Do Hybrid Solar Systems Help During Power Outages | Explained
Current Cessation: Without gate signals, the system becomes independent from the grid, allowing neither inflow nor outflow of current.
Das Energie Private Limited 
Solar systems do not power the house during power cuts on their own. While on-grid solar systems shut down completely, hybrid solar panels keep the lights on when the grid fails.
Hybrid solar systems switch from the grid to battery power by implementing an anti-island mandate and making your house grid-independent.
Additionally, it enables drawing power from the batteries through solid-state switches that match parameters and connect to the emergency power.
How The Hybrid Solar System Helps During Power Outages
The hybrid solar system is connected to the grid system and the battery. During grid failures, the hybrid system’s sensors switch to an alternative power source such as the lithium battery to keep the house running. Here is how a hybrid solar system helps during power outages:
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By Implementing Anti-Islanding Mandate
The primary function of the solar inverter in the hybrid system is to detect the grid. Once the grid fails, it detects the outage and stops sending electricity back into the system.
Such a phenomenon is called the anti-islanding mandate, and it is required by law. Here are a few reasons why such a mandate exists:
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Line Workers' Safety: When the grid fails, line workers rush to fix the electrical lines. If your system still sends power down those lines, line workers can get electrocuted.
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Equipment Protection: This mandate protects equipment during major outages when the grid reference is lost. Sending power down the lines can prove fatal for equipment health.
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Grid Stability: The hybrid prevents power interference from returning power to the grid through this mandate. Therefore, the grid remains stable without being short-circuited.
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By Making the System Grid-Independent
One way a hybrid solar system helps during power outages is by making the house independent from the grid. This process turns the house into a powerplant of its own. The disconnect happens within microseconds through the following steps:
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Voltage Sensing: The microprocessors within the hybrid solar system detect voltage fluctuations by monitoring the utility grid’s waveform thousands of times per second.
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Grid Loss Detection: The moment the grid voltage drops abnormally, the control chip detects a fault in microseconds.
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Solid-State Gate Triggering: Instead of a slow mechanical relay, the hybrid system’s control board cuts gate signals to the internal transistors.
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Current Cessation: Without gate signals, the system becomes independent from the grid, allowing neither inflow nor outflow of current.
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Bess Transfer: As the system fulfills its anti-island mandate, solid-state switches shift mode using an Automatic Transfer Switch (ATS), self-containing your solar grid.
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By Safely Switching to the Alternative Battery System
Safely and seamlessly switching power sources during a power outage is one of the significant benefits of a hybrid solar system. The safe switch is necessary to prevent equipment damage. The process by which it happens is as follows:
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Handshake Communication: The inverter requests safety information and ID from the Battery Management System (BMS).
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BMS Closure: Once the ID and parameters match, the relay shuts down, and the power flows from the battery to the system.
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Real-time Adjustment: The Internal phase-locked loop (PLL) evaluates the currents and adjusts to mimic the grid.
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Seamless Tie-in: Solid-state switches shift to back-up mode to draw power from the battery until the grid comes back online.
How to Manage Loads in a Hybrid Solar System
The best way to manage loads in a hybrid solar power system is to separate the different appliances into essential and high-consumption categories. Connect these two categories of appliances to different load panels.
The Critical Load Panel (For Essential Appliances)
Connect the essential appliances to the critical load panel, which is the island port of the hybrid inverter, suggests expert commercial solar panel installation service. Thus, you can keep operating those appliances during outages. Some examples of the appliances include:
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Wi-Fi routers and Server racks
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Security Systems
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Refrigerators or Medical Equipment
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Lights, Fans, kitchen equipment
The Non-critical Load Panel (For High-consumption)
This panel directly connects to the main grid. Consequently, the appliances connected to this panel will lose power immediately. Some examples of appliances that should be connected to this panel are:
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Centralised HVAC Systems and Heaters
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Centralised Air Conditioning
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EV Charging Docks
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Outdoor Lighting and Pool Filtration System
Final Words
Hybrid solar systems are beneficial for seamlessly switching between solar and battery power if the grid system fails. They protect equipment and keep appliances running in the household or commercial centers.
However, this system is complicated to install and understand. Taking aid from a solar installation service such as Das Energie Private Limited enables you to make an informed decision and configure your system to your needs. Visit their official website for more information.
