
- /Distribution to unit base, lighting and technical separately
- /Cable runs planned around public access
Noise is the design constraint here, not capacity. Sizr models quiet hours against the real load so the battery is sized for the takes, not for a spreadsheet.
Modular and healthcare
Modular buildings arrive complete and are occupied immediately. Heating, ventilation, IT and medical equipment all come on load together, often well before a permanent connection is available.
Load personality
- /HVAC duty cycles across a full occupied day
- /IT, comms and access control that must not drop
- /Clinical equipment with its own continuity requirements
- /Long hire durations measured in months or years
Typical Sizr output
- /Sets sized for continuous occupied duty
- /Battery storage for overnight and resilience
- /Distribution matched to the building connection points
- /Fuel and service planning across a long hire
Long hires reward accuracy. A single tier of oversizing carried for a year costs more than the whole sizing exercise ever will.
Not on the list
If it runs on agenerator, we size it.
Ports, agriculture, emergency response and defence all follow the same logic: a load with a shape, a duration and a noise limit. Tell us the profile you work with.