Green Star Energy launched its services to UK residential customers in October 2013 as an expansion of its US holding company, Just Energy Group Plc. In October 2019, it was announced that Green Star Energy had been acquired by a larger provider and that customer accounts would be transferred. Read on to find out more.

Green Star Energy customers were transferred to Shell Energy in late 2019. For details about the new supplier, head to our Shell Energy guide.

Domestic Market: England, Scotland & Wales  Provided green energy
Customers: 200,000  Installed smart meters
Energy sources: Renewables  Expensive rates
Fuel mix score: ★★★★★  Poor complaints handling
Selectra score:  Closed in late 2019

Green Star Energy FAQs

Let's have a look at some common questions that customers may have about Green Star Energy.

1. What happened to Green Star Energy?

Green Star Energy was aquired by Shell Energy in late 2019. All former Green Star customers should be transferred over to the new energy supplier by now. The transfer would have had no impact on your supply.

Shortly before your account was transferred, Green Star Energy should have sent you details about the move. Once the supply was transferred, you should have then received details about your new account, such as the new account number. Prepayment customers would have received new keys and cards to top up their meters.

2. How do I pay my Green Star Energy bill?

Since Green Star Energy has ceased trading, you will now need to pay your energy bill to Shell Energy. You account balance with Green Star should have been transferred to the new supplier. You can pay your bill either on the Shell website or by contacting the supplier by phone.

3. Are Hudson Energy and Green Star the same company?

Hudson Energy was Green Star Energy's parents company. On your Green Star bank statment, you would have seen the name Hudson Energy Supply UK. Shell aquired Hudson Energy in late 2019, thus also aquiring Green Star Energy and its customers.

4. Where is Green Star Energy based?

As part of Shell Energy, Green Star Energy was based in Coventry, United Kingdom.

5. Who is the CEO of Green Star Energy?

The former CEO of Green Star Energy was Joanne Thornton. She came under fire in 2018 when an elderly customer had £27,000 taken out of her bank account due to a Green Star mistake. Now part of Shell Energy, the current CEO is Colin Crooks.

Green Star Energy Tariffs

Electricity bill

Before it was acquired by Shell, Green Star Energy provided the following four green energy tariffs:

  • Save Money Cut Carbon 36M v2
  • Fix for Longer 24m v4
  • Fix for Longer 36m v4
  • Standard PAYG

Green Star Energy claimed it could save customers £176 per year if they switched away from a member of the Big Six and onto one of its products. Since the Shell aquisition, these Green Star Energy tariffs are no longer available to sign up to, nor can you get a Green Star quote on the website.

If you were on a fixed Green Star Energy tariff, your tariff terms and conditions will be honoured for the remainder of the contract. You will then be switched to the Shell standard tariff unless you select a different plan or switch your energy supplier You should be notified of the available tariff options 49 days before your Green Star Energy tariff is set to end.

If you haven't updated your tariff recently, you're likely on the Shell standard tariff. You can find the rates in the table below. Calculations are based on an average household in London.

Standard Energy Prices
Cost Type Price
Electricity unit rate 16.960p per kWh
Electricity standing charge 23.710p per day
Gas unit rate 3.104p per kWh
Gas standing charge 26.070p per day
Estimated monthly bill £87
Estimated annual bill £1,046

Is your energy tariff too expensive?You can save hundreds of pounds on your energy bill just by switching supplier. Talk to one of our energy experts and see how much you could save. Call 020 3936 0059 or get a free callback now.

Green Star Energy Reviews

According to Chief Executive of Citizens Advice Gillian Guy, “When a company is struggling, customer service is often the first thing to suffer.” Did Green Star Energy reviews foreshadow the supplier closing? We did some digging through Green Star Energy customer reviews to find out.

On Trustpilot, there are more than 7,000 Green Star Energy customer reviews. The supplier has an overall score of 2.6 out of five stars. Of the customers that left reviews, 51% gave Green Star an either great or excellent rating. On the other hand, 45% of the reviews gave the supplier a poor or bad score.

