Solar vs Grid Electricity: Which is Cheaper for UK Businesses?

Energy costs are one of the biggest overheads for UK businesses — and they’ve become increasingly unpredictable.

This has led many organisations to ask:

👉 Is solar cheaper than grid electricity?

In most cases, the answer is yes — especially when using a Power Purchase Agreement (PPA).

In this guide, we compare solar vs grid electricity, break down real costs, and explain why more businesses are switching to onsite renewable energy with Vega.

The Cost of Grid Electricity for UK Businesses

Grid electricity prices for businesses are influenced by:

• Wholesale energy markets

• Network and distribution costs

• Supplier margins

• Government levies and environmental charges

As a result, prices are highly volatile.

Typical UK business electricity rates:

👉 20p – 35p per kWh (and sometimes higher during peaks)

This volatility makes it difficult for businesses to:

• Forecast costs

• Plan budgets

• Maintain stable operating margins

  
  

The Cost of Solar Electricity (PPA Model)

With a commercial solar PPA, electricity is generated onsite and sold directly to your business at a fixed or predictable rate.

Typical PPA pricing:

👉 Around 12p – 19p per kWh

With Vega, there is:

• No upfront cost

• No maintenance responsibility

• No exposure to wholesale energy markets

You simply pay for the electricity you use — at a lower, more stable price.

Solar vs Grid Electricity: Side-by-Side Comparison

Factor	Grid Electricity	Solar (PPA with Vega)
Price per kWh	20p – 35p+	~12p – 19p
Price stability	Highly volatile	Predictable
Upfront cost	None	None
Long-term savings	No	Yes
Carbon emissions	High	Low (renewable)
Energy source	Centralised grid	Onsite generation

👉 Key takeaway: Solar provides cheaper and more predictable electricity.

Why Solar is Cheaper Than Grid Electricity

There are several reasons why solar energy costs less:

1. No Fuel Costs

Solar uses sunlight — there is no ongoing fuel expense like gas or coal.

2. Reduced Network Charges

Electricity generated onsite avoids many of the costs associated with transmission and distribution.

3. Long-Term Pricing

Solar PPAs offer stable, long-term pricing, unlike grid electricity which fluctuates daily.

4. Lower Operating Costs

Once installed, solar systems have relatively low operating and maintenance costs.

Example: Solar vs Grid Cost Comparison

Let’s look at a realistic example:

Business electricity usage:

• 200,000 kWh per year

  
  

Grid-only scenario:

• 25p/kWh

• Annual cost: £50,000

  
  

With Vega solar PPA:

• Solar price: 15p/kWh

• 50% supplied by solar

  
  

New blended cost:

• Solar: 100,000 kWh × £0.15 = £15,000

• Grid: 100,000 kWh × £0.25 = £25,000

• Total: £40,000

👉 Annual saving: £10,000 (20%)

Important: Solar Doesn’t Replace the Grid Completely

Solar works alongside the grid — not instead of it.

• Solar generates electricity during daylight hours

• The grid supplies power when solar is not generating

  
  

However:

👉 A system can be designed so that annual solar generation matches annual consumption

This means a business can become:

👉 Net zero for electricity, even while still importing and exporting energy at different times.

Beyond Cost: Why Businesses Are Switching to Solar

While cost is the main driver, businesses are also choosing solar for:

Energy Security

Reduced reliance on volatile energy markets.

Sustainability

Lower carbon emissions and improved ESG performance.

Reputation

Demonstrating commitment to renewable energy.

Future-Proofing

Protection against rising electricity prices.

Why a Solar PPA is the Smartest Route

Buying solar outright requires capital investment.

A PPA removes that barrier.

With Vega:

✅ No upfront cost

✅ Immediate savings

✅ Fully managed solution

✅ Long-term price certainty

Vega handles everything — from installation to monitoring and billing.

Why Choose Vega?

Vega is changing how commercial solar PPAs are delivered in the UK.

Simple Agreements

Clear, transparent contracts without unnecessary complexity.

Flexible Structures

Choose how you pay for energy — consumed, generated, or hybrid.

Local Installers

Delivered by trusted local partners.

Fully Managed

A complete, hands-off energy solution.

Is Solar Cheaper Than Grid Electricity?

For most UK businesses:

👉 Yes — solar is cheaper than grid electricity

And with a PPA, it’s also:

• Lower risk

• Easier to implement

• Immediately beneficial

Final Thoughts: Take Control of Your Energy Costs

Grid electricity is becoming more expensive and less predictable.

Solar offers:

• Lower costs

• Greater certainty

• A path to net zero

With Vega, switching to solar is simple — and requires no upfront investment.

See how much your business could save vs the grid. Speak to Vega today for a tailored comparison and proposal.

FAQ

Is solar cheaper than grid electricity in the UK?

Yes — solar typically costs 12p–15p/kWh, compared to grid electricity at 20p–35p+.

Do businesses still need the grid with solar?

Yes — solar works alongside the grid to ensure continuous power supply.

Can solar protect against rising energy prices?

Yes — solar PPAs provide long-term price stability, reducing exposure to market volatility.

See our full FAQ here.