If you want to connect your solar panels with your utility meter you can’t produce more than 120% of your annual demand. If you install a system that produces more than 120% of your annual demand that is illegal to connect it with your utility meter according to Pakistan’s policy. IF you are producing more and want to connect it with you meter first your have to notify the government authorities about it and you will be considered as IPP (independent power producers). They will deal you accordingly.
This solar calculator calculates 120% of your annual energy demand and gives you exact size of PV system and exact number of solar panels that you can install. Helps you avoid doing any illegal connection during net-metering .
Net metering is a billing mechanism that credits solar energy system owners for the electricity they add to the grid. For example, if a residential customer has a PV system on their roof, it may generate more electricity than the home uses during daylight hours.
Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly important with renewable energy sources like wind and solar, which are non-dispatchable (when not coupled to storage). Monthly net metering allows consumers to use solar power generated during the day at night, or wind from a windy day later in the month. Annual net metering rolls over a net kilowatt-hour (kWh) credit to the following month, allowing solar power that was generated in July to be used in December, or wind power from March in August.