Sargent Ec400 wiring (3 Viewers)

[Hobbzy]

Hi all, I'm fitting a b2b charger in my MH by bypassing the split charger within the sargent unit, I know I have to fit an isolation relay to stop both chargers trying to charge at the same time. My question is, should the isolation relay be connected to the vehicle battery or the leisure battery side of the system? Or would either work just a well?

P.s there are 2 live cables each for both the vehicle and leisure batteries in P1 and P2 of the sargent unit does it matter which one is used to connect the relay?

 

[CAB96]

Hello and welcome to the forum.

I can't help I'm afraid, but I'm sure someone knowledgeable will be along soon.

 

[JimmE]

I fitted a relay to disconnect the engine battery when the engine is running.

You need to disconnect both cables (they use two thinnner cables rather than one thicker cable), so would need a ‘double pole’ relay (effectively two relays in one) or else you’ll have to use two relays as I did.

I guess technically with a suitable crimp and suitably rated relay, you could also use a single relay for both cables by joining both together on the same terminal. I didn’t consider that at the time!

 

[Insider]

Think I might have a solution here. Need to check my Sargent version in the morning.

 

[Insider]

this is what I used.

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[Hobbzy]

I fitted a relay to disconnect the engine battery when the engine is running.

You need to disconnect both cables (they use two thinnner cables rather than one thicker cable), so would need a ‘double pole’ relay (effectively two relays in one) or else you’ll have to use two relays as I did.

I guess technically with a suitable crimp and suitably rated relay, you could also use a single relay for both cables by joining both together on the same terminal. I didn’t consider that at the time!



View attachment 953374

That's great, thanks JimmE. Instead of using 2 relays couldn't piggyback spade connectors be used to link the 2 thinner cables to the same terminal on the relay? Also do you have any idea of the cable size/amp rating of the thinner cables?

 

[Hobbzy]

View attachment 953376this is what I used.

Thanks insider