While these reviews appear quite mixed, we noticed that the more recent customer reviews are overwhelmingly negative. Many customers commented on the supplier's poor complaints resolution process, as well as reported having issues with their final bill.

I left Green Star over a year ago and paid the remaining amount. They have hounded me ever since and had two separate debt collecting companies hound me also for several different amounts of money.

LizaTrustpilot review

If you're experiencing problems with your Green Star Energy account, it's best for you to contact Shell to get them resolved. For a more in-depth look at Green Star reviews, head to our dedicated Green Star Energy reviews guide.

Don't sign up before checking our supplier reviewSwitching to the wrong supplier could cost you hundreds of pounds a year. Our energy advisers can help you find the best supplier for your home. Call 020 3936 0059 or Get a free callback now.

What are Green Star Energy Perks?

With a Green Star Energy Perks Rewards account, customers were able to earn points every three months that could be redeemed for the following:

  • Smart energy products to help reduce your energy usage
  • Gift cards from popular shopping, dining and entertainment retailers

Customers could redeem their Green Star Energy Perks Rewards points in three easy steps:

  1. See the list of rewards on their website.
  2. Pick the perk you want.
  3. They’ll deliver it to your doorstep.

While customers with a Green Star Energy Perks Rewards account were originally able to receive points with Shell, it appears these rewards are no longer available.

Shell rather has its own rewards programme that gives fuel discounts, as well as discounts on other products, such as hot drinks and snacks at Shell service stations. To benefit from these rewards, you will need to register for Shell Go+ on the supplier's website.

If you have Green Star Energy Perks points that you haven't used, try contacting the Perks team by either calling 0800 029 1561 or sending an email to Your Green Star Energy Perks points should be valid for up to two years.

Green Star Energy Smart Meters

Electricity meter

Before being aquired by Shell Energy, customers were able to book smart meter installations on the Green Star website. If you did not have a Green Star smart meter installed, you will need to contact Shell to book an installation.

Here at Selectra, we can also help to set you up with a smart meter, as well as a cheaper tariff. With a smart meter, you can track your energy consumption in near real-time. This can help you to cut back on your consumption and reduce your energy bills!

For more information, give us a call on 020 3936 0059 to speak with one of our energy advisers for free.

Submit Your Meter Reading

Former Green Star Energy customers are no longer able to submit meter readings to Green Star over the phone nor online. You will need to submit the meter readings to the new supplier instead. If you have an ongoing meter reading dispute with Green Star, you should call the supplier on 0800 012 4510.

When your energy supply was transferred, Shell Energy should have informed you to start sending your electricity and gas meter readings each month (unless you have a smart meter, then your readings will automatically be sent). As with Green Star, you'll be able to submit meter readings through your new online account with Shell or via the app.

Moving home with Green Star?

Customers can no longer register with Green Star Energy. If you're already a customer and need to inform the supplier that you're moving, you'll now need to contact Shell Energy.

Ensure you have the following details to hand:

  • The date you are moving house.
  • Your new address so that they can send you your final bill.
  • The meter reading(s) for the date you moved out.
  • Your new telephone number if applicable.

Warm Home Discount

Green Star was part of the Warm Home Discount scheme, which gives customers a £140 discount towards their energy bills. Members from both the "Core Group" and the "Broader Group" were able to receive the discount with the supplier. Core Group members received the discount automatically, while Broader Group members had to apply each year.

Eligible customers can still apply for the scheme with Shell via an online form on the supplier's website. Broader Group members should apply as soon as the application opens, as it is rewarded on a first come, first served basis.

To find out if you're eligible and when to apply, check out our Warm Home Discount guide.

What is the Green Star Energy contact number?

Talk to a real person - FastYou won't have to talk to a machine or wait on hold for hours. Our free service will put you through to a real person without the wait. Call 020 3936 0059 or get a free callback now.

Even though the supplier announced it was closing more than a year ago, the Green Star Energy contact number still works. To speak with a customer service representative, call 0800 012 4510. However, unless your query concerns an issue you had with Green Star, it's best to contact your new supplier instead.

