RV.Net Open Roads Forum: Tech Issues: Two inverters for 50 amp service

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Two inverters for 50 amp service

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 6  
Prev  |  Next
Sponsored By:
ktmrfs

Portland, Oregon

Senior Member

Joined: 06/22/2005

View Profile


Offline
Posted: 11/02/22 11:09am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

This is where I disagree. The 50A 120/240V circuit is single phase . The transformer secondary winding is center taped for the neutral and the current flows in the same direction in both halfs at a given point in time. And the neutral current is the difference of the two hot legs. The simple fact that it's a single transformer winding means that it's single phase.


I don't disagree, I'm not saying it is a 3 phase circuit, just that the currents in each leg (and also voltage) are phased 180 degrees with each other so if the current in the neutral is then the difference in current between the legs.


2011 Keystone Outback 295RE
2004 14' bikehauler with full living quarters
2015.5 Denali 4x4 CC/SB Duramax/Allison
2004.5 Silverado 4x4 CC/SB Duramax/Allison passed on to our Son!


Cptnvideo

Arizona - most of the time

Senior Member

Joined: 11/05/2006

View Profile


Offline
Posted: 11/02/22 06:08pm Link  |  Quote  |  Print  |  Notify Moderator

240 VAC is a center tapped transformer. And the 2 legs are 180° phased.
What I want to do does not involve a lot of current, So questions about being in or out of phase are moot.
We have 1600 watts of solar and 618 ah of LFP batteries and likely going to 824 ah in a couple months. And what we want to do is use some of that solar/battery power to augment what we get current wise when plugged into 15 of 20 amp service.
Load sharing (for those that don't already know). The IC Series GoPower inverters have a load sharing function. That allows the user to limit shore current (but only on Line 1) and any additional demand is made up by the batteries. (This is a great feature for anyone with solar and paying for metered electric at a RV park.)
The GoPower IC Series inverters have pass thru for 50 amps on each of 2 legs. BUT they only monitor and control current (load share) on Line 1 (which seems pretty dumb to me). So my plan is to replace our 3kw inverter with two 2kw inverters. line 1 to Line 1 (which is the monitored/controlled line) of one inverter, line 2 to line 1 of the 2nd inverter.
When we are plugged into a 15/20 amp source, we want to ability to use a few additional amps if we want to. In other words, about 60 to 100 ah out of the batteries. So the inverters would pass thru about 80% of 15 or 20 amps and produce a few more amps from the batteries.
I hope this clears things up. Cost is not an issue, looking for convenience. And using some of that excess solar power on a hot afternoon day.
BTW, in response to the 50 amps on the neutral - when we are plugged into 50 amp service, the inverters would be in full pass thru.


Bill & Linda
Arizona
2019 Dodge Ram Laramie 3500 dually 4x4 diesel
Hensley Trailer Saver BD5 hitch
2022 Grand Design Solitude 378MBS
1600 watts solar, 3kw inverter/charger, 3 206AH LiFePo4 batteries

StirCrazy

Kamloops, BC, Canada

Senior Member

Joined: 07/16/2003

View Profile



Posted: 11/02/22 06:22pm Link  |  Quote  |  Print  |  Notify Moderator

My qyestion is why? why not buy one inverter big enough to run what you want to run and use a transfer switch and it will power everything in the RV.


2014 F350 6.7 Platinum
2016 Cougar 330RBK
1991 Slumberqueen WS100

Cptnvideo

Arizona - most of the time

Senior Member

Joined: 11/05/2006

View Profile


Offline
Posted: 11/02/22 06:29pm Link  |  Quote  |  Print  |  Notify Moderator

StirCrazy wrote:

My qyestion is why? why not buy one inverter big enough to run what you want to run and use a transfer switch and it will power everything in the RV.


I already have that. But it doesn't have monitor and control of Line 2 like I want.

Cptnvideo

Arizona - most of the time

Senior Member

Joined: 11/05/2006

View Profile


Offline
Posted: 11/15/22 05:03pm Link  |  Quote  |  Print  |  Notify Moderator

Wa8yxm mentioned the Progressive Industries HW-50C (hard wired surge protection) WITH REMOTE. I decided to look into it.
Well, I purchased one, installed it and I couldn't be happier. It indeed monitors and displays the current on each line.

GoPower confirmed that my IC3000 only monitors and controls current on line 1 (which I find to be a poor design since the inverter passes and/or feeds both lines of 50 amp service).

So now if I'm plugged into 15, 20 or 30 amp service and want to use more than the supplied current (load share using solar & batteries), I can monitor the current draw on Line 2 and subtract that amount from the shore breaker size. That would be the amount that I would limit Line 1 to.

Problem solved and I am no longer interested in replacing my 3000 watt inverter with 2 2000 watt units.

wa8yxm

Davison Michigan (East of Flint)

Senior Member

Joined: 07/04/2006

View Profile


Offline
Posted: 11/16/22 04:41am Link  |  Quote  |  Print  |  Notify Moderator

Cptnvideo wrote:

Wa8yxm mentioned the Progressive Industries HW-50C (hard wired surge protection) WITH REMOTE. I decided to look into it.
Well, I purchased one, installed it and I couldn't be happier. It indeed monitors and displays the current on each line.


And you are welcome... Thanks for letting us know how you resolved it as well That product (The HW-50C) can save you a lot of grief in other ways as well.


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


Cptnvideo

Arizona - most of the time

Senior Member

Joined: 11/05/2006

View Profile


Offline
Posted: 11/16/22 08:36am Link  |  Quote  |  Print  |  Notify Moderator

Yessir, it is a nice product well worth the price when protection is considered. Reviews were interesting with some of the voltage issues discovered at CGs. Wrestling with the 6 ga wire within the small box was a lot of fun. I did as much prepping of the wire as I could outside of the RV before crawling into the space where the transfer switch was located.
Thanks again for the information.

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 11/16/22 11:31am Link  |  Quote  |  Print  |  Notify Moderator

Get a single 6kW inverter and feed both sides. Probably need 48v battery. No need to make it complicated.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

Cptnvideo

Arizona - most of the time

Senior Member

Joined: 11/05/2006

View Profile


Offline
Posted: 11/16/22 01:21pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Get a single 6kW inverter and feed both sides. Probably need 48v battery. No need to make it complicated.


What?? Why?? I don't think you read the various posts, just jumped in to comment.
I have repeatedly said I simply wanted 2 inverters so that I could control load sharing on both lines of a 50 amp RV.

I still can't control load sharing on Line 2, but I now know how much Line 2 is drawing so I can compensate.

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 11/16/22 01:46pm Link  |  Quote  |  Print  |  Notify Moderator

What? Why are you load controlling? Just feed the beast.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 6  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > Two inverters for 50 amp service
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2022 CWI, Inc. © 2022 Good Sam Enterprises, LLC. All Rights Reserved.