Frequently Asked Questions


Since 1 April 2018, Singapore has made it possible for consumers to select an authorised retailer to purchase electricity from. The Open Electricity Market (OEM) will be launching progressive in Singapore. For the soft launch, residential and small business consumers residing in Jurong (postal codes starting with 60 to 64) have the option to select their preferred electricity retailer. From 1st November 2018, all residential and small business consumers in Zone 1 (postal codes starting with 58 to 78) will be eligible.
From 1st January 2019, 
all Singapore residential and small business consumers residing in Zone 2 (postal codes starting with 53 to 57, 79 to 80 and 82 to 83) will also be eligible to switch to Diamond Electric.
From 1st March 2019, residential and small business consumers residing in Zone 3 (postal codes starting with 34 to 52 & 81) will be eligible.

The EMA’s intention is to introduce a variety of electricity plans that cater to different types of users. This will allow consumers to choose an electricity plan that meets their specific needs.


The process is very simple. Select your preferred electricity plan. Click here to see details of our electricity plans, then fill out an online application and make a security deposit (if required).

If you are a residential consumer, and do not opt for a new AMI Meter (i.e. Smart Meter) to be installed by SP Group, it will take 5 business days.

If you are a business consumer, or require a new AMI Meter (i.e. Smart Meter) to be installed by SP Group , it could take longer, up to 30 days.

No, there will not be any electricity disruption. The electricity infrastructure is still maintained by SP Group, which means that there will be no change to your existing meter (unless you opt for a new AMI Meter i.e. Smart Meter) or wiring. Diamond Electric will only be taking over the billing and financial obligations pertaining to your electricity supply.

In the event any electricity retailer ceases to operate, the EMA has mandated that all their customers will be switched back to SP Group. There will not be any disruption to the electricity supply.

No. There will not be any change to your existing meter (unless you opt for a new AMI Meter i.e. Smart Meter) or wiring. Your meter will continue to be managed and read by SP Group.

No. Residential customers do not need to install a new AMI Meter (i.e. Smart Meter), however if you choose to have one installed by SP Group, then there will be a meter installation fee by SP Group that Diamond Electric will pass through to you. 

Businesses are required to have an AMI Meter (i.e. Smart Meter) installed at their premises by SP Group to measure and remotely read their half-hourly electricity consumption. There will be a meter installation fee by SP Group that Diamond Electric will pass through to you. 


Diamond Electric offers Discount off Tariff plans. Discount off Tariff plans offer you a percentage discount from the prevailing regulated tariff, so you can enjoy guaranteed savings. The tariff is revised by SP Group and is regulated by Energy Market Authority (EMA) every three months in January, April, July and October.

Click here to view all our plans.

The regulated tariff is published by SP Group and regulated by Energy Market Authority (EMA) every quarter. A discount off tariff provides a fixed percentage discount from this prevailing tariff to the consumer.

SP Group publishes the regulated tariff every quarter or once every three months. The regulated tariff applies as the tariff for customers of SP Group during the period for which it is announced. You can view the current regulated tariff at this site: https://www.ema.gov.sg/Residential_Electricity_Tariffs.aspx

SP Group determines the tariff and this tariff is regulated by Energy Market Authority (EMA). It is a rate which is determined based on 2 main components – fuel cost and non-fuel cost. You can learn more about the breakdown of the regulated tariff at this site: https://www.ema.gov.sg/Residential_Electricity_Tariffs.aspx

There are no one-time or registration fees when you switch to Diamond Electric.

Diamond Electric is committed to providing rates and plans which are transparent. Some third-party charges may be passed on to our consumers. The full list of charges that may be applicable to you can be found here: https://diamond-electric.com.sg/resources/

Diamond Electric, a subsidiary of Diamond Energy, has been in the energy business for more than 10 years. We leverage on commercial efficiencies, such as technology, sales, and marketing to keep costs and overheads at an optimum level, thus keeping the prices for the electricity plans that we offer competitive and affordable.


Please do not hesitate to contact us on 6-DIAMOND (6-342-6663) or email us at custcare@diamond-electric.com.sg and we will glad to assist.

Only residential consumers will still be eligible for U-Save. Please visit: https://www.openelectricitymarket.sg/residential/faqs/u-save-rebates for more information.

Your U-Save rebates will be applied to both your SP Group bill for water, gas and waste removal service (if any) and your Diamond Electric bill for electricity, in the following way:

The U-Save rebates will be applied to your SP Group bill first and any remainder will be applied to your Diamond Electric bill.

For more information, please visit: https://www.openelectricitymarket.sg/residential/faqs/u-save-rebates for more information.

We have GIRO, Credit Cards, AXS, internet banking, and cheque available as payment modes. Please visit diamond-electric.com.sg/payment

SECURITY DEPOSIT (Currently waived for Residential customers)

Your security deposit is calculated based on the last three months average electricity bill multiplied by two. Basically, a two-month bill amount is required to be placed as a security deposit. (Currently security deposit is waived for residential consumers when they sign up to our plans)
If less than three month’s bills are available, we will use the bills for calculation. In the event that no bills are available, we will apply the standard rate to determine your security deposit. Please refer to https://diamond-electric.com.sg/resources/ for details on our standard Security Deposit rates.

SP Group will re-calculate the security deposit required by them in relation to the other services provided to you, such as water, gas, and waste removal services. The excess amount will then be credited to your SP Group account and be used to off-set your charges on subsequent bills for the remaining services provided.

Your Security Deposit will be returned to you after offsetting any balance in your account.


When your contract is up for renewal, we will notify you by issuing a reminder to you at least 30 days prior to the expiry. In the event we are unable to contact you, or we do not receive a reply from you at least 14 days prior to the expiry of the contract, it will be automatically renewed to (a) the same contract duration and (b) the renewed electricity rate will be 5% off the prevailing regulated tariff at the point of renewal. Within the first 30 days from the start of the renewed contract, you may terminate the contract as long as prior written notice of at least 30 days is given.

If you are on a plan on which there is a contract period, and the contract period is not yet satisfied, you may be liable for an early termination penalty. Visit https://diamond-electric.com.sg/resources/ for more information.

Please do not hesitate to contact us on 6-DIAMOND (6-342-6663) and we’ll be glad to assist.

If you move to a different premise during the contract period, we can arrange to transfer the balance of your contract period to your new premises.

There may be an early termination charge, according to your contract.

Please click here for more information.


In the unlikely event that there is an electricity disruption, please do not hesitate to contact us. The electricity supply and infrastructure continue to be maintained by SP Group. You can contact us on 6-DIAMOND (6-342-6663) or contact SP Group directly at 1800-778-8888 for assistance.

Please do not hesitate to call us on 6-DIAMOND (6-342-6663) if you have any feedback.

If applicable, we have a dispute resolution process which can be found here. Should you have any feedback, we would like to hear from you and use that to engage with you in a mutually benefitting way, allowing us to provide you with superior service and continuous improvement.

We have various channels available for you to contact us and they are listed below:

Tel : 6-DIAMOND (6-342-6663, +65 6342-6663 from overseas)

Email : custcare@diamond-electric.com.sg

Powering Singaporean homes and businesses

Diamond Energy Merchants Pte. Ltd. 

Electricity Retail licence no. EMA/RE/009
Company registration no. 201116636
All rights reserved 2018

1 CleanTech Loop, #02-08 CleanTech One, Singapore 637141
Tel 6342 6663 | Fax 62423638
Email: enquiries@diamond-electric.com.sg