Commercial solar & energy infrastructure

Design the commercial energy system around the site — not the product catalogue.

Feasibility, system design, DNO coordination, installation and performance support for UK businesses.

START WITH SITE INTELLIGENCE

The fastest route to a useful commercial proposal is better input data.

Before array size or hardware, establish how the site uses energy, what the building can support and what the grid will allow.

01Energy profile

Half-hourly or interval data shows when electricity is used, not just how much. That changes self-consumption, battery value and the commercial model.

02Site + structure

Usable roof area, access, condition, structural constraints and operational restrictions determine what can actually be built.

03Grid + future load

Existing supply, generation, EV charging, batteries and planned expansion should be considered together before the equipment schedule is fixed.

CLIENT BENEFITA proposal based on the operation of the site rather than a generic kWp target.

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COMMERCIAL FEASIBILITY

Five engineering gates before a commercial system becomes an installable project.

The commercial proposal should move through these gates in sequence so roof space, load, grid and project economics stay connected.

DemandAnnual and interval load where available.

SiteRoof, structure, access and LV infrastructure.

GridG98 / G99 route and export conditions.

ModelGeneration, self-consumption and financial assumptions.

DeliveryProgramme, shutdowns, commissioning and handover.

Half-hourly dataUseful where available for commercial self-consumption modelling.

Export controlConsidered where DNO conditions or site strategy require it.

MonitoringSpecify what is measured, where it is measured and who can see it.

AssumptionsTariff, export and degradation inputs should be stated.

RELATED TECHNICAL GUIDANCE

Commercial solar ROI: assumptions behind payback →
G98, G99 and G100: connection routes explained →

FEASIBILITY INPUTS

Bring the site data before the equipment list.

A useful first-stage commercial assessment needs enough information to understand demand, electrical constraints and the delivery environment. Better inputs produce a more defensible design and financial model.

Energy dataRecent electricity bills and half-hourly consumption data where available.

Supply detailsMPAN, incoming supply information, main switch rating and known electrical constraints.

Site informationRoof or site plans, access restrictions, operating hours and any planned works.

Future demandFleet charging, electrified heating, production changes or expansion that could materially change the load profile.

DELIVERY RISK

The risks worth resolving before installation day.

Commercial projects become difficult when the electrical design, roof, grid route and site operations are treated as separate conversations. The proposal should surface these constraints early.

Constraint

Why it matters

What the design should address

Roof / structure

Array area and loading

Usable zones, obstructions, access, mounting approach and any structural information still required.

Grid / export

Connection route

DNO process, export assumptions and whether control or limitation needs to be designed in.

Operations

Keeping the site running

Access windows, shutdown requirements, delivery logistics and coordination around the business.

Controls

Systems interact

How solar, storage, EV charging, metering and monitoring behave together rather than as isolated products.

DECISION-READY PROPOSAL

Make the assumptions easy to audit.

A commercial proposal should separate measured inputs, design assumptions and projected outcomes so the business can challenge the model before approving the project.

Inputs

Demand data, tariffs, roof or site information and known electrical constraints.

Design

System size, layout, inverter or storage approach, grid route and integration requirements.

Economics

Generation assumptions, self-consumption, export value and the inputs used in the payback model.

COMMON QUESTIONS

Questions worth answering before the equipment is fixed.

Q01

What data makes a commercial solar assessment more useful?

Recent electricity bills, half-hourly consumption data where available, supply details, operating hours and known future loads give the design and financial model a stronger starting point.

Q02

Can a commercial system be sized from roof area alone?

Not responsibly. Roof area shows physical opportunity, but demand profile, export assumptions, electrical capacity, grid requirements and site operations can all change the sensible system size.

Q03

How should commercial payback be presented?

The model should separate measured inputs from assumptions and make tariff, self-consumption, export value, generation and finance assumptions visible so the result can be challenged.

VISUAL CONTEXT

Commercial energy design starts with the site and electrical infrastructure.

Commercial solar and energy infrastructure visual — Commercial solar feasibility begins with site demand and constraints.

Quantum Solar UK installation project photograph — Commercial installation planning includes access, cable routes and connections.

COMMERCIAL FEASIBILITY

Three decisions to settle before procurement.

Commercial solar and storage design should use real site constraints and explain the business assumptions behind the recommendation.

Site load

When does the business use power?

Meter data, opening hours, planned expansion and demand peaks inform PV, battery and EV charging options.

Site infrastructure

What can safely be installed?

Review roof or land suitability, electrical distribution, site access, shutdown constraints and DNO requirements.

Financial case

What drives the result?

Projected generation, self-consumption, tariff assumptions, export value and scope exclusions should be clear in any ROI model.

CONNECTED ENERGY SYSTEM

Move between the parts of the system without starting over.

Solar generation, storage, EV charging and grid constraints affect each other. Use these routes to keep the project connected.

01 / BUSINESSCommercial energyLoad, roof, grid and project economics → 02 / HOMEHome energySolar, battery and EV starting point → 03 / GENERATESolar PVRoof, yield and array design → 04 / STOREBattery storagekW, kWh and control logic → 05 / CHARGEEV chargingHome, workplace and managed load → 06 / CONNECTGrid / DNOG98, G99, G100 and export →

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