UK Portable BESS Specialist
Portable BESS hire
without the diesel.
JAM Power supplies portable Battery Energy Storage Systems for construction sites, events, film & TV productions, telecoms infrastructure, and emergency services across the UK. Cleaner, quieter, and up to 70% cheaper to run than diesel generation alone.
Why choose JAM Power portable BESS
Renewable
LiFePO4 battery chemistry with zero direct emissions on discharge. Charge from solar, grid, or generator — JAM Power units integrate with any power source to cut your site’s carbon footprint.
Reliable
4,000+ charge cycles and a 15-year design life mean JAM Power units keep working as hard as your site does. Intelligent BMS protection prevents overcharge and thermal issues — guaranteed uptime, every deployment.
Responsible
UK designed, UK supported, with full lifecycle accountability. Every JAM Power hire includes 24/7 technical support, remote monitoring, and end-of-life battery recycling — no hidden costs.
The UK’s portable BESS hire specialist
From a single job site to a national event series — JAM Power delivers battery energy storage that outperforms diesel on every metric that matters.
Same-day mobilisation
With units ready across the UK, JAM Power can mobilise portable BESS to your site on the same or next working day. No long lead times. No missed project windows.
Scalable from 20 kWh to 500 kWh+
The JAM range covers everything from tight-access welfare units (JAM Lite) to bespoke multi-unit infrastructure deployments (JAM Max). Right-size power for every project.
Up to 70% lower fuel costs
Hybrid BESS arrangements typically cut diesel consumption by 50–70%. On projects lasting 8+ weeks, the fuel savings routinely exceed the additional hire cost.
24/7 UK technical support
Every JAM Power hire includes round-the-clock access to our UK-based technical team, remote unit monitoring, and proactive alerts — so any issue is resolved before it becomes a problem on site.
Portable battery storage units for hire & sale
Three units. One consistent standard of quality. Choose the JAM model that fits your site — or combine units for larger demands.
Compact BESS for tight-access sites
The JAM Lite is designed for welfare cabins, tight-access construction plots, and single-phase event rigs where space is limited but reliable silent power is non-negotiable.
- 20–50 kWh LiFePO4 capacity
- Single-phase output
- Fork-pocket base — no crane needed
- Silent on discharge
- Remote monitoring included
The flagship portable BESS hire unit
100–250 kWh capacity makes the JAM Pro the workhorse of choice for construction sites, festival power rigs, and film & TV locations. Hybrid or standalone operation.
- 100–250 kWh LiFePO4 capacity
- Three-phase 230/400V output
- Generator hybrid or standalone
- 4G remote monitoring
- 24/7 UK support included
Bespoke BESS infrastructure from 500 kWh
For large-scale infrastructure, telecoms, and emergency service deployments requiring permanent or semi-permanent battery energy storage. Designed with a dedicated JAM project engineer.
- 500 kWh+ modular capacity
- Bespoke engineering design
- Grid, solar or genset input
- SCADA / full telemetry
- Dedicated project engineer
JAM Power performance and trust signals
How portable BESS hire works
From first enquiry to live deployment — most sites are powered inside 48 hours.
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Tell us about your power need
Share your load requirements, site location, and project duration. Our team will specify the right JAM unit — or a combination — and provide a clear, no-obligation quote within hours.
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We deliver and commission on site
JAM Power handles delivery, placement, and commissioning. Our engineers set up the hybrid arrangement with your existing generator or grid connection, and brief your team before they leave.
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Silent, clean power — continuously monitored
Your JAM unit runs automatically, switching intelligently between charge and discharge. Our UK team monitors performance remotely 24/7, and is on call if anything needs attention.
Battery storage knowledge hub
BESS vs diesel generators on construction sites: a full cost comparison
How portable battery storage stacks up against traditional diesel generation across fuel, maintenance, compliance and carbon costs — with worked examples.
Read article →Silent power for events: why BESS is replacing generators at UK festivals
From noise ordinance pressure to sustainability pledges — the operational and commercial case for battery storage at outdoor events and festivals.
Read article →What is LiFePO4? Why JAM Power uses lithium iron phosphate chemistry
LiFePO4 is the safest, longest-lived lithium chemistry available. Here’s why it’s the only chemistry in the JAM Power range — and why it matters for your site.
Read article →Portable BESS hire — frequently asked questions
What is a portable Battery Energy Storage System (BESS)?
A portable BESS is a self-contained unit that stores electrical energy in lithium iron phosphate (LiFePO4) cells and releases it on demand. JAM Power units can be charged from the grid, solar, or a generator, then deployed anywhere on site to deliver clean, silent power — eliminating or dramatically reducing diesel generator runtime.
How much can I save by replacing a diesel generator with a BESS?
JAM Power customers typically save up to 70% on fuel costs when switching from diesel-only generation to a hybrid BESS arrangement. Exact savings depend on load profile and site duration, but most projects lasting 8+ weeks achieve net savings over equivalent diesel hire. Use our cost savings calculator for a site-specific estimate.
Is portable BESS hire available across the UK?
Yes. JAM Power operates across the whole of the United Kingdom, with units available for same-day or next-day mobilisation to most locations. Our team handles delivery, commissioning, and collection — you focus on the project.
Do JAM Power units operate silently?
Yes. JAM Power battery storage units produce 0dB of operational noise — unlike diesel generators. This makes them ideal for residential construction sites, night shoots, noise-sensitive events, and any deployment with noise ordinance restrictions.
What size BESS do I need for my site?
JAM Power units range from 20 kWh (JAM Lite) to 500 kWh+ (JAM Max). The right size depends on your peak load (kW) and how long you need to run without a recharge (kWh). Our team will spec the correct unit from your load data — get in touch and we’ll turn a quote around the same day.
Ready to cut diesel out of your site?
Get a same-day quote for portable BESS hire across the UK. No commitment. Just honest advice on the right unit for your project.