How much is
your diesel
costing you?
Construction sites running diesel generators overspend by 40–55% versus BESS battery systems. Use the slider to find out what you're wasting.
Not estimates.
Verified results.
Every figure below is from a live UK construction project with independently verified data.
Battery power.
Built for sites.
The Enertainer is a compact, connected Battery Energy Storage System (BESS) designed to transform energy use on construction sites. By significantly reducing or eliminating the need for diesel generators, it supports a cleaner, quieter, and more sustainable approach to temporary power.
Built for
construction.
Purpose-engineered for the demands of UK construction sites — not repurposed consumer tech.
Choose your capacity
From tower cranes to hoists and welfare — we size the system to your peak demand.
- Peak Current 475A
- Chemistry Li-ion NMC
- IP Rating IP55
- Weight 7.4t
- Dimensions 3.05 × 2.44 × 2.60m
- Input Supply 30A–90A
- Fire Suppression Aerosol
- Connectivity Cellular 4G
- Peak Current 521A
- Chemistry Li-ion LFP
- IP Rating IP45
- Weight 7.8t
- Dimensions 3.05 × 2.44 × 2.60m
- Input Supply 30A–90A
- Fire Suppression Aerosol
- Connectivity Cellular 4G
- Peak Current 730A
- Chemistry Li-ion LFP
- IP Rating IP45
- Weight 9.6t
- Dimensions 3.05 × 2.44 × 2.60m
- Input Supply 30A–90A
- Fire Suppression Aerosol
- Connectivity Cellular 4G
All models: Industrial HVAC thermal management (R134a) · Operating range -20°C to +45°C · Voltage 380–415VAC (3Ph + N + PE) · 50Hz
Safety & reliability
as standard.
Every Enertainer includes industrial-grade safety systems — no add-ons required.
Aerosol Fire Suppression
Integrated aerosol-type fire suppression system with automatic activation. Designed for thermal event protection in enclosed battery systems.
Industrial HVAC Cooling
Recirculating HVAC thermal management with R134a refrigerant. Operates reliably across -20°C to +45°C ambient temperatures.
IP55 / IP45 Enclosure
Dust-protected and water-resistant enclosure built for outdoor construction environments. Rain, dust, and site conditions won't slow you down.
24/7 Remote Monitoring
Cellular 4G connectivity via the Enernet platform. Real-time data transparency on operations, equipment status, and power usage — anytime, anywhere.
Power Outage Protection
Continues to operate during grid outages, providing uninterrupted power to your site equipment. No diesel backup required.
International Standards
Certified to UN38.3, IEC62619, IEC62109, EN62477-1, AS62040-1, and AS/NZS4777.2. EMC compliant to EN61000-6-2 and EN61000-6-4.
Smart software.
Real-time optimisation.
Every WOLFF BESS includes our energy management system — automatically optimising your power usage.
Peak Shaving
Reduce peak demand — apply for smaller grid connection (LV instead of HV).
Enernet Monitoring
Real-time data transparency on operations and equipment — anytime, anywhere.
Backup Power
Continues operating during power outages — keeping your site running.
Certified to
international standards.
Every Enertainer is built and tested to the highest safety and performance standards.
Every litre saved is
carbon avoided.
Switching to BESS doesn't just cut your fuel bill — it eliminates the majority of your site's direct carbon output.
The team behind
the technology.
From construction sites to major infrastructure projects — our BESS systems are backed by a specialist team with dedicated equipment, certified electricians, and the operational depth to keep your site running.
Dedicated Equipment
Our BESS fleet is purpose-built, maintained to the highest standard, and kept ready to deploy — not repurposed or shared with other operations.
Dedicated Electricians
Our certified, site-experienced electricians handle every installation and commissioning — giving you a single point of responsibility.
Sheffield & London
Two UK sites mean faster logistics, lower transport cost, and a local team that can respond quickly.
170+ Years of Expertise
Part of the Wolffkran Group since 1854 — over 170 years of construction equipment expertise.
Proven Track Record
Trusted by major UK contractors including Careys, VINCI, and McGoff Group.
Full-Service Support
From initial site survey through to installation, ongoing maintenance, and end-of-hire collection.
Stop the
diesel spend.
Start today.
Tell us your setup and we'll send a transparent cost comparison and quote within one working day.
We never share your details. You'll hear from us within one working day.
