Off Grid Solar System For Home: Prices, Subsidy, ROI & Working

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About The SUNplugged

SUNplugged was born from a passion to reduce pollution and promote the mass adoption of solar energy. Founded in 2015 by two environmentally-conscious IIT Bombay alumni, SUNplugged started as a two-member team and has grown to become the third-largest EPC contractor for residential installations in India. We have successfully helped over 6000 homes switch to solar, enabling our customers to save up to 90% on their monthly electricity bills. We specialize in both on-grid and hybrid solar systems, with plans to offer off-grid solar systems in the near future.
  • Free Solar Consultation: We provide expert advice to help you make informed decisions about your solar energy needs.
  • Premium-Quality Mounting Structures: Our prefabricated mounting structures are resilient and durable, capable of withstanding cyclonic wind speeds up to 150 kmph.
  • Easy Loan Approval: We offer quick, 10-minute loan approvals to make solar energy accessible and affordable.
  • Flexible EMI Schemes: We offer various EMI options, including zero-cost EMI, making solar installations financially convenient.
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Overview of Off-Grid Solar Systems

An off-grid solar system is also known as a stand alone solar system. Why? Because it’s not connected to the grid. It works as an isolated island of its own. An off grid solar power plant is an intricate setup of the following components.

Off grid solar components and their working :
Solar panels
Solar panels are made up of solar cells. When they’re made of one single silicon crystal, the resulting panel is monocrystalline. When they’re made of multiple silicon crystals, the resulting panel is polycrystalline (multicrystalline).
Solar inverter
The power from solar panels is in the form of direct current. Home appliances run on AC power. This is where the solar inverter comes into the picture. It converts DC power into AC power. An off grid solar inverter, just like an on-grid inverter, is the heart of the solar system.
Batteries
Off grid solar functions on batteries. During the sunshine hours, the electricity that the panels are producing is used to run the house. Whatever is extra is used to charge the batteries. That same power from the battery is then used to keep the house running at night.
Charge controller
The charge controller in off grid solar controls the charge. It’s in parallel with the solar inverter. The panels produce electricity that goes into the charge controller. It’s the charge control that feeds power into the inverter as well as uses the extra units to charge the batteries.
Mounting structures
You have the panels and the inverter, but without proper mounting structures, the system cannot be set up. The mounting structures should be at a proper tilt angle (near perpendicular to the sun for as long as possible) so that they receive maximum sunlight.

The working of an on-grid solar system for home

  • Off grid solar panels absorb and trap sunlight, converting it into direct current (DC)
  • The DC current goes into a combiner box
  • From the combiner box, it goes into the solar charge controller
  • The charge controller gives current to the batteries and charges them
  • The charge controller also communicates with the off grid solar inverter
  • The off grid inverter converts DC power into AC power
  • Most off grid solar inverters nowadays have built-in battery management systems
  • The solar inverter finally passes the AC current to run household appliances

Off grid solar system with different capacities

Capacity Units generated / day Units generated / year
1 kW off grid solar power system 4 units on average 1440 units on average
2 kW off grid solar power system 8 units on average 2880 units on average
3 kW off grid solar power system 12 units on average 4320 units on average
4 kW off grid solar power system 16 units on average 5760 units on average
5 kW off grid solar power system 20 units on average 7200 units on average
10 kW off grid solar power system 40 units on average 14400 units on average

Why Choose The SUNplugged for Your Solar Installation?

Q1
1. What is an off-grid solar system?
An off grid solar system is also known as a stand alone solar system. It works independently from the grid. Solar panels turn sunlight into electricity and a charge controller distributes that electricity to run household appliances during the sunshine hours and simultaneously charges the batteries when there’s extra power. The stored energy in the batteries is then used to keep the house running at night.
Q2
2. What is the drawback of off-grid system in solar electric power?
Its cost is its major drawback. The off grid solar system price with batteries is between ₹85-100/ watt peak. And the installation cost breaks even in about 6-7 years.
Q3
3. How does an off-grid solar system work?
  • Off grid solar panels absorb and trap sunlight, converting it into direct current (DC)
  • The DC current goes into a combiner box
  • From the combiner box, it goes into the solar charge controller
  • The charge controller gives current to the batteries and charges them
  • The charge controller also communicates with the off grid solar inverter
  • The off grid inverter converts DC power into AC power
  • Most off grid solar inverters nowadays have built-in battery management systems
  • Finally, the solar inverter passes the AC current to the load
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