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 > For Those of You w/Magnum Inverter/Chargers

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BFL13

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Posted: 07/31/12 11:05am Link  |  Print  |  Notify Moderator

CA, I lost track. Where are/were we on getting new graphs for running it on a Honda at 124v compared with clean shore power at 115v and all that?


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smkettner

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Posted: 07/31/12 11:43am Link  |  Print  |  Notify Moderator

When the OP said 10 amps... is that input or output?


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jauguston

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Posted: 07/31/12 04:00pm Link  |  Print  |  Notify Moderator

My 2012 will put out the same max amps with my QD7500 or my 30a home hookup about 105a. That is charging 6-6v AGM's that are low.

Jim


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jauguston

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Posted: 07/31/12 03:24pm Link  |  Print  |  Notify Moderator

13,

Where do you get "clean 115v shore power"? I get my shore from Puget Sound Energy and its 122v or real close most of the time.

Jim

BFL13

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Posted: 07/31/12 03:50pm Link  |  Print  |  Notify Moderator

The idea was to get clean power by getting shore power. That was to eliminate the wave form problem of the Onan. However shore power voltage depends on length of extension cord etc, so it could be 115, depending.

The charger varies its Dc output with input voltage (even when clean) so it might only do 100amps when on a Honda (or at home) and not on clean shore power at 115. Actually at home can be worse where in your yard you could be on a long extension cord but at a campground not so long a cord (but then everyone will turn on the air-conditioning --oops)

BFL13

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Posted: 07/31/12 04:05pm Link  |  Print  |  Notify Moderator

"My 2012 will put out the same max amps with my QD7500 or my 30a home hookup about 105a. That is charging 6-6v AGM's that are low."

CA was only getting 80amps and last heard was working on why but needed to try proper input first.

2oldman

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Posted: 07/31/12 04:29pm Link  |  Print  |  Notify Moderator

smkettner wrote:

When the OP said 10 amps... is that input or output?
in

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Posted: 07/31/12 04:37pm Link  |  Print  |  Notify Moderator

BFL13 wrote:

CA, I lost track. Where are/were we on getting new graphs for running it on a Honda at 124v compared with clean shore power at 115v and all that?
I don't have a Honda and have not been in a situation with 120V AC and low batteries. However, for a brief time with mostly charged batteries and 118V I did see a more accurate DC display on the Magnum meter.

So it seems reasonable to conclude that based on input from Magnum and my observations the DC amp display will be accurate when the AC input is 120V. I haven't even thought about more than 120V.


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Posted: 07/31/12 04:59pm Link  |  Print  |  Notify Moderator

To be clear: The Magnum DC amps display is based on the AC voltage input and not the actual DC output. I've observed a 100A display with 113.9V AC input and the actual DC output was 80A. Since I was in the standard 120 +- 10% range of 113.9V it seemed "proper". But Magnum has a different design point, namely the display will be reasonablly correct at 120V AC input and I assume that this means at the chargers AC input terminals.

There is more information in other threads.


BFL13 wrote:

"My 2012 will put out the same max amps with my QD7500 or my 30a home hookup about 105a. That is charging 6-6v AGM's that are low."

CA was only getting 80amps and last heard was working on why but needed to try proper input first.


jauguston

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Posted: 07/31/12 05:15pm Link  |  Print  |  Notify Moderator

CA,

How did you come up with the different numbers? You say the Magnum control panel says it is putting out 100a then you say its only putting out 80a when Magnum says its putting out 100a. What is not working right in your system that got you to do this type of testing. Is the meter you see the 80a on more trustworthy than Magnums? If you are monitoring at the batteries to get the 80a number are you considering that the other 20a is probably running coach systems

Jim

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