In the following table, you can find the general Green Star Energy contact number. You'll also find the general contact number for the new supplier, emergency contact numbers and the number for the Energy Ombudsman. For more contact information relating to the new supplier, head to our dedicated Shell Energy contact page.

Green Star Energy Contact Number
Department Phone number Opening hours
Green Star Energy 0800 012 4510 Monday to Friday: 8:30am-6:30pm, Saturday: 9am-4pm
Shell Energy 0330 094 5800 Monday to Friday: 8:30am-6:30pm, Saturday: 9am-4pm
Power cut 105 24/7
Gas emergency 0800 111 999 24/7
Energy Ombudsman 0330 440 1624 Monday to Friday: 8am-8pm, Saturday: 9am-1pm

Emergency Contact Numbers

The last thing you need with an emergency on your hands is to be placed on hold. In the case of an emergency, you should not contact Green Star to report it. Find out who to contact below.

Do you smell gas?

If you suspect or detect a gas leak in your home, you will need to follow these instructions as soon as possible to avoid potentially dangerous consequences.

  1. Call the National Gas Service Emergency Line at 0800 111 999. Follow their instructions. They will send an engineer to your home to repair the leak.
  2. Turn off your gas supply. Find the gas emergency control valve and turn the handle by a quarter so the lever is at 90 degrees to the Emergency Control Valve's body.
  3. Open all windows and doors.
  4. Get out. Leave your home and stand somewhere in a safe place until the gas engineer arrives at your home.

IMPORTANT! Don't turn electrical switches on or off. Never smoke, light any incendiary device, strike matches or do anything that could cause ignition. Don’t use any electrical devices (including your mobile) in your home until the gas engineer has arrived. If you need to open electric doors or gates, then do so manually.

Got a power cut?

If there’s a power outage either in your building or your neighbourhood, call 105 to report it.

If neighbouring homes have electricity but yours doesn't, then the problem may lie with your home’s electrical wiring. Call a certified electrician to fix the wiring issues in your home.

Other Ways to Contact Green Star Energy Customer Service

An addition to the Green Star Energy contact number, the supplier offered a host of other ways for customers to reach out.

Contact by Social Media

Green Star Energy's social media channels included WhatsApp, Facebook and Twitter. The WhatsApp number is no longer available. On Facebook, Green Star Energy posted on 4 February 2021, that it would be closing down the account at the end of the month. On Twitter, the supplier has been silent since October 2020.

Contact by Email

If you prefer to send an email, we recommend sending it to the new supplier, as they have your latest account details. If you choose to send an email to the Green Star Energy email address, you'll get an automated response that will point you to either:

  • Log in to your online account
  • Submit your meter readings online (only to find that service is no longer available)

Want to email your new supplier? Find the best email address for your query in our Shell contact guide.

Contact Green Star Energy by Post or in Person

The traditional pen and paper may be your preferred way of contacting Green Star. You may want to go to their offices in person to discuss it with them. Whatever your preference, note down the address of the Green Star Energy head office: 3rd Floor, Elder House, 586-592 Elder Gate, Milton Keynes MK9 1LR, United Kingdom

Green Star Energy Complaints

If you have an outstanding complaint with Green Star, the supplier will continue to handle your complaint. To discuss the complaint with Green Star, either call 0800 012 4510 or send an email to

If your complaint is regarding an issue that took palce after the supply was transferred to the new supplier, you will need to file your complaint with Shell Energy rather than with Green Star.

Escalating your Complaint

Customers unhappy with the response would first need to escalate the complaint internally by contact customer service. When doing so, a Complaints Manager would independently review the decision taken by the Complaints Lead. Green Star aimed to respond within five working days.

As with all energy suppliers, if your complaint has not been resolved within eight weeks, you can then escalated it externally to the Energy Ombudsman for an independent review. To contact the Ombudsman, call 0330 440 1624. Lines are open Monday to Friday from 8 a.m. to 6 p.m.

If you prefer to write to the Ombudsman, you can either send an email to or write a letter addressed to the following: Ombudsman Services: Energy, PO Box 966, Warrington, WA4 9DF.