Add battery back-up power option to existing grid-tied PV and solar systems: Page 14 of 14

August 05, 2013 //By Mark Mays
Add battery back-up power option to existing grid-tied PV and solar systems
Mark Mays of OutBack Power explains how to add a battery back-up power option to existing grid-tied PV and solar systems.
Radian-series inverter, the result is higher-performance and greater reliability in a more compact, cost-effective package, enabling the user to invest in higher-quality energy storage and thoroughly optimizing their renewable energy system.
 
Figure 6 below shows a simplified single line diagram of the AC Coupled system. The drawing shows the generator option which is not required if daily sun is expected or critical loads can be shed until more sun is available.
 

Figure 6 – Single line diagram of an OutBack Radian inverter AC Coupled to a Grid-Tied Inverter
 
Figure 7 below is a detailed wiring diagram of the Radian GSLC175-AC-120/240 GSLC load center. Field wiring lands on the terminal bus bars as designated below with “X”. If desired, a two-wire generator start can be connected to pins 21 and 24 of the 48V relay.

 

 
Figure7–Detail diagram of the Radian GSLC175-AC-120/240 GSLC load center wired for AC Coupling. Field connections designated with “X”.
 
About the author

Mark Mays is an applications engineer at OutBack Power focusing on system design, configuration, field commissioning and troubleshooting of both off-grid and grid connected solar energy systems. Previous industry experience included power quality audits, product development of power quality analyzers, development and delivery of CEU training programs in power quality and electrical troubleshooting for the electrical utility industry, licensed electricians and electrical engineers.

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