On-Grid / Off-Grid / Hybrid Solar
On-Grid, Off-Grid & Hybrid Solar Systems
Solar power systems can be configured as On-Grid, Off-Grid & Hybrid Solar Systems depending on grid availability, backup requirements, and energy usage patterns. Understanding these system types helps you choose the right solar solution for your home or business.
On-Grid Solar System
An on-grid solar system, also called a grid-tied system, connects directly to the main utility grid through a bi-directional (net) meter. This setup allows your home to use solar energy while staying connected to the grid for backup power and net metering benefits. It does not use battery storage. It generates solar power during the day to run your loads, and any excess electricity is exported to the grid through net metering.
✔ Ideal for locations with reliable grid power
✔ Lower system cost due to no batteries
✔ Net metering enables credit for excess energy
✔ Most common choice for residential rooftop solar and commercial rooftop solar systems.
Main Components of an On-Grid Solar System
- Solar Panels
Installed on rooftops facing south, these convert sunlight into direct current (DC) electricity. - Solar Inverter
Converts DC electricity from panels into alternating current (AC) electricity usable by household appliances and compatible with the grid. - Solar Module Mounting Structures
Support panels and must be durable to withstand strong winds and hold panel weight for up to 25 years. Typically made from galvanized steel to prevent rust and corrosion. - Solar Accessories
Includes AC/DC cables, DC and AC combiner boxes, earthing strips, and MC4 connectors for safe and efficient wiring and system protection. Bi-Directional (Net) Meter
Tracks electricity flowing to and from the grid. It records units exported to the grid and units imported, enabling net metering benefits where excess solar power reduces your electricity bill.
Key Benefits:
- Eligible for government subsidies under PM Surya Ghar Muft Bijali Yojana, ranging from Rs. 30,000 to Rs. 78,000 depending on system size.
- Cost varies by city (e.g., Noida, Delhi NCR) and depends on factors like DISCOM charges, panel type, inverter, mounting structure, and roof height.
- For detailed prices, pl. visit Solar Cost & Subsidy section. Prices are subject to change without notice.
👉For most commonly installed solar systems,
Check : 3kW solar system price in Noida and 5kW solar system price in Noida.
How It Works
- Solar panels absorb sunlight, generating DC electricity.
- The solar inverter converts DC to AC electricity matching grid voltage and frequency.
- The bi-directional meter measures power sent to and drawn from the grid.
- Your home appliances consume solar-generated AC power first, reducing grid electricity usage.
- Excess power is exported to the grid, earning credits.
- When solar production is insufficient, power imports from the grid seamlessly supply your home.
Government Subsidy
The Indian government provides a subsidy for installing Residential rooftop solar system both On-grid and Hybrid solar systems, uniform across the states, encouraging homeowners to adopt solar power and reduce electricity costs. This subsidy is available to residential buyers only. The subsidy applicable presently in U.P and Delhi states is :
| Solar System Size | Central Govt. Subsidy | UP State Govt. Subsidy | Dekhi State Govt. Subsidy | Total Solar Subsidy (UP) | Total Solar Subsidy (Delhi) |
|---|---|---|---|---|---|
| 1KW | ₹30,000 | ₹15,000 | ₹10,000 | ₹45,000 | ₹40,000 |
| 2KW | ₹60,000 | ₹30,000 | ₹20,000 | ₹90,000 | ₹80,000 |
| 3KW & Above Capacity | ₹78,000 | ₹30,000 | ₹30,000 | ₹1,08,000 | ₹1,08,000 |
Off-Grid Solar System
An off-grid solar system is a standalone power setup that functions independently from the utility grid. It provides electricity in places where grid access is unavailable, unreliable, or costly. Unlike grid-tied systems, off-grid systems rely solely on solar energy and battery storage to meet electricity needs, making them ideal for remote homes, cabins, farms, or areas prone to disasters.
✔ Suitable for areas with frequent power cuts or no grid access
✔ Provides complete energy independence
✔ Requires battery storage, increasing system cost
✔ Commonly used in remote or rural locations
Main Components of an Off-Grid Solar System
- Solar Panels – Convert sunlight into direct current (DC) electricity. The solar panels can be mono-crystalline, poly-crystalline, thin-film, bifacial, and Topcon. Solar panels are installed in the open areas on the rooftop, on ground and over water bodies for the maximum exposure to sunlight.
- Charge Controller – Manage and regulates voltage and current from the solar panels, to protect the batteries from over-charging and over-discharging. The commonly used charge controllers are MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation) type.
- Battery Storage – Stores excess energy for use during nighttime or cloudy weather. Commonly used battery types are Lead-Acid, Lithium-ion and Gel batteries.
