TNB Tariffs and Solar for Semi-D and Bungalow Homes
Decision details
In this guide
Use the bill and load, not the home label
A semi-D or bungalow does not necessarily have high daytime use. Start with billed kWh and period, loads operating in daylight, shading and account phase. Ask the provider to separate monthly generation assumptions from expected self-consumption.
For domestic Solar ATAP in Peninsular Malaysia, exports offset imports in the same billing period at the applicable Energy Charge. It is not cash, does not offset AFA, and unused credit does not roll into the next month. Monthly credits do not prove a zero bill; charges outside the eligible offset and night-time imports still matter.
Inverter capacity and the end of the term
Basic domestic ATAP inverter limits are 5 kW single-phase and 15 kW three-phase. They use inverter AC output (kWac), not total panel kWp. If a proposed system exceeds a threshold, the guideline requires a Connection Confirmation Check (CCC), including a RM1,000 fee. Utility review is not an automatic ban.
Solar ATAP took effect on 1 January 2026 with a maximum term of ten years from commencement. The recorded post-term arrangement is self-consumption only, with no offset or rollover for exported surplus. For an older NEM contract, do not assume the same terms; read the signed agreement and ask the programme provider. Get the capacity, fees, term and post-contract arrangement in writing.
Bill, export and capacity reference
| Item | Cited basis | Check for your home |
|---|---|---|
| Export credit | Offsets imports in the same period at Energy Charge; excludes AFA and unused balances expire [source] | Actual imports, exports and bill period |
| Capacity | Basic thresholds: 5 kWac single-phase and 15 kWac three-phase [source] [source] | Account phase and declared inverter output |
| Above threshold | Connection Confirmation Check applies; cited fee RM1,000 [source] | Provider's application and review responsibility |
| After programme term | Maximum ten years; cited post-term mode is self-consumption [source] | Older NEM contracts require their own documents |
Compare proposals against the bill that will actually be charged
Use the account’s actual tariff, billing days and import/export readings for each period; do not compare a proposal’s generic monthly estimate with a different month’s total. Ask the provider to show generation, self-use and export separately, then identify which bill components its calculation offsets and which remain. Under the cited ATAP rule, eligible exports offset the Energy Charge in the same period; they do not offset AFA and do not roll forward. Reconcile one past bill line by line against the model using that bill’s own readings. For two proposals, hold bill periods and household assumptions constant, and ask each provider to explain any difference in self-use, export or remaining charges. A semi-D label alone supplies none of these inputs.
Frequently asked questions
Does a larger home automatically suit solar?
No. Check kWh, daytime load, roof, shading and account phase. A semi-D or bungalow label alone does not establish savings or approved capacity.
How does ATAP credit domestic exports?
Exports offset imports in the same billing period at the applicable Energy Charge. Credit does not cover AFA, and unused balances expire at the end of the period.
What is the three-phase inverter limit and what if I exceed it?
The basic limit is 15 kWac for three-phase and 5 kWac for single-phase. Exceeding a threshold invokes CCC and a RM1,000 fee; it is not an automatic ban.