AC-coupled systems are ideal for stand-alone residential and commercial projects of varying sizes due to their advanced technologies and features that are best suited for off-grid applications.
AC-coupled applications can be utilised for both utility-interactive and stand-alone projects.
What is an AC- coupled system?
An AC-coupled system processes the power it generates – be it from wind turbines or Solar PV arrays – via a grid-tied inverter and then to a battery bank via a battery-based inverter.
Grid-direct inverters replace the role of DC-charge controllers and PV source-circuit combiner boxes that are commonly found in their DC-coupled counterparts.
Also, battery regulation plays a vital role in this system and is accomplished using a variety of methods that include diversion controllers and blackout relays, among others.
In an AC-coupled system, any excess energy will be used to charge the batteries, and the battery inverter will prevent the occurrence of overcharging as it is able to regulate the power output of the PV inverter.
Although an AC-coupled system can work on either stand-alone or utility-interactive projects, it is typically used for stand-alone applications due to its superior generator controls, energy management features, and multi-mode inverters/chargers.
In addition to that, the capacity of solar inverters to operate with high DC voltages allow consumers to install huge AC-coupled systems without running into that much electricity production limitations.
Even though AC-coupled systems are slightly less efficient at charging than their DC-coupled counterparts, they are extremely powerful, incredibly easy to set up, and are very efficient when it comes to powering AC loads during the daytime.
Want to know more about AC-coupled systems?
GRES can design, install, commission and maintenance PV integrated battery storage for both residential and commercial sector.
We provide feasibility assessments to confirm what battery storage is a viable investment for our clients.
Our services include:
- Analysis of load profile, electricity tariffs, renewable generation and storage flows
- Financial modelling of the benefits of battery storage
- Investigation of earnings from spot market trading using software and smart controls, and payments from network companies for capacity benefits
- GRES offers the Powerwall battery storage solution for new solar installations and as a retrofit to existing systems
- GRES combines stunning design with outstanding German quality
- Product warranty: 5 yrs-10yrs
- Battery warranty: 10 Yrs