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01709 437141
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Site Power Calculator

Calculate your diesel savings in under 60 seconds

Verified data from Careys, VINCI, McGoff, GMI & Torsion projects
Careys Civil Engineering
£192K saved
"£3,715/week in diesel savings alone."
Read more →
VINCI Building
276T CO₂ avoided
"Extended hours, zero noise complaints."
Read more →
McGoff Construction
Diesel eliminated
"Zero diesel on site from day one."
Read more →
GMI Construction
850 kVA silent
"Neighbours thanked us for the quiet."
Read more →
Configuration
📊

Careys saved £192K over 2 years

"£3,715/week in diesel savings alone." Read the full case study →
months
hrs
Grid Connection?
Grid charging: zero fuel costs. Grid connection cost not included.
These are estimates for illustrative purposes. Every project is different. Contact us for an accurate quotation.
Your Potential Savings
£284,128
51% cost reduction over 24 months — £2,732/week
⛽
Diesel Generator
£554,840
Hire + Fuel for 24 months
🔋
BESS Solution
£270,712
BESS + reduced generator
Total Project Cost
Diesel Only £554,840
With BESS £270,712
50%
Less Runtime
87%
Fuel Saved

Environmental Impact

Estimated reductions by switching from diesel generators to BESS over the project duration

⛽ 159,120 Diesel Litres Avoided
🌍 420 Tonnes CO₂ Avoided
🌳 20,000 Equiv. Trees to Offset (1yr)
🚗 91 Equiv. Cars Off Road (1yr)
Sustainability Reporting
87%
Fuel Reduction
420T
Scope 1 CO₂e Avoided
✓
BREEAM Contribution*
*Supports Pol 04 (NOx reduction), Ene 01 (energy efficiency), and Man 03 (responsible construction) credits.
Crane Configuration
🏗️

VINCI avoided 276T CO₂

"Silent crane operation, extended working hours with no complaints." Read case study →
months
Grid Connection?
Grid charging: zero fuel costs. Grid connection cost not included.
Welfare Cabins
Office / Meeting Rooms
Drying Rooms
Canteen
Toilets
3-Phase Kitchen
Gatehouse / Security
Turnstiles / Access
Generator Required 300 kVA
Est. Daily Demand 220 kWh
Estimates for illustrative purposes. Contact us for an accurate quotation.
Your Potential Savings
£196,000
45% cost reduction over 18 months — £2,513/week
⛽
Diesel Only
£432,000
Traditional generators
🔋
With BESS
£236,000
Battery + backup gen
Total Project Cost
Diesel Generators £432,000
BESS Solution £236,000
50%
Noise Reduction
50%
Less Emissions

Environmental Impact

Estimated reductions by switching from diesel generators to BESS over the project duration

✈️165Equiv. Flights LDN-NY
🚗110Equiv. Cars Off Road (1yr)
🌳7,857Equiv. Trees to Offset (1yr)
🏠75Equiv. Homes Powered (1yr)
Sustainability Reporting
87%
Fuel Reduction
165T
Scope 1 CO₂e Avoided
✓
BREEAM Contribution*
*Silent crane operation supports good neighbour relations and extended working hours.
Industrial Configuration
Quick Presets
Motors / Drives
kW ea
Conveyors
kW ea
Crushers
kW ea
Compressors
kW ea
Batch Plant
kW ea
Site Offices
kW ea
Lighting
kW ea
months
hrs
Grid Connection?
Grid charging: zero fuel costs. Grid connection cost not included.
Generator Required 0 kVA
Est. Daily Demand 0 kWh / 0A
Estimates for illustrative purposes. Contact us for an accurate quotation.
Your Potential Savings
£0
0% cost reduction over 12 months — £0/week
⛽
Diesel Generator
£0
Hire + fuel
🔋
BESS Solution
£0
BESS + reduced generator
Total Project Cost
Diesel Only£0
With BESS£0
50%
Noise Reduction
0%
Fuel Saved

Environmental Impact

Estimated reductions by switching from diesel generators to BESS over the project duration

⛽0Diesel Litres Avoided
🌍0Tonnes CO₂ Avoided
🌳0Equiv. Trees to Offset (1yr)
🚗0Equiv. Cars Off Road (1yr)
Sustainability Reporting
0%
Fuel Reduction
0T
Scope 1 CO₂e Avoided
✓
ESG / Net Zero Contribution*
*Supports carbon reduction targets, ESG reporting requirements, and BREEAM credits where applicable.
Custom Site Configuration

Add your equipment below. Works for events, rail, film production, agriculture, or any temporary power application.

