Voltage Sensitive Relay, it charges the second battery when the main voltage is above 13.3V and switches off when it drops below 12.8V.1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
11th Dec 2018 5:52 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Battery
Is this one of them then?
Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
It is, but it wont cope with more than about 20Amp peak. You'll need something that can cope with 200A.1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
11th Dec 2018 7:22 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72768
^^^^^ And think Amps for other relay if winch is being supplied via that.
PS Never worried about Amps as was only keeping beer cold and phone/iPad charged.
11th Dec 2018 7:56 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
So this is how I think the set up was on the car it came off.
The voltage sensing bit just turns on one of the solenoids, that solenoid then turns on the other solenoid. that makes a circuit. The loadar controller can also turn on the solenoid if the engine is off but you need to winch.Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
11th Dec 2018 8:57 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72768
If it was me I’d put one of the relays down stream if the 2nd batt with its sensor feed through a switch, means the aux battery can be used for other things while keeping the winch isolated. Like keeping beer cold.
X marks the spot.
11th Dec 2018 9:02 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Battery
Could be version 2 then
Or maybe version 3 with only one relay in the split charge system.
You can see why I was thinking that one battery may be enough. It gets really complicatedDiscovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
11th Dec 2018 10:06 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72768
Too complicated for me, best keep it simple. Less to go wrong, and if/when it does, figure out what’s gone wrong. Assume something will fail at the worst possible time.
11th Dec 2018 10:10 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Battery
Yes I think your right. I will stick to one battery for now. I can add a second if needs be. If the winch is pulling power from main battery or second battery it doesent much matter.
If I add a second battery it would support the main battery, just as if it was the other way around.
Thanks
It helps to have a perspectiveDiscovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
11th Dec 2018 10:57 pm
Kelvo
Member Since: 07 Aug 2015
Location: Perth WA
Posts: 264
A winch should always be fed from the main battery, not the auxiliary battery. Unless you are using a minimum 70mm2 cable to link the main and auxiliary battery.MY14 TDV6
11th Dec 2018 11:45 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Battery
That settles it then Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
11th Dec 2018 11:49 pm
garrycol
Member Since: 06 Dec 2010
Location: Canberra
Posts: 1115
As Kelvo said you dont need a second battery for winching but your system does need to be in good order.
A secondary battery is usually a deep cycle system and cannot handle the loads of a winch where the starter battery can. The second battery is for providing low power draw items like fridges and lights in camping situations and is usually a deep cycle type to allow greater draw down.
You starter battery is designed to provide high power in short bursts like starting your engine so is ideal for winching where high loads are required in short bursts - winches have a duty cycle and this needs to be adhered to - usually winching for no more than 30secs at a time then a rest. Also the engine MUST be running when winching to keep power up to the battery (though if you engine is drowned and dead you may not have not choices)
So no secondary battery needed for winching but your starting system needs to be in top condition and keep your engine running.
Garry
12th Dec 2018 12:50 am
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Battery
Well thanks for all the replys, it has been good to get opinions and it has helped shape mine.
[/b]Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
12th Dec 2018 9:27 am
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Rough cable routes
Hi, I have been looking at mockimg up my second battery. can someone tell me if these cable routs and solenoid positions look to be sensible?
Course I need to move the gubbings for the battery yet but jus mt looking at the moment.
Also the 2nd hand kit I bought had 2 solenoids, one at each side which I took to be a need to isolate the big main live wire that runs over the engine bay. Does anyone else have 2 solenoids in their set up. I thought that I could usejust one solenoid and fit a big 200 amp fuse on the other end of the wire. Like the one in the photo
Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
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