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
SONOFF Zigbee Human Presence Sensor SNZB-06P Presence Detection Light Sensing Smart Home Automation For Google Alexa Alice
Aliexpress UK
The kit has everything that you need to install a split charging system in your vehicle including a relay that prevents your main battery from draining while the engine is stopped. 2 x Midi inline fuse holders.
eBay
Fld Brand Night Light Body Intelligent Sensing Lamp For Home Bedroom Dormitory Eye Protection Essential
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
Optical Flow Positioning Aerial Photography RC Helicopter 1080P Gravity Sensing Image Transmission App Remote Control Helicopter
Aliexpress UK
2 x 250mm RED 70amp READY MADE cable from Battery to fuse holder lead. 1 x 500mm RED 70amp READY MADE cable Relay to fuse holder lead. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
eBay
MINGBEN Radar Sensor Ceiling Light Photosensitive Motion Sensor Automatic Sensing 15W 20W 40W Ac220V LED Light Corridor Garage
Aliexpress UK
10mtrs 110amp 16mm2 Red Power Cable. 1mtr 110amp 16mm2 Black Earth Cable. 2 x Fuse holders & 100amp Fuses including spares. Heat shrink to protect all the connections. 15 x Cable ties + 10 x adhesive cable tie fixings to keep everything tidy.
eBay
High quality outdoor solar street light with long-term operation, automatic sensing, waterproof, high-power solar street light
Aliexpress UK
8mtrs 110amp 16mm2 Red Power Cable. 1mtr 110amp 16mm2 black Earth Cable. 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
DC 12V/24V LED Motion Sensor Switch Body Infrared Sensing Controller Motion Detector PIR Motion Sensor for LED Strips/Bulbs
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
SONOFF SNZB-06P Zigbee Human Presence Sensor Presence Detection Light Sensing Smart Home Works Alexa Google IHost ZB Bridge-P
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
Single Double Human Sensing Light Tape Set Motion Activate Under Bed Stairs Corner Passageway Lighting Automatically Turn on off
Aliexpress UK