Dual Battery Isolators also feature surge protection and a L.E.D indicator designed to alert the user when the unit is engaged. - Suitable for most 12V charging systems- Surge protection. When your engine is switched off, the relay will isolate your leisure battery(s) from your main starter battery.
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300W/600W Solar Panel Kits 12V Solar Panel 100A Controller Power Portable Solar Battery Charger for Outdoor Camping Mobile RV
Aliexpress UK
【Fit All types of Battery】 -- Fit for Lithium Battery, Lead-acid Battery, AGM Battery etc. 【Delay Setting Function】 —— The new delay function avoids frequent switching on and off of the isolator due to unstable current, which prolongs the isolator and battery life.
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300W 12V Solar Panel Kit with 10A-100A Controller USB Port Portable Solar Battery Charger Suitable for Outdoor Camping Mobile RV
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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
TYPE-C 18650 Lithium Battery Charging Module Diy Kit DC3.7V Lithium Li Battery Charging Charger Board DIY Power Bank
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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1pc 1V 1.5V 2V Min Solar Panel 100mA 150mA 300mA 500mA DIY Solar kit for Battery Cell Phone Charger with connect wire
Aliexpress UK
Brought never got round to fitting, now no longer needed.
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Gadget Cable Organizer Storage Bag Travel Electronic Accessories Cable Pouch Case USB Charger Power Bank Holder Digitals Kit Bag
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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XH-M601 Intelligent Charger Power Control Panel Automatic Charging Power 12V Battery Charging Control Board For Diy Kit
Aliexpress UK
Adaptive 3-phase Charging : Bulk, Boost, and Float. Maximum solar input current: 20A. Compatible with Multiple battery types : AGM, GEL, Flooded, and Lithium. 1 x 500mm RED 70amp READY MADE cable Relay to fuse holder lead.
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510 Thread Battery Cart Pen Adjustable Voltage Smart Power Pen, Mini Soldering Iron Kit With USB Charger
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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
500W/1000W 12V Photovoltaic Solar Panel Power Bank Kit 100A Controller Solar Plate for Home/Camping/RV/Car Fast Battery Charger
Aliexpress UK