Inverter/Charger Questions - SailNet Community
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post #1 of 7 Old 10-16-2019 Thread Starter
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Inverter/Charger Questions

I haven't really posted much in the forums over the last few years. This winter's project will be re-doing the electrical system aboard my boat and cleaning up/organizing the rats nest that lives behind the panel(biggest part of the project). That being said, I am reading the manual for my Magnum MS2812 inverter/charger and it shows the following as recommended:

AC IN to HOT IN 1 > Jumper> HOT IN 2

AC OUT from HOT IN 2 > Jumper > HOT IN 1

Does anyone have any opinions on why this maybe? Currently looking at the charger, it definitely is not wired that way. The only reason I could think this was in the event of a short, that jumper would short out first, but then what is the point of having it fused if you have the jumper as your short point?
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post #2 of 7 Old 10-17-2019
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Re: Inverter/Charger Questions

I do not know this inverter/charger but from the given information it may have two separate units integrated inside. so you can either connect it to two separate sets of inputs and outputs or as advised by default connect the inputs and the outputs and have single input and single output using the two internal devices, in such case I assume the purpose is to double the power you can handle.
again,you should find the manual and read it.
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post #3 of 7 Old 4 Weeks Ago Thread Starter
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I'll have to re-read the manual again. I may have missed it, but the reason I posted on here was due to the fact that I couldnt find the reason as why one should wire it this way.

Your explanation does make sense though, but if I cant find the reason in the manual I'll contact the manufacturer for an answering
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Re: Inverter/Charger Questions

I'm very reluctant to guess at this one, given it's importance. I installed the exact I/C, but don't recall this issue. It's been a few years and memory may have been erased.

I did send an email to Magnum's technical assistance address to clarify some setup issues on the Advanced Remote and they were very helpful.

I hope you are also installing their battery monitor kit and advanced remote (there is a basic remote, but it's not the same at all). They are a minor increase in cost, but a major increase in functionality. The IC alone can't do many things it's capable of doing, without the BMK and Advance Remote.


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post #5 of 7 Old 4 Weeks Ago Thread Starter
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Quote:
Originally Posted by Minnewaska View Post
I'm very reluctant to guess at this one, given it's importance. I installed the exact I/C, but don't recall this issue. It's been a few years and memory may have been erased.

I did send an email to Magnum's technical assistance address to clarify some setup issues on the Advanced Remote and they were very helpful.

I hope you are also installing their battery monitor kit and advanced remote (there is a basic remote, but it's not the same at all). They are a minor increase in cost, but a major increase in functionality. The IC alone can't do many things it's capable of doing, without the BMK and Advance Remote.
I do have the BMK and advanced panel. The system was onboard when I bought the boat, but the previous owners wired it in such a dumb way that I chose to redo it - to the manuals spec. This includes seperating out shore power loads and inverter loads on two panels.

The inverter worked fine in their setup, but was not fused at all and they had the output running from the inverter to the 2 way selector switch for the shore power - shore being shore power and gen being inverter, then they had a separate 40amp charger for charging batteries
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Re: Inverter/Charger Questions

I hate when switches are bastardized and don’t what they’re labeled to do.
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post #7 of 7 Old 3 Weeks Ago Thread Starter
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Re: Inverter/Charger Questions

Got a response from Magnum. So either works, but seems like i will be following their instructions as it is a simple thing to do.

Quote:
You can wire either single in single out (1-In 1-Out) without jumper is you want.

The idea behind the jumper is to spread the amperage across the 2 contacts inside inverter but no needed.

Make sure the single in to Hot 1 is no more than 30 amps.
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