How To Convert On Grid Solar To Off Grid | On Grid Solar Power System | Off Grid Solar Power System

How to convert on grid solar to Off Grid | On grid solar power system | Off grid solar power system

Many people install on-grid solar systems under PM Surya Ghar Muft Bijli Yojana, but they later realize that on-grid systems stop working during power cuts because they depend entirely on grid supply. The benefit of on-grid systems is that they do not require batteries, but the major drawback is that you get no electricity from your solar panels when the grid is off. Because of this, many people look for ways to convert their existing on-grid system into an off-grid or backup-capable system.

There are multiple ways to do this. The simplest is to disconnect the panels from the on-grid inverter and connect them to a separate off-grid inverter, but off-grid inverters support much lower voltage ranges compared to on-grid inverters. Since on-grid systems usually have many panels connected in series, their VOC becomes very high, so you must choose an off-grid inverter that can handle this voltage.

A DC changeover switch can redirect all panels between the on-grid inverter and the off-grid inverter, but this option becomes costly because it requires a higher-capacity inverter and more batteries.

Another method is to use batteryless transformerless inverters, such as the Smarten Kranti series, which can run home loads directly from solar panels without batteries. These models support high voltages and can take up to 15 panels in a single series string. They require a minimum of 400 volts input and support up to 750 volts, allowing users with large on-grid systems to convert easily. However, they need at least 5 kW to 12 kW of solar panels depending on inverter size, and if solar voltage drops below 300 volts, the load switches off.

The most complete and reliable solution is to convert the system to a hybrid inverter. Hybrid inverters work both as on-grid and off-grid, allowing grid export and also providing backup during power cuts.

Overall, these are the practical methods to convert an existing on-grid solar system into an off-grid or hybrid setup so you can use solar power even when the grid is down.


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