Vehicle & Technical > Defender

Is an 85A relay big enough for a split charger in my TD5 90?

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vtrdaz:
I've got an 85A relay and wondered if it would be big enough to cope with a split charger on my td5 90 (will be powering an optima yellow top)

Cheers

Darren

Terranosaurus:
How bigs you're alternator - if it's under 85A then the 85A relay will be fine.

vtrdaz:
think it's 120A on a td5 - does this mean it charges the battery at 120A?

wizard:
No this means that the maximum current (or load ) you can put on it is 120amps.
A totally flat battery will draw about 30amps until it begins to charge then the current will drop steadely down untill fully charged.
A 85 amp relay will be more than fine for most split charge applications.

wizard :twisted:

vtrdaz:
Thanks wizard - much appreciated!.
The solenoid won't be used for anything heavy - just running a fridge and a few other low power things - just wasn't sure whether the 120A meant alternator output or what it could be loaded up to , so as you say - the 85A solenoid is probably more than enough.

All cleared up now - cheers!

Darren

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