Grid-tied Rooftop Solar Power System with Net-Metering

What is On-Grid System (Grid-Tie)?

An On Grid solar system or a rooftop solar PV system converts the solar DC power to AC power and supply it directly to your household loads. In case when solar PV system is producing more energy than your household needs, it exports the excess energy to your electricity company grid via NET METER. Also, if your solar PV system is producing less energy than your household needs, you get the difference from your local electricity company. The Net Meter allows you to record the export & import energy data. Any excess energy produced by your system and exported to the grid, will be adjusted in your next electricity bill.

These systems are best suited for areas where there are no power cuts. Also, since On Grid PV systems do not have batteries, they are robust and easy to maintain.

You can get answers to all your queries here – FAQ’s

Why Free Spirits Green Labs is best for your Solar Rooftop Installation

Free Consultation

We help you design the best system as per you need

Improved Performance

Run the system with up to 30% enhanced performance

On-Time Installation

Minimum time to procure & install your solar system

24x7 Service

Save every unit energy that might go waste due to delayed maintenance


5 Years Warranty

Systems covered under 5 years manufacturer warranty

Proactive O&M

Get proactive support from our staff  to keep your system going

Approved Subsidy

Get up to 30% upfront subsidy and reduce investment

Referral Bonus

Get INR 2000 for every successful referral

Get all Quality Components

Solar Panels

  • World class solar panels with highest efficiency. We use brands like Vikram, Waaree, Canadian Solar, GoldiGreen
  • Excellent module efficiency up to 15.6%
  • Higher PV energy yields even under low light and cloudy conditions

Warranty – 10 years product warranty @1% degradation each year. 25 years performance guarantee (90% up to 10 years, 75% up to 25 years)

Grid Tie Inverter

  • World class grid tie inverter of ABB, Zever, Delta, Growatt etc. with IP65 protection
  • Low maintenance, long lifespan with seamless working
  • Maximum inverter efficiency up to 99.5%

Warranty – 5 to 10 years

Tier 1 solar panels module Vikram waaree Goldi Green Canadian Solar with remote monitoring services of trackso via rs484 and rs232 port
inverters of schneider SMA ABB Growatt Delta zeversolar with remote monitoring services of trackso via rs484 and rs232 port

Maximising your Solar System Performance

We gather all the relevant information from all our installation sites and use it to remotely monitor and control our system to maximize the system performance

Real time diagnosis of maintenance issues

Switch ON/OFF equipment remotely during energency

Get Email/SMS Alerts for specific rules triggered

Get regular performance reports on your phone

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Why should I use rooftop solar PV system?
  • The cheapest and most reliable solar PV system which leads to minimal maintenance and recurring cost.
  • Generates almost as much as your daily energy needs without being able to store it in batteries.
  • Excess energy produced in any day can be fed to the electricity grid and will be adjusted in the next month bill.
  • Fastest RoI. Hence, you get back all your invested money in around 6 years and then produce free electricity for next 20 years.

What are the prerequisites to install a rooftop solar PV system?
  • Shadow free, south facing area on your rooftop since even a small amount of shadow can have adverse effect on energy generation from the whole string of solar panels.
  • Approx 8 – 10 m2 area to install 1 kWp solar system system.
  • Distance between the solar panel setup and the grid tie inverter should not be more than 20 meters in ideal case. More than that can lead to DC losses.
  • Clean and well ventilated indoor space to install the grid tie solar inverter and protection equipment.

Are there any limitations from the government to install the rooftop solar PV system?
  • Government is encouraging the installation of grid ties rooftop solar PV systems. It is providing up to 30% subsidy and additional incentives for energy generation. The subsidy amount and incentives vary from state to state, though.
  • The maximum limit to install a rooftop solar PV system is defined by the government (MNRE).

What are the various components of a rooftop solar PV system?
  • Solar PV panels
  • Grid tie inverter
  • Mounting structure suitable for your rooftop. Somewhere ground mounting can be used whereas at other places elevated mounting is needed.
  • AC Juntion Box and DC Junction Box
  • Lightning Arrestor (as per requirements)
  • Earthing equipment
  • AC/DC Cable
  • Civil and Electrical job
  • Transportation and other misc. costs

How are the calculation done using the Net Meter?

The net meter captures both consumption as well as production data. It also stores the net import/export units and is used for necessary billing by the electricity company.

  • If you consumed more energy than you produced in a month, the electricity company will charge you for that energy.
  • If you produced more energy than you consumed in a month, the excess energy produced will be taken forward as credit in the next month and will be used to balance the next month’s consumption units.

What happens when there is a power failure at my house?

A grid tied rooftop solar PV system does not produce any energy if there is a power cut during the day time. The grid tie inverter shuts down as a mandate in order to avoid any casualty that might happen during maintenance work of the grid. Hence, this type of system is suitable for places where power cuts are rare and happens during non sunlight hours.