Sulfarid/Megapulse on dual batteries

Submitted: Wednesday, Jan 09, 2008 at 20:05
ThreadID: 53282 Views:3024 Replies:4 FollowUps:4
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Further to some recent threads on these units, I have question. I have a typical dual battery system with a Pirhana management system. If I connect a Sulfarid/Megapulse to the main battery, would the auxilliary battery also get benefit (assuming the Pirhana has connected the two batteries of course)?

If so, then the question needs to asked about any benefit to the two additional batteries in my caravan (making 4 batteries in total) as they are simply wired in parallel to the auxilliary via an anderson connector?

Cheers
Gerry
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Reply By: Derek from Affordable Batteries & Radiators - Wednesday, Jan 09, 2008 at 22:23

Wednesday, Jan 09, 2008 at 22:23
Hi Gerry

2m max distance with thick cables and fit it to the auxiliary battery not the main.

Regards

Derek.
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Follow Up By: Member - Mick O (VIC) - Thursday, Jan 10, 2008 at 18:28

Thursday, Jan 10, 2008 at 18:28
Derek,

I have a mega pulse on the main battery (Came with the vehicle). Two auxillary (90 A/H AGMS, one under bonnet, second in rear passenger area) so I would only need one of your supharid units to service the two aux batts. Is that Right?

Thanks. Mick
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Follow Up By: Derek from Affordable Batteries & Radiators - Thursday, Jan 10, 2008 at 18:31

Thursday, Jan 10, 2008 at 18:31
Hi Mick

2m max cable length. I would say the wire run is more than that so you may need 2 units.

Regards

Derek.
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Follow Up By: Mainey (wa) - Thursday, Jan 10, 2008 at 19:12

Thursday, Jan 10, 2008 at 19:12
Mick,
the Megapulse series III is rated well above 400ah from memory, and if the battery cable is sufficient to fully charge each battery in parallel, I don't think the battery distance was relevant from recolection of the fitting instructions.
Mainey...
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Follow Up By: disco1942 - Thursday, Jan 10, 2008 at 19:39

Thursday, Jan 10, 2008 at 19:39
Mainey

The Megapulse has a very sharp, high frequency pulse. To keep the pulse sharp over a long distance you need a good low frequency loss over your cable to maintain the sharpness of the pulse. A battery cable is not a good transmission line at high frequencies, It does have some inductance and a lot of capacitance. Knowing the problem of getting good earth bus-bars in laboratory conditions I am surprised at the 2 metre length that Derek is quoting - I reckon that the pulses would be starting to roll off at that distance.

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Reply By: Mainey (wa) - Thursday, Jan 10, 2008 at 00:31

Thursday, Jan 10, 2008 at 00:31
With the megapulse series II it won't work.
They will only work on one battery.

However the series III will work on two batteries in parallel.

I'm not saying they will work with a Pirhana inline connecting the two together.
Mainey...



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Reply By: Member - Mike DID - Thursday, Jan 10, 2008 at 08:05

Thursday, Jan 10, 2008 at 08:05
For desuphators, to work they need to be connected for a long time.

The Isolator only connects the Main and Aux while driving, so one Sulfarid can only work on two batteries, while you're driving.

However I doubt that it will have much effect while the car is running, because you have so many other loads connected that'll damp the high-voltage pulse.

If I had three batteries, I would move the Sulfarid to another battery every month.
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Reply By: GerryP - Thursday, Jan 10, 2008 at 23:21

Thursday, Jan 10, 2008 at 23:21
Many thanks everyone. As usual, lot's of good replies from this forum.

Cheers
Gerry
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