Net Billing links solar generation, on-site consumption and the financial treatment of electricity exported to the grid. The starting point is not simply annual generation: it is how much generation can serve your loads at the time it occurs. This guide explains the design method; current connection and contract terms must be checked for each application.
Three energy flows
- Direct self-consumption supplies loads operating while the array is generating.
- Export sends surplus to the grid where the connection conditions permit it.
- Import supplies demand that solar generation cannot meet.
Storage adds a route from generation to later consumption, with conversion losses and power limits. A battery does not produce energy, and installing PV does not automatically remove every line of the electricity bill.
How this differs from Net Metering
Under Net Billing, exported electricity must be valued separately from purchased electricity. Do not assume an exported kWh financially cancels an imported kWh at another time. The Net Metering labels on our historical project records describe those installations; they are not a statement that the same scheme is currently open to new applicants.
A worked timing example
In a hypothetical one-hour interval, 8 kWh of generation and 5 kWh of demand allow up to 5 kWh of direct use and leave 3 kWh surplus, without storage or curtailment. Moving the load to evening can leave annual consumption unchanged while reducing direct self-consumption. Timing is the key difference.
This is an energy-balance example, not a meter-settlement simulation or a bill prediction. A real model uses the available measurement intervals and applicable settlement rules. Two properties with identical annual bills can therefore require different system sizes.
Data required before a proposal
| Input | Design purpose |
|---|---|
| Bills and interval consumption data | Annual demand and operating profile |
| Supply type and agreed capacity | Electrical infrastructure assessment |
| Roof plan, shading and use rights | Layout and documentation |
| Storage and backup objectives | Architecture and critical-load selection |
Keep future loads separate from measured demand. For example, an electric vehicle or heat pump should be added with an explicit schedule, not a percentage uplift without explanation.
Connection checks and practical next steps
The self-consumption framework was updated by decision YPEN/DAPEEK/102876/1958, Government Gazette B 5573/14 September 2026. Read HEDNO's application instructions alongside the Ministry's updated legislation index. The 2024 announcement alone is insufficient for a new application. Confirm current documents, connection capacity and contracts for the particular supply before ordering equipment.
Explore our Net Billing service, battery storage design and the published Anissaras solar and storage installation. The latter is a storage reference, not a claim of a newly completed Net Billing project.
How to read a Net Billing proposal
Ask for separate estimates of generation, direct self-consumption, potential export and grid imports. If storage is proposed, also request the energy charged, energy delivered and conversion losses. This separates value arising from a real match between solar output and demand from value dependent on financial terms that may change.
- Ask for the time resolution of consumption data and the shading and operating-loss assumptions.
- Check whether technical performance and monetary projections are presented separately.
- Confirm the current application process and contractual terms against official sources before signing.
Discuss your installation
Send your location, bills, operating hours and available roof space for an individual assessment.
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