A solar power system installed to lower a Kenyan household’s electricity bill could expose the owner to additional charges if it sends excess electricity into the Kenya Power network without the required approval.
The warning is increasingly important for households and businesses that have installed rooftop solar while remaining connected to the national grid.
Under Kenya’s electricity framework, customers cannot simply generate power and feed surplus electricity into the Kenya Power distribution network without an approved arrangement. Where electricity is injected into the network without prior authorisation or a valid net-metering agreement, it can be treated as dumping and attract the applicable charge under the approved tariff framework.
The development does not mean Kenyans with solar panels will automatically start paying a new fee simply because they own or use solar power.
The key issue is whether electricity is being exported to the Kenya Power network without approval.
That distinction could determine whether a solar installation remains a money-saving investment or creates an unexpected electricity bill for a household or business.
When can a solar system trigger charges?
The problem arises when a grid-connected solar installation produces more electricity than the property is consuming and the excess flows back into the Kenya Power network.
A typical household may generate substantial electricity around midday when sunlight is strongest, even though many occupants are away at work or school.
If the system is configured to export electricity, surplus power can flow into the distribution network.
For a customer operating under an approved net-metering arrangement, that export is regulated.
For an unauthorised customer, however, the electricity flowing into the network can create a compliance problem.
Kenya’s Energy (Net-Metering) Regulations, 2024 define net metering as a mechanism allowing consumers to supply electricity to the grid during periods of overproduction and use credited energy at another time. The regulations apply to renewable-energy systems with an installed capacity of less than 1 megawatt.
This means having solar panels and exporting electricity to the grid are two different things.
A homeowner can use solar electricity on the premises without automatically becoming a net-metering customer. But once the installation is designed or configured to export power to the grid, the regulatory requirements become important.
Kenya’s rules require an approved net-metering arrangement
The 2024 regulations provide a formal route for consumers who want to export surplus electricity.
A distribution or retail-supply licensee is required to enter into net-metering arrangements with eligible consumers, subject to the regulations.
The regulations also prescribe capacity limits.
For domestic consumers, the installed capacity cannot exceed 4 kilowatts for a single-phase supply and 10kW for a three-phase supply.
For commercial and industrial consumers, the capacity cannot exceed 1 megawatt and is also capped at the customer’s maximum load demand recorded in the 12 months before applying for net metering.
For a business planning a large rooftop solar investment, that requirement can become an important part of the project’s financial calculations.
What happens to surplus electricity under net metering?
Approved net-metering customers do not simply receive a cash payment for every unit of electricity they send to Kenya Power.
The regulations provide for an energy credit equivalent to 50 per cent of the electricity exported during a billing period.
If a customer exports 100kWh, for example, the customer receives a credit equivalent to 50kWh.
The credit is then used in calculating the customer’s electricity bill against energy supplied by the licensee. Any surplus credit can be carried forward, although unused credits are forfeited at the end of the licensee’s financial year.
That arrangement makes the timing of solar generation particularly important.
A home or business that consumes most of its electricity during daylight hours may use a large portion of its solar generation directly.
Another property that generates heavily during the day but consumes little electricity at that time could have more surplus power available for export.
Why this matters to homeowners
For a household, the biggest risk is assuming that installing solar automatically gives the owner permission to feed electricity into the Kenya Power network.
It does not.A homeowner considering a grid-connected solar installation should establish whether the inverter and other equipment can export electricity.
If the system is capable of exporting power, the owner should establish whether a net-metering agreement and the necessary approvals are required.
This is particularly important when purchasing hybrid inverters, because some systems can operate both with batteries and the national grid and may have configurations that allow electricity to flow back into the network.
The safest approach is therefore to establish the intended operating mode before installation, rather than discovering later that the system has been exporting electricity without the required approval.
Businesses could face a bigger financial headache
The issue is potentially more significant for businesses because commercial premises can install much larger solar systems.
Factories, hotels, supermarkets, offices, farms, schools and other enterprises are increasingly using solar power to reduce the amount of electricity they purchase from the grid.
For these customers, the objective is usually straightforward: generate electricity during the day, consume it on-site and reduce the monthly Kenya Power bill.
But a large solar system can also produce more electricity than a business needs at particular times.
That makes system design critical.
A business installing a 500kW solar system, for example, needs to understand its actual electricity consumption throughout the day rather than simply looking at its total monthly consumption.
The same monthly electricity usage can produce very different solar economics depending on whether the business consumes most of its power during daylight hours or after sunset.
Where substantial surplus generation is expected, the business needs to establish how that electricity will be managed and whether the installation qualifies for an approved net-metering arrangement.
Kenya Power can disconnect systems that threaten the network
The regulations give the electricity licensee powers to disconnect a net-metering system where its output violates the applicable grid code.
More seriously, the licensee may disconnect a net-metering system or the electricity supply without prior notice if continued operation would jeopardise the safety, reliability or security of the distribution system, or create an imminent physical threat to people or property.
That provision explains why the issue goes beyond billing.
Electricity networks must maintain appropriate voltage, frequency and protection levels. A poorly designed or unauthorised generation system can complicate those controls.
The regulations consequently require generation systems participating in net metering to be properly installed, operated and inspected or tested by an authorised person.
Why Kenya is tightening attention on solar exports
The development comes as Kenya’s electricity system absorbs increasing amounts of variable renewable energy.
Solar and wind generation can fluctuate depending on weather conditions and the time of day.
When a large amount of generation suddenly rises or falls, the rest of the electricity system has to respond to maintain balance.
For Kenya Power, this makes visibility and control of electricity flowing through the distribution network increasingly important as customer-owned generation expands.
EPRA, which regulates Kenya’s electricity and renewable-energy sectors, lists technical and economic regulation of electricity among its responsibilities.
The regulator currently lists the Energy (Net-Metering) Regulations, 2024, Legal Notice No. 104 of 2024, among Kenya’s electricity-sector regulations.
