Net Zero for Business: A Practical Roadmap to Cutting Scope 1 and 2

What net zero for business actually means

Net zero for business means cutting your operational carbon as far as you genuinely can, then dealing with the small remainder honestly rather than papering over the whole figure with offsets. For most UK companies that carbon splits into three scopes: Scope 1 is what you burn directly, mainly gas boilers and fleet fuel; Scope 2 is the electricity you buy; and Scope 3 is your wider supply chain. This guide deals with Scope 1 and 2, because those are the emissions you control on your own site and the ones your customers, investors and lenders ask about first.

The good news is that the technologies that cut those emissions also cut cost. UK commercial electricity now runs at roughly 25 to 45p per kWh, close to double 2021 levels, so every unit you avoid or self-generate protects margin. The mistake most businesses make is treating net zero as a single purchase, usually solar, sold by whichever company called last. A credible plan is a sequence, not a product, and the order matters more than any individual piece of kit.

The order that works: measure, generate, store, electrify, fund

The sequence below maximises return because each step is cheaper per tonne of carbon than the last, and each one right-sizes the step that follows. Doing it in this order is the single biggest reason some renewable projects pay back years faster than others.

Step	Measures	Typical payback	Scope cut
1. Measure and reduce	Energy audit, voltage optimisation, LED, HVAC controls	1-4 years	Scope 2
2. Generate	On-site solar PV sized to your reduced load	5-8 years	Scope 2
3. Store and shift	Battery storage, smart EV load balancing	5-9 years	Scope 2
4. Electrify	Heat pumps (gas), EV charging (fleet fuel)	3-12 years	Scope 1
5. Fund and procure	AIA/Full Expensing, grants, or a zero-capex PPA	n/a	enables all

Step 1: Measure and reduce first

The cheapest kWh is the one you never use. An energy audit plus voltage optimisation, LED lighting and better controls typically strips 8 to 25% off consumption at a one to four year payback. It also means any solar, battery or heat pump you install afterwards is sized to a lower, well-managed demand rather than paying to generate power you were wasting. If your business is a large undertaking, an ESOS-grade audit is already mandatory every four years, so you may as well make it useful. Start here even if solar is the project the board is excited about.

Step 2: Generate clean power on site

For most UK businesses, commercial solar PV is the largest single lever on Scope 2. A large unshaded warehouse, factory or office roof aligns generation with the working day, so 55 to 85% is used on site rather than exported. Sized properly from your half-hourly meter data, not your roof area, a commercial array pays back in five to eight years and then delivers 15 to 20 years of near-free power under a 25-year warranty. One kWp needs roughly five to six square metres and yields around 900 to 1,000 kWh a year in the UK, even in the diffuse light we actually get. Surplus you cannot use earns income through the Smart Export Guarantee.

Step 3: Store and shift

Solar generates through the day; many businesses need power into the evening or overnight. Battery storage lifts self-consumption from around 55 to 75% up to 80 to 95%, shifts grid import onto cheap overnight tariffs, and shaves expensive peak demand charges. Add it once you have a year of solar data so it is sized to the load it actually displaces. Most PV systems are designed battery-ready, so storage can follow later without rework.

Step 4: Electrify heat and transport

This is where you attack Scope 1, the emissions solar alone cannot touch. Commercial heat pumps replace gas and oil boilers, delivering three to four kWh of heat for every kWh of electricity (a COP of 3 to 4), and they are strongest run on your own solar. Size them alongside a fabric and controls upgrade so you are not heating a leaky building. For transport, workplace and fleet EV charging removes fleet-fuel emissions, and charging on self-generated solar at a few pence per kWh transforms the economics against forecourt fuel or grid power at 25 to 45p. Designed together, solar, battery, heat pump and EV charging behave as one system with load management, not four separate installs.

Step 5: Fund and procure

You rarely need to fund all of this from cash. 100% Annual Investment Allowance and Full Expensing let a profitable company deduct the full cost of solar, batteries, heat pumps and EV chargers from taxable profit, recovering roughly a quarter through tax, with VAT separately reclaimable. Grants stack on top: the Workplace Charging Scheme gives £350 per EV socket up to 40 sockets, the Industrial Energy Transformation Fund suits energy-intensive manufacturers, and the Public Sector Decarbonisation Scheme funds public buildings. Where capex is the blocker, an on-site Power Purchase Agreement installs generation at zero capex: a funder owns the kit and you buy the power below grid price. The full list sits on our grants and funding page.

How this actually cuts Scope 1 and Scope 2

It helps to be precise about which measure moves which number, because that is exactly what a SECR or CDP disclosure and a customer questionnaire will ask.

• Scope 2 (bought electricity): efficiency and on-site solar cut it directly and immediately. A battery reduces it further by displacing peak grid import. These are the fastest, cheapest carbon wins.
• Scope 1 (gas and fleet fuel): only electrifying heat and transport removes these. A heat pump takes gas off your Scope 1 line; EV charging takes fleet diesel and petrol off it. A green electricity tariff never touches Scope 1, which is why so many companies stall at a plateau they cannot explain.

One honest caveat on reporting: a REGO-backed green tariff is widely seen as a weak claim because it does not add new generation to the grid. On-site generation and a genuinely additional PPA are auditable, defensible claims for your disclosures and tender responses. If a measure cannot be verified, it does not belong in your net zero figure.

A representative sequence in numbers

To make the roadmap concrete, here is a modelled example rather than a specific client. A mid-sized distribution site near Birmingham running roughly £110,000 a year in electricity, with a growing electric van fleet, sequenced its programme as above. Efficiency measures trimmed demand first. A 220 kW rooftop solar array, funded on an on-site PPA at zero capex, then covered the bulk of daytime load, with a 215 kWh battery lifting self-consumption to around 82% and covering the early-shift ramp. Twelve 22 kW chargers, part-funded by the Workplace Charging Scheme, moved the fleet onto self-generated power. Modelled outcome: about 205,000 kWh generated a year, roughly £61,000 saved, a six-year payback on the owned elements, and a renewable disclosure strong enough to hold a national contract. Your figures will differ; the point is the order.

What it costs, and what to do next

Costs scale with each measure. As a rough guide, efficiency projects run from a few thousand pounds, commercial solar is roughly £600 to £1,300 per kWp, battery storage £20,000 to £500,000, heat pumps £30,000 to £750,000, and EV charging from £3,000 for a couple of posts to £150,000 plus for a rapid hub. After capital allowances and grants, the effective net cost of owned kit is well below the headline, and a PPA removes the upfront figure entirely. We break the full stack down side by side on our cost page.

The honest starting point is not a quote for solar. It is an independent assessment of your half-hourly meter and gas data, your building, your heat demand and your fleet, so the roadmap is sequenced by return rather than by whatever a single-product installer happens to sell. That assessment is free and commits you to nothing. When you are ready, request your assessment and roadmap and we will model cash purchase, asset finance and a zero-capex PPA against each other, with the payback and tonnes of CO2 saved for every measure, so the board can decide on merit.