In today’s blog post, we will discuss the difference between grid-tied solar inverters and hybrid solar inverters and why it is important for our community members. Why are grid-tied systems creating problems with load shedding? Benefits of on-grid system and when to use hybrid solutions. We will also help you to find out whether you should go for a grid-tied setup or not. Furthermore, we will talk about energy prioritization, make a quick price analysis, and give some specific recommendations related to the ongoing energy crisis in Pakistan as of 2024.
The drawback of Grid-Tied Solar System
In the past, on-grid systems were fine in areas like Bahria Town where load shedding occurred for only a few hours daily. But now, a sudden increase in power outage caught many people off guard. Since on-grid systems are connected to the Wapda grid and are mostly used to reduce electricity bills so when the grid goes down, the system shuts off, leaving you without power even if the sun is shining.
Bahria Town Load shedding
Grid-tight systems work best in places where load shedding is very low. For example, in Bahria Town, load shedding used to be occasional, but now it happens daily. In such places, grid-tied systems solar systems do not work properly. If load shedding occurs one or two hours a day in your area, then you can use a grid-tied system. Otherwise, you should install a hybrid system.
Benefits of On-Grid System
On-grid systems are known for their affordability, longer inverter life, and maintenance-free operations. These systems are perfect for areas with less load shedding as its a one-time investment with a clear return on investment which makes it a practical choice for many people.
Grid-Tied System Feasibility
The grid-tied system can be feasible if the load shedding is frequent in your area. Knowing the limitations of a grid-tied system and analyzing the local power scenario is important to make an informed decision when investing in a grid-tied solar system otherwise hybrid solar system is better.
How to Choose between Hybrid and On-Grid
The decision to opt for a hybrid or an on-grid system depends on the frequency of load shedding in your area. If there is minimal load shedding in your area then definitely go for an on-grid system, it requires almost no maintenance and gives the best return on investment.
But if you are facing too much load shedding especially 8 to 10 hours a day than in that case, go with the hybrid system because hybrids will provide continuous power backup during outages.
Here’s a simplified pros and cons table for clarity:
Pros and Cons of On-Grid Systems:
Pros
- Cost-Effective: On-grid systems are generally more affordable to install.
- Low Maintenance: These systems require almost no maintenance, contributing to cost savings.
- Best Return on Investment: With less maintenance costs, on-grid systems offer an excellent return on investment.
Cons
- Dependence on Grid: Power interruptions in the grid affect system performance, limiting reliability.
- Limited Use During Load Shedding: On-grid systems shut down during load shedding, providing no power backup.
Pros and Cons of Hybrid Systems:
Pros
- Uninterrupted Power: Hybrid systems continue to supply power during load shedding, ensuring uninterrupted electricity.
- Adaptability: Suited for areas with frequent power cuts, making them versatile and reliable.
- Energy Storage: Integrated battery storage allows for energy storage during peak sunlight hours for later use.
Cons
- Higher Initial Cost: Hybrid systems tend to have a higher upfront cost due to additional components like batteries.
- Moderate Maintenance: While more robust than on-grid systems, hybrids may require occasional maintenance.
| Criteria | On-Grid System | Hybrid System |
|---|---|---|
| Load Shedding | Minimal or No Impact | Uninterrupted Power |
| Maintenance | Almost None | Moderate |
| Return on Investment | Excellent | Good |
| Reliability During Load Shedding | Limited | High |
Who should get a Hybrid System?
A hybrid system is a good choice for those who want power backup and don’t want any interruption during load shedding. The article explains the scenarios in which a hybrid system will be a smart investment for people and they can fulfill their energy needs.
Biggest Problem with Pakistani Grid:
The continuous shutdowns and voltage fluctuation in the Pakistani power grid from 180 to 380 volts are a big issue for solar systems. In such conditions, inverters can get damaged which can significantly reduce the efficiency and life span of solar systems. Sometimes the voltage level goes out of range which is very harmful to the sensitive equipment in the solar system.
In these situations, we need robust and adaptive solutions like hybrid systems with over and under-voltage controllers. These systems help us to manage grid conditions smartly and give more stable and reliable performance, which will be very essential for the successful integration and sustainability of solar initiatives in Pakistan.
Why do We think the Hybrid System is better for most Pakistanis?
In a country like Pakistan, where many areas are facing 12 to 14 hours of load shedding daily, we are confident that hybrid systems are the best solution. On-grid systems, which are generally installed to reduce electricity bills, lose their value during prolonged load shedding because of no light even if the sun is shining at its peak. These systems become useless when residents need them the most.
Hybrid solar systems switch from solar to battery and battery to solar off-grid connectivity enabling continuous power supply during an outage. The compatibility with the tough Pakistani grid makes hybrid systems a more feasible and reliable option for most of the consumer’s energy requirements.