Commercial Battery Storage
Storage, properly sized and delivered
You've decided storage makes sense for your site. The challenge is ensuring it's sized to your actual load profile, safely specified, compliant with grid and fire regulations, and delivered without becoming a project you have to manage yourself.
Pretium Synergy takes an owner's-engineer approach: we assess your demand, design the right system, and deliver it under one fixed-price scope as your single accountable partner.
Use cases
Why businesses install storage — and which reason is yours
Storage earns its keep in different ways depending on what's actually driving the decision. Most sites have one primary reason, occasionally two. We size the system around whichever of these actually applies to you.
01
Cutting demand charges
Many commercial tariffs charge separately for your peak demand, not just total energy used—sometimes based on a single highest half-hour in the billing period. If this is a significant line on your bill, a battery sized to shave that peak can be the single biggest lever available.
Typical for: Warehouses, manufacturing, and any site with high, spiky demand.
02
Shifting load to cheaper rates
Charging on off-peak or self-generated power and discharging when electricity is expensive. This is straightforward cost management that works off tariff structure alone, with or without solar.
Typical for: Any site on (or able to move to) a time-of-use tariff.
03
Keeping critical operations running
Backup through a grid outage for operations where downtime is a genuine cost, not an inconvenience. This changes the design—it needs backup-capable hardware and circuit selection, not just a storage-only system.
Typical for: Healthcare, cold chain/food storage, and data-dependent operations.
04
Working around grid constraints
Where a site wants to add load (EV fleet charging, electrified heating, expansion) but the existing connection can't support it. A battery can smooth demand so the site operates within its current capacity, avoiding slow or costly DNO upgrades.
Typical for: Growing sites, fleet operators, and anyone electrifying other parts of the operation.
Some sites also generate revenue from grid services (demand flexibility, balancing markets). This is genuinely valuable where the system supports it, but usually a secondary benefit layered onto a system already justified by one of the four drivers above.
A warehouse chasing demand charges and a data centre needing backup are solving different problems, even though both are “battery storage.”
The challenge
Why this needs rigour, not just a quote
Commercial battery storage fails on the details that a quick quote skips over:
- Whether the system is sized to your actual demand pattern rather than a round number.
- Whether the fire and safety case has been properly engineered for a battery system specifically.
- Whether DNO approval and import/export limits are secured before you commit capital.
- Whether the commercial case (peak avoidance, demand charges, backup) is based on your real data, not generic savings claims.
Pretium Synergy manages these complexities so you don't have to become an energy trader, a fire safety engineer, and a project manager just to get storage installed properly.
How we work
Assess → Design → Deliver → Support
We follow a disciplined four-stage process to ensure certainty at every step.
01
Assess
We analyse your half-hourly load profile, tariff structure, demand charges, and specific objectives (cost reduction, resilience, or both). We do not size a battery to fit a budget; we size it to fit your need.
02
Design & approve
We create a site-specific design covering chemistry, capacity, power rating, enclosure, and protection. We handle the structural and fire safety case, and the DNO application, as part of the core scope—not as surprises discovered mid-project.
03
Deliver
Installation is executed under one fixed-price contract. We manage our own team and vetted subcontractors—you deal with one company throughout.
04
Support
We handle commissioning, certification, monitoring setup, and provide an agreed support period beyond switch-on.
Business case
Sized to your load, not a round number
Once we know which driver matters most, sizing is about matching capacity and power rating to how you actually use and pay for electricity.
- Too small: You miss the peaks that matter.
- Too large: You tie up capital that never earns its return.
Our business case works from your actual half-hourly demand data, modelling realistic payback against the specific driver identified above.
Where more than one configuration is viable (e.g. capacity vs. power rating, standalone vs. paired with solar), we don't hand you a spec sheet and leave you to decide. We tell you which option we would choose, and why.
Grid connection
Solved before it becomes a problem
A commercial battery interacts with the grid on both charge and discharge. DNO approval must account for this bidirectional flow, and this is where projects most often stall.
We handle the entire process:
- Managing the G98/G99 application route for storage.
- Calculating and managing import and export limitations.
- Flagging required grid reinforcement early—before procurement, not after.
If reinforcement falls outside the agreed scope, it is identified transparently and agreed through a clear change process. You will never face a surprise invoice for grid works discovered post-installation.
We address the grid connection before the installation becomes a problem.
Safety
Engineered in
Battery energy storage carries risks genuinely different from solar or standard electrical work. These must be resolved at the design stage, not fixed after the fact. We specify to recognised UK fire safety guidance for battery storage.
Our safety protocol includes:
- Chemistry selection: Choosing the right cell chemistry for your risk profile and application.
- Thermal management: Ensuring correct spacing, ventilation, and cooling systems.
- Fire detection & suppression: Designing active and passive systems specific to battery enclosures.
- Siting: Calculating safe setbacks from buildings and boundaries.
- Commissioning: Full testing and provision of emergency response documentation.
This is design discipline specific to storage, not a generic electrical checklist applied to a different technology.
Commercial terms
One fixed price, one contract
Our fixed price covers design, structural and fire safety case, DNO fees, equipment, installation, commissioning, certification, and an agreed initial support period.
- One scope.
- One contract.
- No separate suppliers to manage.
Unforeseen site conditions (e.g. enclosure groundworks, structural strengthening, or DNO-mandated reinforcement) are identified early and agreed separately before work proceeds. This ensures our fixed price remains meaningful and accurate.
You define the outcome. We take responsibility for delivering it.
Ongoing relationship
Beyond switch-on
The relationship doesn't end at commissioning. We stay involved to protect your investment:
- Remote performance monitoring.
- Annual inspection coordination.
- Warranty and defect resolution.
- Planning future phases (solar, EV charging, heat pumps) as your needs grow.
Other commercial pathways
Solar PV
Assess, design and deliver commercial solar under one fixed-price scope.
View Solar PV →EV ChargePoint
Workplace and depot charging — go to the eMobility hub.
View EV ChargePoint →Air source heat pumps
Commercial air source heat pumps assessed, designed, and delivered through one accountable fixed-price scope.
View Heat pumps →Air conditioning
Zoned Air-to-Air (VRF/VRV) comfort cooling and heating — assessed, designed, and delivered through one accountable fixed-price scope.
View Air conditioning →Energy Transition Planning
Business case, technology pathway and fixed-price delivery.
View Energy Transition Planning →
Ready to install storage properly?
Tell us about your site, your load profile, and what you want storage to achieve. We'll assess the opportunity and deliver the agreed project as one accountable, fixed-price relationship.
Storage, safely assessed and properly delivered.