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.
Should you retrofit a PV storage unit?
Sooner or later, almost every PV operator will consider retrofitting their system with a PV unit. Using more solar power yourself means higher returns because, by avoiding using an external energy supply, you save more than you would usually get when feeding into the grid. Why retrofit a PV storage unit?
Should you retrofit your photovoltaic arrays with storage batteries?
A lot of companies and households consider the option of retrofitting their photovoltaic arrays with storage batteries. A residential energy storage system provides quite a few advantages and is particular attractive for those who have a PV system installed.
Let's say you've owned a solar energy system for several years, and over time, your energy needs have expanded. Whether you need more power to charge a new electric vehicle or because of increased home consumption (maybe you invested in a new heat pump), there are many reasons why people may want to retrofit an existing solar energy system.
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.
What is a storage-ready solar system?
The so-called storage-ready systems are equipped with inverters which allow easy integration of batteries with PV systems. In this case, it is easy to add a battery with almost no auxiliary equipment. In the event the solar system's design does not imply a battery addition, it is somewhat more difficult to install storage.
What is an AC-coupled solar retrofit?
An AC-coupled retrofit involves installing a separate inverter for your battery, allowing you to keep your existing solar inverter. Without the need to redesign or rewire your solar panel system, this option is typically more affordable upfront.