Singapore's Electricity Market Explained: SP Group, Open Electricity Market, and Solar
Singapore's Open Electricity Market lets households choose their electricity retailer, but solar homeowners under ECIS must remain with SP Group as their account holder. If you have switched to a retailer, switch back before installing solar — retailers cannot administer solar export credits.
Key Takeaways
- 1
Solar homeowners under ECIS must have SP Group as their electricity account holder — if you have switched to an OEM retailer, switch back before installing solar
- 2
SP Group is the licensed grid operator in Singapore and administers ECIS — electricity retailers do not participate in the solar export credit scheme
- 3
Switching back to SP Group from an OEM retailer is straightforward and typically takes one billing cycle — initiate it before your site survey, not after signing a contract
Singapore's electricity market has two layers that confuse many homeowners planning to install solar. The Open Electricity Market (OEM) allows households to choose their electricity retailer, switching from SP Group's regulated tariff to a private retailer's pricing plan. And the Enhanced Central Intermediary Scheme (ECIS) is how solar homeowners get credited for electricity they export to the grid. These two systems interact in a way that is not obvious until you are mid-installation, and the consequences of getting it wrong add weeks of delay.
How the Open Electricity Market Works
Singapore's electricity retail market was fully opened to residential customers from November 2019. Households can choose from approved electricity retailers (Geneco, Senoko Energy, iSwitch, and others) offering fixed-rate, discount, or market-indexed plans. The grid itself, the physical wires, transformers, and metering infrastructure, remains SP Group's responsibility as the licensed network service provider. Retailers simply charge you for the electricity you consume; SP Group continues to operate the network.
For most households, switching to a retailer means potentially paying less per kWh if the retailer's rate undercuts the SP Group regulated tariff. This is the benefit. The complication for solar homeowners is in what happens to export credits.
Why Solar Homeowners Must Be on SP Group
The Enhanced Central Intermediary Scheme credits solar exports at the Solar Crediting Tariff of S$0.2581/kWh. These credits appear on your SP Group bill as a deduction from your electricity charges. This mechanism is administered entirely by SP Group as the licensed grid operator. Electricity retailers are commercial entities that buy wholesale electricity and resell it, they have no role in the solar export credit framework and no ability to pass through ECIS credits.
If you have switched to an electricity retailer under OEM and then install solar, your ECIS application will fail or stall because the solar export credit account must link to an SP Group GIRO account. Your installer will eventually surface this issue during the SP Group application process. The resolution is to switch back to SP Group, but this takes one to two billing cycles (one to two months) and means your solar system cannot be commissioned until the transfer completes.
The practical instruction: if you are on an OEM retailer and planning to install solar, initiate your switch back to SP Group before your site survey, not after signing an installation contract. It costs nothing to switch and avoids a delay that most installers do not flag proactively.
One Scenario Where an OEM Retailer Still Has a Role
There is one niche scenario where an electricity retailer rate remains relevant alongside solar: if a retailer offers a significantly discounted rate (say, 10% below SP Group's regulated tariff) for the electricity you import from the grid, that is, consumption that your panels do not cover. Since a solar system in Singapore still imports grid power at night and during prolonged cloud, this import rate matters.
In practice, the discount retailers offer on residential plans is typically 2 to 8% below SP Group, on an annual import bill of S$2,000 to S$4,000 (post-solar), this saves S$40 to S$320 per year. This is real but small. And it requires switching back to SP Group if you want ECIS to work, then potentially re-signing with a retailer after the solar system is commissioned and ECIS registered, which some households do. The logistics are manageable; the savings are modest.
Check your electricity account before you sign a solar installation contract. If you are with an OEM retailer, start your SP Group transfer immediately. That one step can save six weeks of commissioning delay.
The ECIS explainer covers the export credit scheme in full detail. For your system estimate, run the Sunnify calculator which uses current SP Group tariffs as the baseline for both consumption savings and export credits.
Further reading: SP Group electricity market overview · EMA open electricity market guide.
How do I switch from an OEM retailer back to SP Group in Singapore?
Log into your SP Group account at spgroup.com.sg or call the SP Group helpline. You can initiate a switch back from a retailer to SP Group's regulated tariff through the Open Electricity Market portal (openelectricitymarket.sg) or directly with SP Group. The process requires giving your current retailer the contractually required notice period, check your retailer contract for the minimum notice requirement, which varies from 30 days to three months depending on your plan. After the transfer date, your billing returns to the SP Group regulated quarterly tariff automatically.
Will my solar ECIS credits be affected if I switch from SP Group to a retailer after commissioning?
This is a question worth raising with SP Group directly before making any changes after your solar system is commissioned. In principle, your ECIS registration is linked to your meter point identifier (MPID), not to who bills you for consumption. However, the practical billing integration between a retailer's system and SP Group's ECIS credit administration is not universally smooth. Some homeowners have reported complications when switching to retailers after installing solar. Until EMA clarifies the position formally, the safest approach is to remain with SP Group while your ECIS registration is active.
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What does this mean for your home?
Tariffs and technology change the math. The calculator uses current SP figures to show your actual payback and savings.