EquipmentkWQty
months
hrs
Grid Connection?
Grid charging: zero fuel costs. Grid connection cost not included.
Generator Required 0 kVA
Est. Daily Demand 0 kWh / 0A
Estimates for illustrative purposes. Contact us for an accurate quotation.
Your Potential Savings
£0
0% cost reduction over 12 months — £0/week
⛽
Diesel Generator
£0
Hire + fuel
🔋
BESS Solution
£0
BESS + reduced generator
Total Project Cost
Diesel Only£0
With BESS£0
50%
Noise Reduction
0%
Fuel Saved

Environmental Impact

Estimated reductions by switching from diesel generators to BESS over the project duration

⛽0Diesel Litres Avoided
🌍0Tonnes CO₂ Avoided
🌳0Equiv. Trees to Offset (1yr)
🚗0Equiv. Cars Off Road (1yr)
Sustainability Reporting
0%
Fuel Reduction
0T
Scope 1 CO₂e Avoided
✓
ESG / Net Zero Contribution*
*Supports carbon reduction targets, ESG reporting requirements, and BREEAM credits where applicable.

Get Your Custom Report

See how WOLFF Onsite can help you save with BESS hire or purchase. Download a detailed cost comparison tailored to your site.

Your PDF downloads instantly. We may contact you to discuss your requirements.
Generator Data: Fuel consumption based on manufacturer data at 50% capacity. Stage 3a and Stage 5 emission compliant generators. Diesel prices: Stage 3 £1.40/L inc AdBlue, Stage 5 £1.99/L inc AdBlue.

BESS Performance: BESS units sized by both energy capacity (kWh/day) and power output (continuous amps). Larger units are automatically recommended when site demand exceeds standard capacity. Charged by a 100 kVA generator running 30 hrs/week at 75% load per unit. Grid-connected mode charges from mains electricity. Sizing applies a 0.8 simultaneity factor on running amps.

Crane Power: Based on Wolffkran electrical connection data. Min. required generator power from manufacturer specs. Includes luffing jib (B series) and trolley cranes.

CO₂ Factor: 2.64 kg/litre (DEFRA/DESNZ 2024/25).
Methodology & Sources: Estimates based on case study data from Careys, VINCI Building, McGoff Construction, GMI Construction & Torsion. CO₂ factor: 2.64 kg/litre (DEFRA/DESNZ 2024/25).

Important: Every project is different. These figures are estimates for illustrative purposes only. For an accurate assessment, please contact WOLFF Onsite for a detailed quotation.
Savings £284,128
Get Your Report →
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01709 437141

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Mon–Fri: 8:30am – 5:00pm

Part of WOLFFKRAN, trusted since 1854

Delivery Information

From our depot to your site, every order is fully tracked and delivered on our own WOLFF Onsite vehicles or via trusted courier partners. Delivery costs are calculated based on your postcode and order size.

Pallet Delivery
Dispatched within 1–2 working days, delivered next working day between 8am–5pm, Monday to Friday. Delivery cost is based on the number of pallet spaces and your delivery zone.

Parcel Delivery
Smaller items like radio accessories and safety equipment ship via tracked courier at a flat rate. Deliveries between 8:30am–5pm, Monday to Friday.

RENTAL Delivery / Collection
All rentals are delivered and collected by the WOLFF Onsite team. We'll confirm a delivery time that works for you and arrange collection within 3 working days of your hire end date. Deliveries and collections between 8am–5pm, Monday to Friday, Saturday collections can be arranged if suitable.

Dispatch Times
Orders placed by 1pm are dispatched same day where possible. Some products carry a manufacturing lead time, this is always stated in the product description.

Need Help?
Call us: 01709 437 141
Email: hello@wolffonsite.co.uk Available 8:30am - 5pm Mon-Fri

We are happy to help with any delivery or product questions.

Part of WOLFFKRAN, trusted since 1854