100 Green: Compare Business Energy Deals Online

Formerly known as Green Energy UK, 100 Green is the UK’s only energy supplier to offer 100% Green Gas alongside 100% renewable electricity. As many suppliers use carbon offsetting to claim green credentials, 100 Green stands out for its Deep Green philosophy: sourcing power directly from UK generators without relying on accounting tricks.

For businesses that want their sustainability claims to be bulletproof, 100 Green offers a premium, boutique service that prioritises ethics over mass-market volume.

Why Choose 100 Green for Your Business Energy?

100 Green is frequently ranked as one of the best suppliers in the UK by Citizens Advice and Which?, largely due to their commitment to domestic, high-quality renewables.

• The Only 100% Green Gas: While most green gas is actually fossil gas with carbon offsets, 100 Green’s Spark tariff uses 100% biomethane produced from farm waste and food scraps

• No Greenwashing: They do not use low-quality REGO certificates to green up brown energy. Every unit of power is traced back to a specific UK wind, solar, or hydro generator

• UK-Based Human Support: They are famous for their old-fashioned customer service. When you call, you typically speak to a real person in their Hertfordshire office within seconds, no complex automated menus

Business Energy Tariffs Breakdown

100 Green offers a simplified range of tariffs designed for transparency rather than complex teaser rates.

1. Small Business and SME Tariffs

• Eko (Electricity only): Their flagship electricity-only tariff. It is 100% renewable and sourced entirely from UK generators. It is available as a fixed-rate deal for 1 or 2 years

• Spark (Electricity & Gas): This is the gold standard for sustainable businesses. It combines 100% renewable electricity with 100% green gas, making it the most environmentally rigorous tariff available in the UK

• Variable Business: For companies that don't want to be tied down, 100 Green offers variable rates with no exit fees, though these prices can fluctuate with the wholesale market

2. Large Business and Multi-Site

For larger organisations, 100 Green provides bespoke quotes that reflect the specific usage profile of the company. Because they are a smaller supplier, they often provide a more personal touch for multi-site managers compared to the Big Six.

Sustainable Energy Services

100 Green has focused on helping businesses close the loop on their energy cycle:

• Smart Export Guarantee (SEG): If your business has solar panels, 100 Green offers some of the market's most competitive export rates, rewarding you for sending clean energy back to the grid

• Biomethane Consulting: For businesses in the agricultural or food waste sectors, 100 Green provides advice on how to contribute to the green gas grid

• Transparent Reporting: They provide detailed Fuel Mix reports that businesses can use in their annual sustainability filings to prove their energy is 100% renewable and 0% carbon

Pros and Cons of 100 Green Business Energy

The Pros

• Unmatched Green Credentials: They are the only supplier providing 100% green gas, making them the top choice for businesses with high gas usage (like restaurants or laundries)

• Exceptional Service: Regularly tops the Citizens Advice league table for fewest complaints and fastest call-answering times

• Ethical Transparency: No hidden carbon offsets or accounting green energy

The Cons

• Premium Pricing: Because they source genuine green gas and UK renewables, their unit rates are almost always higher than the market average

• Price Cap Exemption: 100 Green is one of the few suppliers exempt from the Ofgem price cap because of their high investment in renewables, meaning their variable rates can be very high

• Smaller Infrastructure: Unlike E.ON or Scottish Power, they have fewer resources for large-scale EV charger rollouts or massive industrial battery installations

Customer Consensus: What Businesses Say

The consensus among 100 Green customers is that the extra cost is worth the peace of mind and the service quality.

• The Positive: With a Trustpilot score typically around 4.8/5, customers rave about the refreshing lack of automated phone systems and the technical knowledge of the staff

• The Negative: Most negative feedback relates purely to the cost. Some businesses have found it difficult to justify the green premium during periods of high inflation

The Procurement Process: Moving to 100 Green

1. Request a Quote: Visit the 100 Green business site. You’ll need a recent bill to provide your annual kWh usage.

2. Select Your Shade of Green: Choose between the standard renewable electricity (Eko) or the full green gas and electricity (Spark) package

3. Smooth Transition: 100 Green is known for a high right first time switch rate, handling the move from your previous supplier without interruption

4. No Exit Fees: Even on many of their fixed-term SME contracts, 100 Green maintains a policy of low or no exit fees to encourage long-term loyalty rather than forced lock-ins

Existing 100 Green Customers: How Our Advisers Can Help

If you are already a 100 Green customer, Money Helpdesk can help you manage your relationship with this premium supplier. Our advisers provide:

• Cost-Benefit Analysis: We can help you run the numbers to see if the green gas premium is still delivering value for your brand or if a more standard renewable plan would suffice

• Renewal Tracking: We ensure you stay on a fixed-term deal. Since 100 Green’s variable rates are often quite high, missing a renewal window can be costly

• Smart Meter Integration: We can help you coordinate with 100 Green to ensure your business has the latest SMETS2 technology to monitor your usage in real-time

• Multi-Site Consolidation: If you have acquired new premises, we can help you move them onto your 100 Green portfolio to simplify your admin

Compare Business Energy Quotes Today

Business energy prices change daily based on global wholesale markets. To find the most competitive rate for your specific location and usage profile, it is recommended to get a bespoke quote or consult with a dedicated business energy adviser. Our advisers also offer a bill validation service which involves reviewing all of your past, current and future bills from 100 Green to see if you have ever been overcharged.

Get started here to begin a free, no-obligation chat with a business energy adviser who specialises in British Gas’ products and services and can help you decide whether they are the right supplier for your business.