Solar ATAP Calculator 2026: Cost, Export Credits, Savings and Payback

Progressture Solar
12 minutes ago
4 min read

By: Progressture Solar | Last verified: 29 July 2026

A Solar ATAP calculation has two different values: solar you use immediately reduces the electricity you import, while surplus exported to TNB earns a domestic bill credit at the applicable Energy Charge only. Under the current Solar ATAP guideline, unused export credit does not roll to the next bill, cannot offset AFA, and the Solar ATAP contract runs for 10 years. That makes daytime usage and sensible system sizing central to payback—not just panel size.

Last verified: 29 July 2026

What does Solar ATAP pay for exported solar electricity?

Customer type • Value of exported surplus • Important limit

Domestic • Applicable Energy Charge • Used only in the same billing period; cannot offset AFA

Non-domestic • Previous month’s average SMP (7am–7pm) • Used only in the same billing period; rate changes monthly

For a domestic general-tariff customer consuming 1,500 kWh or less monthly, TNB lists an Energy Charge of 27.03 sen/kWh. If consumption is above 1,500 kWh, the listed Energy Charge is 37.03 sen/kWh. Those are energy-charge figures—not a promise that every solar kWh has the same monetary value.

Key fact: domestic exported energy is not credited against capacity, network or AFA charges. Solar used behind the meter can reduce imported kWh, so its bill effect can differ from the export-credit rate.

Solar ATAP calculator: a transparent way to estimate annual savings

Use your installer’s forecasted annual generation and your own daytime load data. Do not treat an online calculator’s generation estimate as a site guarantee.

Input • Symbol • Where to get it

Forecast annual solar generation (kWh/year) • G • Proposal / site assessment

Share used while generated • S • Interval data or a conservative load estimate

Imported-kWh value avoided (RM/kWh) • I • Your tariff components; exclude or separately model variable AFA

Export-credit rate (RM/kWh) • E • Domestic Energy Charge; businesses: live Average SMP

Installed cost (RM) • C • Like-for-like written quotes

Confirmed rebate (RM) • R • Eligible SuRIA Home applicant only

Annual solar bill benefit ≈ (G × S × I) + [G × (1 − S) × E]

Simple payback (years) ≈ (C − R) ÷ annual solar bill benefit

This is a screening calculation. It excludes financing interest, maintenance, inverter replacement, roof work, future tariff/AFA changes, degradation, tax treatment, meter/connection costs and any charges not reduced on your bill.

Worked home example: show the assumptions, not a guaranteed result

Scenario only—not a customer result or savings promise. Assume a 5 kWac system forecasts 6,000 kWh/year; 70% is self-consumed; the household is on Domestic General tariff at 1,500 kWh/month or less; and AFA is excluded because it changes monthly.

Calculation • Value

Self-consumed solar • 4,200 kWh/year

Exported solar • 1,800 kWh/year

Assumed import value avoided: 27.03 + 4.55 + 12.85 sen/kWh • RM0.4443/kWh

Domestic export credit at Energy Charge • RM0.2703/kWh

Estimated annual bill benefit • RM2,352.60

Calculation: (4,200 × RM0.4443) + (1,800 × RM0.2703) = RM2,352.60.

If a homeowner receives written quotes of RM15,000–RM25,000 for a comparable 5 kW system, a simple, pre-finance payback at these assumptions is roughly 6.4–10.6 years. A confirmed RM3,000 SuRIA Home rebate would reduce the illustrative net outlay to RM12,000–RM22,000 and the simple-payback range to roughly 5.1–9.4 years. The quoted RM15,000–RM25,000 market range is a non-official market indication only; obtain current itemised proposals.

Why daytime self-consumption matters more under Solar ATAP

1. A self-consumed kWh can reduce the imported kWh on which applicable tariff components are charged.

2. A domestic exported kWh receives only the Energy Charge as a credit.

3. Any unused export credit is forfeited at the end of that billing period—there is no rollover.

4. Oversizing a system may increase midday export without increasing the usable bill benefit.

Useful load-shifting questions: Can air-conditioning, EV charging, pool pumps, laundry, refrigeration, office equipment or production loads operate when the system is generating? A battery may improve self-consumption but needs a separate economics calculation.

What Solar ATAP capacity can you install?

Applicant • Published maximum

Domestic, single phase • 5 kW

Domestic, three phase • 15 kW

Non-domestic • Up to 100% of maximum demand, subject to assessment and capped at 1,000 kW

A domestic application above 5 kW (single phase) or 15 kW (three phase) triggers a Connection Confirmation Check listed by SEDA/TNB at RM1,000. A technical assessment is a prerequisite where required; do not assume every roof or supply can take the desired capacity.

Before relying on a payback quote

• Ask for the forecast generation, self-consumption assumption and export assumption separately.

• Match proposals on kWac, panel/inverter brands, warranty, roof scope, monitoring, applications, meter work and exclusions.

• Check the provider in SEDA’s RPVSP directory.

• Use your actual bills and daytime pattern—not only average monthly spend.

• If you may qualify for SuRIA Home, confirm eligibility and commissioning timing before counting its value.

Sources and claim-verdict / staleness notes

Claim • Verdict at 29 Jul 2026 • Source / publication control

Solar ATAP began 1 Jan 2026; domestic export credit is the applicable Energy Charge; no rollover; no AFA offset; 10-year period • ✅ Verified • Energy Commission/SEDA Solar ATAP guideline: https://www.seda.gov.my/reportal/wp-content/uploads/2025/12/GUIDELINES-FOR-SOLAR-ACCELERATED.pdf

Domestic Energy Charge is 27.03 sen/kWh at ≤1,500 kWh/month and 37.03 sen/kWh above; capacity 4.55 and network 12.85 sen/kWh • ✅ Verified for current RP4 tariff page • TNB tariff page: https://www.mytnb.com.my/business/understand-your-bill — re-check on publication; AFA is monthly

Business export credit is Average SMP and changes monthly • ✅ Mechanism verified; ⚠️ do not hard-code a price • ATAP guideline: https://www.seda.gov.my/reportal/wp-content/uploads/2025/12/GUIDELINES-FOR-SOLAR-ACCELERATED.pdf; Single Buyer SMP page: https://www.singlebuyer.com.my/market/market-data/system-marginal-price

RM15,000–RM25,000 5 kW market range • ⚠️ Non-official market indication, not independently benchmarked or price-guaranteed • Market reference: https://solaratap.com.my/ — replace with current Progressture written-quote range before publishing

Worked-result savings / payback • ✅ Arithmetic checked; ⚠️ scenario only • Inputs and formula displayed above; not a forecast