New NESO Analysis Shows Upfront Net Zero Costs and Long‑Term Bill Savings

The National Energy System Operator (NESO) concludes that meeting the UK government’s net zero targets is not only affordable, but is actually the lowest­cost option for the country overall once fuel savings and climate damages are included. While net zero requires tens of billions of pounds of extra investment each year, this is offset by lower fossil fuel use, reduced exposure to price shocks, and avoided environmental harm – and creates major opportunities for clean technologies such as solar PV and battery storage delivered by installers like Atlantic Renewables.

Net Zero Cost in Pounds and GDP

NESO’s economic annex estimates that the UK currently spends about 10% of GDP on its energy system, including fuel, infrastructure, vehicles, boilers and power plants. Across all its scenarios – including those that fail to meet climate targets – this share is projected to fall to roughly 5–6% of GDP by 2050 as the system electrifies and becomes more efficient.‌

In the net­zero­aligned “Holistic Transition” pathway, additional low­carbon investment runs at about £30bn a year on average to 2050, with a peak of up to around £60bn over the next decade as the UK builds out clean power, heat pumps and electric transport. These figures are significant, but they sit within an energy system that already involves annual spending of hundreds of billions of pounds, and NESO stresses that much of the extra capital is paid back through lower running costs, especially cheaper electricity from renewables.

For households and businesses, this means that while some upfront costs – such as installing heat pumps or solar PV with battery storage – are higher than continuing with gas boilers and grid­power, long­term bill reductions and improved resilience make the overall transition economically favourable. Atlantic Renewables’ engineers regularly see this in practice when well­designed solar PV systems dramatically cut daytime grid consumption and hedge against rising unit rates.

Why Net Zero is the Cheapest Pathway

NESO’s analysis compares multiple futures, including a “falling behind” pathway that slows climate action and misses the 2050 net zero target. When it adds up all investments, operating costs and the Treasury’s official estimate of climate damages from emissions, the net­zero­compliant “Holistic Transition” scenario emerges as the cheapest, saving around £36bn a year – roughly 1% of GDP – compared with the slower­action option. The largest savings come from avoided climate damage and reduced fossil fuel imports, which are often overlooked in headline debate.

If climate damages (NESO’s “carbon costs”) are ignored, “Holistic Transition” is around £14bn a year more expensive on average than “falling behind”, equivalent to about 0.4% of GDP. NESO notes that even this apparent saving largely disappears if fossil fuel prices turn out higher than expected, with the gap shrinking from £14bn to about £5bn a year under a high­price assumption. In that context, reducing dependence on imported gas and oil through domestic renewables – including rooftop solar PV and commercial solar arrays from Atlantic Renewables – is an economic risk­management strategy as much as a climate policy.

How Energy Spending Changes by 2050

NESO estimates that Britain could roughly halve the share of national income spent on energy by mid­century. This happens because net zero pathways shift spending away from imported fossil fuels and towards capital investment in domestic assets such as renewables, networks and efficient heating systems. Operational costs fall as electric technologies like heat pumps, EVs and solar­powered buildings use energy more efficiently and rely on “free” flows of wind and sunlight.‌

To illustrate, NESO finds that annual operating expenditure in the net­zero “Holistic Transition” pathway falls by about £33bn between 2025 and 2050, driven by lower gas use in homes and reduced oil consumption in transport. This is consistent with international findings that utility­scale solar costs fell by around 85% from 2010–2020, and that new UK offshore wind and large solar projects now often undercut the running cost of existing gas plants. For UK consumers, it means that investments in on­site solar PV and storage today, delivered by Atlantic Renewables and other reputable installers, position them to benefit from a progressively cheaper, cleaner electricity system.

If you are exploring how solar PV and battery storage could cut your long­term energy costs as part of the UK’s net zero journey, the Atlantic Renewables team of experts can provide a tailored design and quotation and explain likely payback times.

Investment Focus in Power, Heat and Transport

NESO’s modelling shows that the biggest extra investments needed for net zero compared with “falling behind” are in the power sector and buildings. Power requires large­scale deployment of offshore wind, onshore wind, solar PV and associated grid infrastructure, while homes need substantial investment in heat pumps, insulation and low­carbon heating systems. Transport investment includes accelerating EV uptake and charging networks, but NESO expects EVs to be cheaper to buy than petrol cars from 2027, making transport capital expenditure more favourable over time.‌

The shift towards electrified heat and transport increases electricity demand, but because that demand is met largely with renewables, total system costs still fall as a share of GDP. This creates a structural opportunity for building­integrated renewables: domestic and commercial solar PV with battery storage reduces peak loads, cuts grid reinforcement costs and provides flexibility to support EV charging. Atlantic Renewables already delivers such integrated systems, helping businesses and homeowners lock in lower­carbon, lower­volatility power as the wider energy system transforms.

Reduced Exposure to Fossil Fuel Price Shocks

One of NESO’s most important findings is how net zero pathways change Britain’s exposure to global fossil fuel price spikes. During the 2022 energy crisis, higher fuel prices added energy costs equivalent to about 1.8% of UK GDP compared with pre­crisis years. Under the 2050 “Holistic Transition” pathway, a similar shock would increase energy costs by only around 0.3% of GDP, because the system relies far less on imported gas and oil.

By contrast, in a “falling behind” scenario that keeps higher fossil fuel reliance, the economy remains far more vulnerable to future price surges. For households and companies, this volatility translates into bill uncertainty and planning risk; one reason many UK organisations are installing behind­the­meter solar PV and battery storage to secure more predictable energy costs. Atlantic Renewables’ engineers routinely design systems that maximise on­site consumption, allowing customers to ride out wholesale price spikes with less impact on their operating budgets.

What This Means for Households and Businesses

For individual households, the NESO analysis suggests that the main financial effect of net zero is a shift from paying rising fossil fuel bills to making targeted capital investments with long­term payback. Examples include replacing gas boilers with heat pumps, improving insulation, switching to EVs, and installing rooftop solar PV with or without battery storage. Well­sited domestic solar systems in the UK can often cover 50–70% of a typical home’s annual electricity demand, with battery storage pushing self­consumption even higher.

Businesses face similar trade­offs but at a larger scale, with opportunities to reduce operating costs, improve resilience, and demonstrate progress on ESG and net­zero commitments. Commercial solar PV and battery storage – areas where Atlantic Renewables specialises – can reduce grid demand during peak price periods, stabilise energy budgets and support electrification of processes and fleets. Over the medium term, NESO’s finding that energy costs fall to about half their current share of GDP underlines that this is a transition towards a cheaper, cleaner energy system, not a permanent new burden on the economy.

If you want to understand the potential costs and savings of a solar PV and battery system for your property within the context of the UK’s net zero pathway, Atlantic Renewables’ team of experts can provide site­specific advice and help you choose the right system size and configuration.

Get in touch

If you are looking to install a solar PV and battery storage system to reduce long­term energy costs under the government’s net zero plans, or you need support optimising an existing system, please get in touch with Atlantic Renewables and the team will be happy to help. Call 0161 207 4044 to speak with our engineers and start taking advantage of a high­quality solar solution tailored to your home or business today.