- Inverter – Converts DC power from batteries to alternating current (AC) for household use.
- Backup Generator (Optional) – Provides power when solar energy is insufficient.
- Monitoring and Safety Systems – Optional tools to optimize and protect the system, such as Energy meters, Surge protection, and system monitoring. They help in optimizing the energy usage and maintaining the system health.
Key Benefits
- Energy independence from utility companies.
- Environmentally friendly by reducing fossil fuel use.
- Reliable power supply during outages.
- Long-term savings by eliminating electricity bills.
What You Need To Know
- An Off-grid solar system requires significantly higher investment for solar panels, batteries and inverter.
- Solar energy productions considerably varies with the availability of sunlight and hence requires careful planning to optimize the battery storage capacity.
- Need for careful energy management to measure daily consumption and manage the usage to avoid power shortages.
- The Off-grid solar system is expandable but additional components increases the cost and complexity.
Applications of an Off-Grid Solar System
Off-grid solar systems are used in residential, agricultural, healthcare, and industrial solar epc, particularly where grid access is limited. They also appeal to those seeking full energy independence or sustainable living.
Off-grid solar systems offer a self-sufficient, eco-friendly energy solution but require careful planning, sufficient battery capacity, and higher initial investment compared to grid-connected systems.
Hybrid Solar System
A hybrid solar system combines the benefits of both on-grid and off-grid systems. It is connected to the grid while also using batteries to provide backup power when required. It is a photovoltaic (PV) setup that integrates solar panels, a hybrid inverter, and a battery bank, while remaining connected to the electrical grid. Unlike traditional grid-tied systems, which automatically shut down during power outages to protect utility workers. Hybrid systems can store excess solar energy in batteries and supply electricity to your home even when the grid is down. This dual functionality provides both energy independence and grid reliability.
✔ Grid-connected with battery backup
✔ Ensures power availability during outages
✔ Higher flexibility compared to on-grid systems
✔ Suitable for users needing reliability and savings
Main Components of a Hybrid Solar System
- Solar Panels (PV Array): Solar panels absorb sunlight and generate direct current (DC) electricity through the photovoltaic effect. These are of different types like mono-crystalline (high efficiency, higher cost), poly-crystalline (moderate efficiency, lower cost), thin-film (flexible, lower efficiency), and building-integrated photovoltaic (BIPV) panels which are integrated into building materials.
- Charge Controller– Manage and regulates voltage and current from the solar panels, to protect the batteries from over-charging and over-discharging. The commonly used charge controllers are MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation) type.
- Battery Storage: Batteries (commonly lithium-ion) store surplus solar energy for use during nighttime, cloudy periods, or grid outages. A Battery Management System (BMS) monitors the voltage, temperature, and charge cycles to maximize battery lifespan and ensure safe operation.
- Hybrid Inverter: This device converts DC electricity from the panels and batteries into alternating current (AC) electricity suitable for home appliances. It also manages energy flow, switching seamlessly between solar power, battery storage, and grid electricity. Advanced inverters include Maximum Power Point Tracking (MPPT) technology to optimize energy harvest from the solar
- Grid Connection: The system remains connected to the grid, drawing power when solar and battery supplies are insufficient. Excess solar energy can be exported back to the grid, often credited via net metering programs, reducing overall electricity costs.
Key Benefits
- Continuous Power Supply: Maintains electricity during blackouts or grid instability.
- Cost Savings: Uses stored solar energy during high-rate periods to lower bills.
- Energy Independence: Reduces dependency on the grid while retaining backup access.
- Environmental Impact: Generates renewable energy, lowering carbon footprint and fossil fuel use
Applications of a Hybrid Solar System
- Regions with frequent power outages or unreliable grid supply.
- Households aiming to optimize energy costs with battery storage and smart energy management.
- Areas with high electricity rates or incentives for feeding excess solar power back to the grid.
A hybrid solar system offers the best of both worlds: the cost-effectiveness of grid-tied solar and the reliability of off-grid battery backup, making it a versatile solution for modern energy needs
Key Comparision of On-Grid, Off-Grid & Hybrid Solar System
| Features | On-Grid | Off-Grid | Hybrid |
|---|---|---|---|
| Grid Connection | Yes | No | Yes |
| Battery Backup | No | Yes | Yes |
| System Efficiency | > 95% | 70% - 80% | ~ 85% |
| System Cost | Low | Moderate | High |
| Best Use | Urban/residential with stable grid | Remote/rural areas | Areas with unreliable grid or need backup |
| Power During Blackout | No | Yes | Yes (via batteries) |
Need Help Choosing the Right Solar System?
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