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Voltage Sensitive Relay (VSR) / Automatic Charging Relay 125A Dual Battery Isolator (VSR) Fully automatic with emergency overri

Easy to install, you can easily complete the installation by yourself

SKU: 562432
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Price() 24 22.8 21.6 21.12
Voltage Sensitive Relay (VSR) / Automatic Charging Relay 125A Dual Battery Isolator (VSR) Fully automatic with emergency overri

24 26.88 (11% OFF)

/Scripts/ckeditor/ckfinder/userfiles/YB02335/images/3647.jpgVoltage Sensitive Relay (VSR)
Automatic Charging Relay  125A Dual Battery Isolator (VSR) Fully automatic with emergency override Ideal

A voltage sensitive relay (VSR) is the best way to ensure you can always get your dual-battery vehicle started.
If the radio stops working that’s one thing, but if you’re stranded because your car cannot start because you 
ran your fridge for too long, that’s potentially a life and death scenario. It allows two batteries to be charged 
from your alternator. Once your main starter battery is sufficiently charged, it will begin charging the second battery too. 
Fully automatic with emergency override.

Automatically combines two batteries when charging and isolates the two batteries when not charging.
No voltage drops comparing to battery isolator diodes (0.6V).
Dimensions fits Heavy Duty Modular Fuse Box Series (BF43x) and Battery Switch, matching mainstream products in market 

Built-in LED indication (ON when VSR engages)
Port for remote LED indicating VSR status (LED not included)
(If the VSR equipment is installed in a place that is difficult to see,
 it can be installed by an external indicator light, installed in a place that the operator can easily see,
 such as the instrument panel, and the negative pole of the external light is connected to the black line to be cut on the VSR equipment.)

Surface or panel mount options provides flexibility when installing
Optional Storage Mode allows zero power consumption when engine is off.
(When you do not need this device (VSR) function, you can cut off the red line and connect an ON-OFF switch to control the device's power off.
Normally, if the boat or yacht is not used for a long time, turn off the VSR to achieve zero power consumption when it is not used for a long time)

Functional Features Example: 
After the engine stalls, the left House battery discharges to the upper left load device,and the VSR disconnects when the battery voltage drops below 12.8V.?
The Start Battery on the right will not discharge to the device
When the battery on your left is not charging, it is used up.
At least there is a little battery on the right that allows you to start the engine

Nominal Voltage | DC 12V
Combine / Open Voltage | DC 13.3V / 12.8V
Continuous Current Rating | 125A
Intermittent Current Rating | 140A
Power Consumption | 10mA (Standby) / 330mA (Engage) / 0mA (Storage Mode)
Certification:CE  IP67

Dimensions: 2.68 in x 2.68 in x 2.28 in (6.8 cm x 6.8 cm x 5.8 cm)
Weight: 8.11 oz (230 g)


Quantity1 set
MaterialGlass fiber reinforced nylon
Shade Of ColorBlack
Current125 A
Power Supply12V
Packing List1×Relay


We ship to over 200 countries and offer 8 different international shipping methods:

Shipping from Chinese/Hong Kong Warehouse

Shipping Type




Airmail/ Register airmail

Canada, Netherlands, Spain, Germany, France, Japan, Republic of Korea, United Kingdom

7-20 business days

Tax may be needed

Australia, New Zealand, Singapore

7-25 business days

Belgium, Denmark, Finland, Ireland, Norway, Portugal, Sweden, Switzerland

7-25 business days

Brazil, Russia, Mexico

15-35 business days

Other countries

7-25 business days

Post Netherlands

Belgium,Czech Republic, Denmark,Estonia,Finland, France, Germany,Greece, Hungary,Croatia,Ireland, Iceland,Italy,Latvia,Lithuania,Luxembourg, Netherlands,Poland,Portugal,Romania,Slovakia, Slovenia,Switzerland,Norway

8-15 business days


15-20 business days



3-11 business days

France Direct Line


5-8 business days

Most of the products are free for tax fee except cellphones ,tablets,Cameras, Players and some special products.

Germany Direct Line


Italy Direct Line


Spain Direct Line


UK Direct Line

United Kingdom

Note:Most of the products were dispatched in 72 hours , some products we need buy from our suppliers were dispatch in 5-7 business days

Note: The shipping times are a general guide and do not apply to some remote areas. It will take longer during the holiday seasons and peak season . We are not able to deliver to Chile, Argentina,Antarctica,China,Hong Kong,Macao,Taiwan,Bonaire,Saint Eustatius And Saba , Burundi,Dominica, Saint Martin, Samoa ,Sint Maarten,Swaziland ,Tuvalu ,United Arab Emirates,Vatican City State , Virgin Islands because of the logistics problem.


After the order is shipped, you could use the tracking number to log in logistics website to trace the delivery.

Should you have any question about delivery, please contact us by ticket.