Whatever the case, to retrofit an AC coupled storage system, the PV inverter must be installed such that it is isolated from the grid during an outage by the battery based inverter. To do so, a critical loads panel is added to the facility where the PV inverter is interconnected.
The good news is that it's entirely possible to add battery storage to an existing solar panel setup. So-called “storage ready” systems are already equipped with an inverter that can easily direct excess power into a battery. But even if your system wasn't designed with storage in mind, you still have options.
This setup allows your battery to operate independently from your solar panels, avoiding the need for major equipment upgrades. For greater efficiency, you can opt to replace your current inverter with a hybrid model and install a DC-coupled battery that shares the inverter with your solar panels.
If the retrofitted AC coupled storage system is to be operational in a grid backup mode, it is important to ensure the PV inverter and battery inverter communicate effectively. If they do not, the PV system could overcharge the batteries during a grid outage when local loads are minimal.
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This setup allows your battery to operate independently from your
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This setup allows your battery to operate independently from your solar panels, avoiding the need for major equipment upgrades. For greater efficiency, you can opt to replace your current
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