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Old 02-25-2018, 12:59 PM   #1
Mini-Skoolie
 
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Installation Questions - Inverter with separate Converter

Hi everyone

I could really use some help right now. I have searched the internet (including this forum) for many hours to find the information I need, to no avail.

What I'm looking for is a detailed description or diagram that shows how to install the components I have so that they work as they should and not blow anything up.

All the main components I have were given to me, so I'm going with what I have.

Here's what I have:

- WFCO WF-9855 Converter/Charger
- WFCO WF-5110HP Inverter (this has an automatic transfer switch built in)
- WFCO WF-8930/50 Distribution Panel

I'm running a 50 amp system. I have no solar (but plan to add that later). I want to be able to charge the batteries from the alternator as we travel, so I know I need an isolator. I also know that I need a fuse between the batteries and the inverter. And I'll put a disconnect here on the negative lead.

I understand that I should probably power one side of the AC panel with the inverter and power the other side directly from shore power. Am I right about this?

Since the converter is powering the DC panel, do I power it from the inverter side of the AC panel? Is this an inefficient use of battery power? (the inverter transforming 12v to 120v and then the converter transforming 120v back to 12v) Is there another way to power the 12V system when not connected to shore power?

Also, the Inverter has a power cord attached. Where do I plug this in?

Is there anything else I've overlooked?

Again - if anyone has a diagram that shows in detail how to connect all this together and where exactly each connection is made, that would be great.

I appreciate any help anyone can provide!

Thanks in advance - Gary
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Old 02-25-2018, 02:14 PM   #2
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Just to deal with one of your issues ...

Depending on the kind of batteries you fit, you cannot effectively charge them from the alternator without an expensive converter/charger.

The reason is that flooded lead/acid batteries, the most common fitment, need a much higher charging voltage than an alternator is regulated for. They are not compatible with your starting batteries for charging purposes.

There are three ways to charge your house batteries. Solar, Shore-power and a generator. You can add a fourth, alternator, but it gets expensive especially if you need a new, higher-power, alternator.

This ... - WFCO WF-9855 Converter/Charger only goes to 14.4V during charging. It isn't enough. You will never get the FLA-type batteries above about 80%, even though a meter will tell you they are fully charged. And yes, I know RV manufacturers fit them. Shame on them.
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Old 02-25-2018, 02:38 PM   #3
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Switch the positive lead only. Switching the negative lead leaves the high (electric) potential positive lead still charged. For similar reasons the fuses should be in the positive lead(s). Google is your friend for sorting this stuff out.
Jack
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Old 02-25-2018, 04:36 PM   #4
Mini-Skoolie
 
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Quote:
Originally Posted by Twigg View Post
Just to deal with one of your issues ...

Depending on the kind of batteries you fit, you cannot effectively charge them from the alternator without an expensive converter/charger.

The reason is that flooded lead/acid batteries, the most common fitment, need a much higher charging voltage than an alternator is regulated for. They are not compatible with your starting batteries for charging purposes.

There are three ways to charge your house batteries. Solar, Shore-power and a generator. You can add a fourth, alternator, but it gets expensive especially if you need a new, higher-power, alternator.

This ... - WFCO WF-9855 Converter/Charger only goes to 14.4V during charging. It isn't enough. You will never get the FLA-type batteries above about 80%, even though a meter will tell you they are fully charged. And yes, I know RV manufacturers fit them. Shame on them.
Ah, good stuff to know. I was planning to use FLA batteries. Guess I'll have to rethink that.

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Old 02-25-2018, 04:37 PM   #5
Mini-Skoolie
 
Join Date: Mar 2016
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Quote:
Originally Posted by ol trunt View Post
Switch the positive lead only. Switching the negative lead leaves the high (electric) potential positive lead still charged. For similar reasons the fuses should be in the positive lead(s). Google is your friend for sorting this stuff out.
Jack
Gotcha. Thanks

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Old 03-02-2018, 06:23 PM   #6
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SO, can anyone tell me where I should plug in the Inverter and the Converter? Where should their power come from?
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Old 03-02-2018, 07:42 PM   #7
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Quote:
Originally Posted by ghodges View Post
SO, can anyone tell me where I should plug in the Inverter and the Converter? Where should their power come from?
12V input to the Inverter comes from the house batteries. 120V input comes from your shore-power connection.

120V output goes to the input of your load center.

Ignore the converter

Use the Inverter/Charger to charge the batteries.

You can also plug a generator into the shore-power input.

Battery output also goes to the 12V side of your load center.
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Old 03-07-2018, 06:54 PM   #8
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Thanks Steve
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