The transition to renewable electricity is often presented as a simple replacement of one source of energy with another. Replace coal and gas with wind turbines, solar panels and batteries, and little else changes. The reality is very different. Every additional layer of technology needed to compensate for the shortcomings of intermittent generation makes the electricity system more complex, more expensive and potentially more fragile.

A recent warning from government technical experts illustrates the problem. Britain is rapidly installing large-scale battery storage systems to help stabilise the electricity grid when wind and solar output fluctuates. These batteries can respond almost instantly, making them valuable tools for balancing supply and demand.

However, the experts have identified an unexpected danger.

When the National Energy System Operator (NESO) issues a Capacity Market Notice warning that electricity shortages are becoming likely, battery operators have a commercial incentive to ensure their batteries are fully charged. If many operators respond at the same time by drawing large amounts of electricity from the grid, they could actually create the shortage they are preparing to prevent.

In other words, the solution itself could become part of the problem.

Complexity Creates New Risks

This is a classic example of what happens when increasingly complicated systems attempt to solve problems created elsewhere in the same system.

For over a century Britain’s electricity supply relied on large power stations producing continuous, predictable electricity. Demand varied throughout the day, but generation could usually be adjusted in a controlled way.

Renewable electricity changes that relationship. Wind turbines produce electricity when the wind blows, not necessarily when consumers need it. Solar panels produce their maximum output at midday rather than during the evening peak.

To compensate, we now need:

• enormous battery installations
• sophisticated forecasting systems
• automated trading algorithms
• reserve generating capacity
• expanded transmission networks
• increasingly complex control systems.

Every additional component introduces another possible point of failure.

None of these technologies is necessarily unreliable on its own. The problem is that the overall system becomes so interconnected that small events can trigger much larger consequences.

The Cost of Chasing Stability

Large batteries are impressive engineering achievements, but they are not free.

Consumers ultimately pay not only for the batteries themselves, but also for:

• construction
• maintenance
• replacement
• grid upgrades
• control systems
• reserve generating capacity
• market payments that keep backup systems available.

Much of this expenditure exists because renewable generation is intermittent. If electricity production were naturally predictable, many of these additional systems would not be required.

As the grid becomes more complicated, household electricity bills inevitably reflect that complexity.

Bigger Systems Need Bigger Solutions

National electricity networks have always been large engineering projects. But the increasing dependence on intermittent generation pushes centralisation even further.

The grid operator must monitor thousands of wind turbines, millions of rooftop solar panels, hundreds of battery installations and countless automated control systems.

Artificial intelligence, advanced forecasting and increasingly sophisticated computer control become essential simply to keep everything operating safely.

The irony is striking. Technologies often promoted as decentralised require unprecedented levels of central coordination.

What Localism Suggests

Localism approaches resilience from a different direction.

Rather than asking how to make one enormous national system increasingly sophisticated, Localism asks whether every community needs to depend so completely upon that single system.

Local electricity does not mean abandoning the national grid. Instead, communities could gradually develop complementary local energy systems that reduce dependence upon distant infrastructure.

These might include:

• local solar generation
• small-scale hydro where appropriate
• biomass from local woodland management
• combined heat and power schemes
• carefully managed community battery storage
• reduced overall electricity demand through efficient design.

The crucial difference is scale.

A community battery serving a village or neighbourhood is managed to meet local needs rather than participating in national electricity trading markets. Local users understand local demand patterns and can adapt their consumption accordingly.

If one local system develops problems, it affects hundreds or perhaps thousands of people rather than millions.

Resilience Rather Than Maximum Efficiency

Modern infrastructure has been designed to maximise efficiency.

Localism places greater emphasis on resilience.

An efficient system may perform extremely well under normal conditions but fail dramatically when unexpected events occur.

A resilient system may appear less efficient but continues operating when conditions become difficult.

Nature follows this principle. Healthy ecosystems contain redundancy, diversity and overlapping functions. If one species declines, others often compensate.

Highly centralised technological systems tend to eliminate redundancy because redundancy appears inefficient.

Unfortunately, redundancy is often what keeps systems functioning during crises.

Living Within Natural Limits

The battery warning is not really about batteries.

It is about the increasing complexity required to maintain an industrial energy system that is becoming harder to balance as high-quality fossil fuels become more expensive and renewable generation expands.

Each new technical solution creates further technical challenges.

More batteries require more control.

More control requires more computing.

More computing requires more infrastructure.

More infrastructure requires more investment.

The cycle continues.

Localism suggests a different path.

Rather than continually expanding technological complexity, communities can gradually reduce dependence on vulnerable national systems by producing more essentials locally – food, water, some energy, repair services and basic manufacturing.

This does not eliminate the national grid. It simply reduces the consequences when that grid comes under stress.

The future may belong not to the most technologically complicated societies, but to those that build the greatest resilience. True security comes not from ever more elaborate systems designed to prevent failure, but from communities that can continue functioning when those systems inevitably encounter their limits.