Voltage Optimisation
Voltage optimisation reduces the electricity your business consumes by correcting the incoming supply voltage to the optimal level, typically delivering 8–12% savings on your energy bills from day one, with no disruption to your operations.
Installation is usually completed in a single day. No downtime. No changes to how you work.
What’s included?
Full site survey and voltage assessment prior to installation
Supply and installation of a bespoke voltage optimisation unit
Integration with your existing electrical infrastructure
Post-installation monitoring to verify energy savings
Voltage optimisation works alongside solar and battery storage — or completely standalone. Most systems pay back within two years.
Why voltage optimisation
8–12%
Typical Energy Bill Reduction
1 Day
Typical Installation Time
2 years
Typical Payback Period
20-30 years
System Lifespan
How it works
The UK grid supplies electricity at up to 253V, but most commercial equipment is designed to run efficiently at around 220V. That gap — up to 33 volts — is wasted energy your business is paying for every single day.
A voltage optimisation unit is installed at your incoming electrical supply. It continuously regulates the voltage delivered to your premises, bringing it down to the optimal level for your equipment. The result is immediate, automatic energy savings — with no changes to how your business operates.
01
Site Assessment
We carry out a full voltage survey of your premises to confirm the level of saving your site can achieve before any work begins.
02
Installation
Our accredited engineers install the voltage optimisation unit at your incoming supply. Most commercial installations are completed in a single day with no disruption to operations.
03
Monitoring & Verification
Post-installation monitoring confirms your actual energy savings. We provide a report showing the reduction in consumption so you can see the return on your investment clearly.
A straightforward investment with a fast return
Unlike solar, voltage optimisation requires no planning permission, no roof surveys, and no grid connection applications. It is one of the simplest and most reliable energy-saving measures a commercial business can make.
Most commercial sites achieve full payback within 18 months to 2 years, after which the system continues delivering savings for 15–20 years with minimal maintenance. The system also qualifies for capital allowances, reducing the effective cost further for limited companies.
We provide a detailed ROI projection as part of your free site assessment — so you know exactly what to expect before committing to anything.
"Olympus contracted with Electrasure for a rollout of voltage optimisation equipment. The team are professional, responsive and easy to work with. Technical knowledge and communication has been excellent."
Vanessa Zalman / Simon Nicholls
General Manager / CEO, Olympus PowerFAQs
What is voltage optimisation and how does it work?*
1
The UK grid supplies electricity at up to 253V, but most commercial equipment is designed to operate efficiently at around 220V. That gap is wasted energy your business pays for every day. A voltage optimisation unit is installed at your incoming electrical supply and continuously regulates the voltage delivered to your premises, bringing it down to the optimal level for your equipment. The result is immediate, automatic energy savings with no changes to how your business operates.
How much could voltage optimisation save my business?
2
Most commercial sites see an immediate reduction of 8–12% on their electricity consumption. The exact saving depends on your current incoming supply voltage and the types of equipment running on your premises. Businesses running energy-intensive equipment — motors, compressors, refrigeration, lighting, and HVAC systems — typically see the greatest savings. We carry out a full voltage assessment before installation so you know the projected saving upfront.
How long does installation take?
3
In most cases, voltage optimisation installation is completed within a single working day. There is no disruption to your operations — the unit is installed at your incoming supply and the switchover is managed to minimise any downtime. Most businesses experience no interruption to their normal working day during installation.
Does voltage optimisation affect the performance of my equipment?
4
No — voltage optimisation improves equipment performance rather than compromising it. Running equipment at the correct voltage reduces heat generation, extends component lifespan, and lowers maintenance costs over time. Your equipment will operate exactly as intended, just more efficiently.
Does voltage optimisation work alongside solar panels?
5
Yes — voltage optimisation and solar PV are highly complementary. Solar reduces the amount of electricity you draw from the grid, while voltage optimisation ensures that the electricity you do use — whether from solar or the grid — is consumed as efficiently as possible. Installing both together maximises your overall energy cost reduction.
Is voltage optimisation suitable for my type of business?
6
Voltage optimisation is most effective for businesses with high energy consumption and equipment that runs continuously — manufacturing facilities, warehouses, retail locations, food production, hotels, and care homes are among the strongest candidates. We carry out a free site assessment to confirm suitability before recommending installation.
Do I need planning permission for voltage optimisation?
7
No — voltage optimisation units are installed internally at your incoming electrical supply and do not require planning permission. The installation is handled entirely by our accredited engineers and all work is fully certified on completion.
How long does a voltage optimisation unit last?
8
Most commercial voltage optimisation units have a lifespan of 15–20 years with minimal maintenance required. We provide post-installation monitoring to verify your energy savings and offer ongoing maintenance contracts if required. The unit works silently and automatically in the background once installed.
Ready to get started?
Book a free, no-obligation consultation with our team. We'll assess your business, explain your options clearly, and give you an honest view of what solar or energy optimisation could save you.
