Commercial rooftop PV projects usually aim to increase self-consumption and reduce daytime electricity cost. Oversizing can cause low consumption and a longer payback period.
Recommended evaluation method
- Compare daytime load on weekdays and weekends.
- Confirm whether surplus power can be exported and how it is settled.
- Estimate whether EV chargers, storage or new production equipment will be added.
A practical plan often starts with stable self-consumption, then expands according to tariff, storage and charging needs.