What are VSR and How to install a VSR

YIS Marine is a professional manufacturer devoted to providing high quality marine electrical and electronics products. By designing and manufacturing in-house and having quality control at Taiwan headquarter, we are able to offer high quality marine products at competitive prices.

What are VSR and How to install a VSR

VSR (Voltage Sensitive Relay) or ACR (Automatic Charging Relay) are automatically controlled relay switches that allow two batteries to be combined when charging, and to be isolated when not charging and current is draining from one of the batteries. This way you can automatically preserve a fully charged battery at all time, especially the start battery for starting the engine. Below is a typically wiring diagram from a VSR in a two Battery system (Start and House batteries).

Normally the VSR senses voltage from the ENG (engine) port to decide whether it should close (make) or open (break) the connection, so if the Engine is ON the sensing voltage would be high and VSR will turn ON and make the connection – allowing BOTH Start and House batteries being charged. And when the Engine is OFF the voltage will drop and VSR will turn OFF by cutting the connection and this way the loads would draw powers from ONLY the house battery – preserving the full power capacity in the Start Battery.


Video

What is a VSR and How does a VSR work? Smart Battery Isolator for Dual battery system explained



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Marine Accessories, Switch Panels, Fuses, Circuit Breakers, Switches, Lights Since 1992 | Yih Sean Enterprise Co., Ltd.

Based in Taiwan, China since 1992, Yih Sean Enterprise Co., Ltd. is a marine electrical products manufacturer. Main marine and boat products, including 12/24V accessories, switch panels, fuses, circuit breakers, switches and lights, which meet international safety standards.

YIS Marine is a professional manufacturer devoted to providing high quality marine electrical and electronics products. By designing and manufacturing in-house and having quality control at Taiwan headquarter, we are able to offer high quality marine products at competitive prices. with more than 20 years manufacturing experience for Marine Products, Switch Panel, Led Light, Switch, Plug, Socket, Terminal Block and Bus Bar in Taiwan.

YIS Marine has been offering customers high-quality marine and boat electrical products, both with advanced technology and 20 years of experience, YIS Marine ensures each customer's demands are met.