Split charge relay

Redmask09

Hello,

I've got a battery charger obviously connected to my leisure battery ... When I'm connected to the electric hookup it charges it ....

Anyways my question is if I install a split charge relay which connects to my leisure battery and charges it when engine running... Would this cause problems or bugger my charger ? For ehu ? Would I just after connect one or the other ?

Also I'm thinking of linking two leisure batteries together so they both charge ... What amp rating would I need for the split charge relay my leisure battery is 110ah

Thanks
 

Redmask09

FULL TIMER said:
can't see a problem unless you have engine running whilst on hook up maybe. as for the relay I either use these Durite voltage sensing split charge relay 140 amp
or these Auto Electrical Parts, Auto Electrical Components, Electrical Parts - - Amber Valley AVSPC12 12v 200A Intelligent Split Charge Voltage Controlled Relay
I actually prefer the Amber Valley ones but either would be more than capable for your needs using correct wiring and very easy to fit
Click to expand...

Thank you very much for the response :)
 

Redmask09

FULL TIMER said:
can't see a problem unless you have engine running whilst on hook up maybe. as for the relay I either use these Durite voltage sensing split charge relay 140 amp
or these Auto Electrical Parts, Auto Electrical Components, Electrical Parts - - Amber Valley AVSPC12 12v 200A Intelligent Split Charge Voltage Controlled Relay
I actually prefer the Amber Valley ones but either would be more than capable for your needs using correct wiring and very easy to fit
Click to expand...

Do I need a positive from engine battery to both leisure battery's or can I have one positive to one leisure battery then join leisure to leisure ?
 

Tony Lee

Quite common to have several charging sources hooked up at the same time - eg solar, alternator and ??? (mains charger) and generally they coexist quite happily with one source doing most of the work and the others just idling along. Very rarely they might "fight" harmlessly once the batteries get to full charge but it usually doesn't do any harm
 

Redmask09

Tony Lee said:
Quite common to have several charging sources hooked up at the same time - eg solar, alternator and ??? (mains charger) and generally they coexist quite happily with one source doing most of the work and the others just idling along. Very rarely they might "fight" harmlessly once the batteries get to full charge but it usually doesn't do any harm
Click to expand...

That's really good to know thanks for that ... What's the best option to charge battery on the go when ehu isn't available....

I no kinda switching the subject here but I also need a good invertor... To use power socket when 240v not available .... Is it possible to plug a extension in to the invertor to allow multi things connected, maybe not all at same time though...
 

FULL TIMER

Redmask09 said:
Do I need a positive from engine battery to both leisure battery's or can I have one positive to one leisure battery then join leisure to leisure ?
Click to expand...

with either of these relay's you just need one fused cable from engine battery to the relay and one from the relay to your leisure battery also fused, if using two leisure batteries as one bank then these must be linked together pos - pos /neg - neg. etc I also put a negative cable down to a chassis earth, obviously the positive cables both need to be fused near to the battery they each connect to. It really should be said that if you are not totally comfortable with the appropriate wiring etc then you really should seek professional help, wouldn't want to see your pride and joy go up in smoke.
 

Redmask09

FULL TIMER said:
with either of these relay's you just need one fused cable from engine battery to the relay and one from the relay to your leisure battery also fused, if using two leisure batteries as one bank then these must be linked together pos - pos /neg - neg. etc I also put a negative cable down to a chassis earth, obviously the positive cables both need to be fused near to the battery they each connect to. It really should be said that if you are not totally comfortable with the appropriate wiring etc then you really should seek professional help, wouldn't want to see your pride and joy go up in smoke.
Click to expand...

Thanks for the details .. I kinda knew what needed doing etc and fuses from reading up... Just gathering more intel lol but yes I will be getting it done from friend who is a auto electrician ...

Do you no which way is best to wire the fridge up so works on the move ? Or as continual power but switched on/off via fridge ???
 

Firefox

You'll probably be OK with about 50-70A capacity on the relay connection. Standard alternators can't put out more than that.

Surprisingly the smartcom relay and others recommend 30A cables and a 15A or 20A fuse. This works fine 95% of the time till you leave the batteries really flat and then the inline fuse blows. That's why I'd say 30-40A fuse and 50-70A cable is more on the mark.

Normally a fridge is wired up via a separate ignition activated really so it runs on 12V when the engine is running.
 

ellisboy

The smartcom has an outlet for 12v side of a three way fridge.I use the smartcom system with 50amp fuses and 16mm cables,it works well.
 
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