Use Solar While It Shines: A Daytime Self-Consumption Plan
Solar gives its clearest value when the property uses the energy while it is being generated. Moving suitable flexible loads into daylight hours can reduce grid imports directly, but the plan must respect appliance safety, household routines and the property’s electrical capacity.
Identify fixed and flexible loads
Refrigeration, security systems and essential equipment are fixed loads. Washing machines, dishwashers, pool pumps, water heating and some EV charging are more flexible. List when each load normally runs and whether it can be moved safely between late morning and early afternoon.
Do not switch everything on together
A timer does not create extra solar. Starting several high-power appliances together can create a short demand peak above solar output, so TNB import may still occur. Stagger flexible loads and keep manufacturer instructions, circuit ratings and daily needs in mind.
Coordinate solar with Time of Use carefully
TNB’s published Time of Use schedule places off-peak hours from 10pm to 2pm on weekdays, peak from 2pm to 10pm on weekdays, and all day off-peak on weekends for eligible smart-meter customers. Solar output is usually stronger during part of the weekday off-peak window. The best schedule therefore depends on both the avoided tariff and available solar, not on one rule alone.
A practical seven-day exercise
- Record the main loads and their start times for one week.
- Mark which loads can move without affecting comfort or safety.
- Check the inverter monitoring curve for strong solar hours.
- Move one load at a time and review TNB import, rather than relying only on total solar generation.
If the home is empty during the day, a smaller system, controlled EV charging or a separately modelled battery may be more sensible than simply adding panels. See the Normal versus Time of Use guide before changing tariff or appliance schedules.
Frequently asked questions
Which appliances are easiest to move into solar hours?
Laundry, dishwashing, pool pumps, water heating and some EV charging are common candidates when their circuits and manufacturer instructions allow it.
Should every appliance run at noon?
No. Stagger high-power loads to avoid creating a demand peak above solar output or circuit capacity.
Does Time of Use always increase solar savings?
Not automatically. It depends on eligibility, tariff periods, solar production and the household load profile.
This article reflects official information checked on 1 August 2026 and is general guidance. Programme rules, tariff treatment, approval and actual savings remain subject to the latest PETRA, SEDA, Energy Commission and TNB requirements plus the property bill, roof and usage pattern.
Official sources
Want HOMI to review your TNB bill?
Send your usage pattern and HOMI can estimate whether Solar ATAP makes sense for your home or business.
Review My Usage Pattern