Dual Battery Isolator Waterproof Mini Voltage Sensitive Relay 12V 50A Dual Battery Smart Isolator
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
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Single Phase Voltage Control Relay Over Voltage and Under Voltage Protection Monitoring Relay 10A
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
GEYA Over Voltage and Under Voltage Protection Relay DC12V 24V 48V 220V 10A Voltage Protector Relay
Aliexpress UK
Note: The benefit of this type of relay is that it does not require a connection to the alternator or any modifications to the existing vehicle electrical system. The location is very good.
eBay
Relay Module WiFi 4‑Channel ESP8266 Development Board Voltage Monitoring Relay Industrial Parts for
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
GEYA GPS8-03 Din Rail 3 Phase Voltage Relay 3P+N Over and Under Voltage Monitor Relays Protector
Aliexpress UK
We are an approved Durite UK Distributor. Allows split charging of second battery bank without discharging the primary/start battery, relay makes at 13.3 volts and breaks at 12.65 volt. 12 volt 140 amp.
eBay
GEYA GRV8-04 3 Phase Voltage Monitoring Relay with Phase protection Delay Time Overvoltage and
Aliexpress UK
A VSR is a relay that separates the car's main cranking battery and the secondary accessories battery. The VSR is triggered by detecting when the alternator is running and charging the car battery. When the VSR detects that the car is on, it says "Hey the car's on!
eBay
Adjustable Digital Voltage Relay 220V 40A/63A Household Circuit Breaker Surge Protector Limit Over
Aliexpress UK
When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery. So it does not drain your main starter battery and you will always be able to start your vehicle.
eBay
Waterproof Automotive Relay 4 Pin 5 Pin 30A Auto Relay With Fuse Coil Voltage DC 12V/24V Relay
Aliexpress UK
Direct Alternative To The Durite 140A VSR. This simple device allows the charging of two separate battery banks from a single charging source such as vehicle alternator with no risk of flattening your battery bank.
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