Metering Solar Power to Your Convenience

on grid off grid solar power system

The story of On Grid Off Grid Solar Power System.

When people try and get acquainted with solar photovoltaic energy and its benefits, there are some basic queries that come up in the mind. Most important are the following two questions:

  1. What will happen to the excess electricity produced during the day ?
  2. What if, due to some reason, no electricity is produced during the day?

The answer to these questions is easy once we understand some of the crucial facts about Solar Power. Solar Power systems can be categorized into two parts:

  1. Off Grid Solar Power System
  2. On Grid Solar Power System

Off Grid Solar Power System –

An Off-Grid Solar power system or standalone photovoltaic system is when your system is not connected to the utility grid and you are producing your own electricity using solar energy. These systems generally use a battery bank to store the electricity for use when needed.

Benefits of using such system are:

  • Makes you completely independent from external energy supplies.
  • Reduces your expenditure.
  • Saves you from outrageous grid connection charges.

On Grid Solar Power System –

An On-Grid Solar Power System or grid-connected PV power system is an electricity generating system that is connected to the utility grid. When connected to the utility it helps in case of shortage, or no  generation of electricity. However, if the electricity produced is in excess as compared to the requirement at the moment, the excess energy can be sold back to the utility grid. This difference of energy can be tracked using a meter connected to your solar PV system. These systems generally use an inverter and one or two meters according to state utility rules.

The meters connected to the solar system can help you track the difference of energy used or sold back to the utility grid. There are two types of Metering:

  1. Gross Metering
  2. Net Metering

Gross Metering:

In gross metering, entire energy generated by the Solar energy System is fed back directly into the utility grid.  In this case, the benefit to the owner is based on feed-in tariffs proportional to the energy fed back to the grid.

Net metering:

Net Metering involves tracking the net energy between selling of the generated energy and buying of energy from utility supplier. This involves the usage of a single meter (or two meters, as per state rules) which has the facility to record both selling and buying of electricity. Under the net metering system, the excess energy generated by the solar energy system is sold back to the grid instead of being stored using a battery. However, when there is a deficit in the power generated by the system either during the night or on a cloudy day, power is drawn from the grid. On the basis of the amount of electricity drawn or sold back to the utility, the supplier decides whether to charge the user or give credit or pay the amount to the user. The incentive and charges vary from state to state.

Benefits of using such system are:

  • Financial Benefit to the owner of solar power.
  • No dependence on battery.

Watch this space for more – we’ll bring you all that you need to know about Net Metering and how it benefits you!



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