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Solar System


   Grid-Tied Solar Systems

     Grid-tied, on-grid, utility-interactive, grid intertie and grid back feeding are all terms used to describe the same concept – a solar system that is connected to the utility power grid.


   Off-Grid Solar Systems

     An off-grid solar system (off-the-grid, standalone) is the obvious alternative to one that is grid-tied. For homeowners that have access to the grid, off-grid solar systems are usually out of question. Here`s why: To ensure access to electricity at all times, off-grid solar systems require battery storage and a backup generator (if you live off-the-grid). On top of this, a battery bank typically needs to be replaced after 10 years. Batteries are complicated, expensive and decrease overall system efficiency.


   Hybrid Solar Systems

     Hybrid solar systems combine the best from grid-tied and off-grid solar systems. These systems can either be described as off-grid solar with utility backup power, or grid-tied solar with extra battery storage.

Advantages of Grid-Tied solar Systems

  1. Save more money with net metering
  2. A grid-connection will allow you to save more money with solar panels through better efficiency rates, net metering, plus lower equipment and installation costs: Your solar panels will often generate more electricity than what you are capable of consuming. With net metering, homeowners can put this excess electricity onto the utility grid instead of storing it themselves with batteries.

  3. The utility grid is a virtual battery
  4. Electricity has to be spent in real time. However, it can be temporarily stored as other forms of energy (e.g. chemical energy in batteries). Energy storage typically comes with significant losses. The electric power grid is in many ways also a battery, without the need for maintenance or replacements, and with much better efficiency rates. In other words, more electricity (and more money) goes to waste with conventional battery systems.

Advantages of Off-Grid solar Systems

  1. No access to the utility grid
  2. Off-grid solar systems can be cheaper than extending power lines in certain remote areas.

  3. Become energy self-sufficient
  4. Living off the grid and being self-sufficient feels good. For some people, this feeling is worth more than saving money. Energy self-sufficiency is also a form of security. Power failures on the utility grid do not affect off-grid solar systems.

Equipment for Off-Grid Solar Systems

Typical off-grid solar systems require the following extra components:

  • Solar Charge Controller
  • Battery Bank
  • DC Disconnect (additional)
  • Off-Grid Inverter
  • Backup Generator (optional)

Advantages of Hybrid Solar Systems

  1. Less expensive than off-gird solar systems
  2. Smart solar holds a lot of promise

Equipment for Hybrid Solar Systems

Typical hybrid solar systems are based on the following additional components:

  • Charge Controller
  • Battery Bank
  • DC Disconnect (additional)
  • Battery-Based Grid-Tie Inverter
  • Power Meter

Net Metering

Net metering is a billing system that allows rooftop owners having solar system installed at their rooftop to sell any excess electricity generated from solar system to local electricity utility.

  • Capacity
  • Up to 1 MWp and Above

  • Conditions
  • 100% of your Sanctioned Load Cumulative capacity of all solar systems installed in your area shall not exceed 40% of distribution transformer capacity in your area.

  • Ownership options
  • Self ownership (CAPEX model) Third party ownership (RESCO model) Billing Mechanism Annual (April to March Any unadjusted electricity credits shall be paid as per the rates notified by RERC from time to time.