RV.Net Open Roads Forum: Should I upgrade to a Magnum 3012RV inverter/charger

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

 > Should I upgrade to a Magnum 3012RV inverter/charger

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Sponsored By:
3 tons

NV.

Senior Member

Joined: 03/13/2009

View Profile


Offline
Posted: 12/08/21 07:08pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

For high wattage usage like a/c I suggest going to a higher voltage. At 12v, hundreds of amps can heat things up.


True with FWC’s (depending on cabling bottlenecks) but from my own air conditioner experience, mitigated by switching to LFP - negligible voltage sag - JMO

Respectfully,

3 tons

Itinerant1

Itinerant

Senior Member

Joined: 05/23/2017

View Profile



Posted: 12/08/21 08:55pm Link  |  Quote  |  Print  |  Notify Moderator

I've used the Magnum 3012 hybrid everyday for the past 5.5 years now with no issues. You will need to add a micro-air easy start to the air conditioner or the inverter will throw a fault and be hit and miss.


12v 500ah (5,120Wh usable), 20 cells_ 4s5p (GBS LFMP battery system). 8 CTI 160 watt panels (1,280 watts)2s4p,Panels mounted flat. Magnum PT100 SCC, Magnum 3012 hybrid inverter, ME-ARC 50. Installed 4/2016 been on 24/7/365, daily 35-45% DOD 2,000+ cycles.

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 12/08/21 09:32pm Link  |  Quote  |  Print  |  Notify Moderator

I can't imagine the 3012 will have any issues running the air or microwave unless you create some odd extreme issue.
Air could be an issue depending if there is a good start cap already in place. No harm to try once and see. Will need a significant battery full on charge to run more than an hour.


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

pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 12/08/21 11:31pm Link  |  Quote  |  Print  |  Notify Moderator

When my 3012 Magnum burned up I was told by the tech support folks that they did not recommend powering an air conditioner with the unit. They suggested the 4024 (iirc).

The issue was simple. The cooling fans require 120 volts to operate. I do not know if that is the control circuit or the fans themselves. So after running a heavy load do NOT turn off the inverter. My RV has scorch marks on the wall above where the inverter lives.

They did replace it, as it was under warranty.

I'd recommend Victron or Outback.

I'd recommend jumping to 24 or 48 volts.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

MNRon

Tennessee

Senior Member

Joined: 08/18/2007

View Profile



Good Sam RV Club Member

Offline
Posted: 12/09/21 12:50pm Link  |  Quote  |  Print  |  Notify Moderator

Groover - You might be referring to a thread or two I had earlier this year regarding a Magnum 3012 hybrid inverter and AC. To summarize what I've learned:
1 - Magnum 3012 hybrid is GREAT for augmenting power when you're on 30A shore
2 - Magnum 3012 hybrid is a good, solid inverter
3 - Magnum 3012 will support heavy loads well, but extended drawing hundreds of amps WILL heat things up and shouldn't be done. A few minutes for a microwave, hair dryer, etc isn't an issue. The Magnum will easily start my AC (without soft-starts) but you pull hundreds of Amps and cabling etc heat up if you do that very long
4 - The issue I experienced with the Magnum and AC's was not when running from the inverter, or shore power, but the Magnum power-qualifing circuitry will not reliably pass through portable generator power because of the generator's inability to keep voltage up cleanly at AC start. By playing around with various settings etc I was able to fairly reliably power one 15k AC from a Westinghouse i4500 at about 5000 elevation when it was 100+ outside without a softstart. With that said, I've ordered a micro-air so that it's not so fussy in the future.
5 - Regarding the AC issue with pass-through power from a generator: Magnum's "best" advice on this is to use a generator at least twice the inverter capability (ie - 6.5k genny with a 3012 - NOT HELPFUL). My understanding is that the Victron unit has a 'lock out' setting you can use when just passing power through so that it's qualification circuitry doesn't get in the way, I don't have first hand knowledge on this though.

Depending on your usage, upgrading the Magnum may, or may not, be a good idea. I upgraded from a Magnum 2800 and am glad I did for the hybrid capability. I would NOT plan on running an AC from 12v power due to the high current load. The generator interaction issue has been frustrating, if I had to do it over I'd look hard at the Victron but am not sorry with the setup I have.


Ron & Pat
2022 F350 Lariat CCSB SRW Diesel
2019 VanLeigh Vilano 320 GK

pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 12/09/21 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

Groover,

I sent you a private message.

Itinerant1

Itinerant

Senior Member

Joined: 05/23/2017

View Profile



Posted: 12/09/21 02:39pm Link  |  Quote  |  Print  |  Notify Moderator

Maybe placement of the unit makes a difference. I've run the microwave drawing near 150a plus my other misc loads nearing 165-175a for 45 minute. This past spring, summer daily running the 15k A/C unit for 3 hours off of solar/ batteries then switching over to the eu2200i for many hours after that. I do leave the top portion of my front compartment open to vent the hot air out from the inverter.

My personal experience with 1,883 days of boondocking use has been great with Magnum equipment especially after adding the easy start to the air conditioner. Even charging the batteries is easy with the eu2200i, set the incoming loadshare to 15a and the batteries are charging at 100a. SOC right now is 38% in 3 hours 60% will be replaced in the batteries for 98% SOC maybe tomorrow will be a better solar production day.

2oldman

NM

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 12/09/21 04:31pm Link  |  Quote  |  Print  |  Notify Moderator

MNRon wrote:

3 - Magnum 3012 will support heavy loads well, but extended drawing hundreds of amps WILL heat things up and shouldn't be done. A few minutes for a microwave, hair dryer, etc isn't an issue. The Magnum will easily start my AC (without soft-starts) but you pull hundreds of Amps and cabling etc heat up if you do that very long.
This was my experience also in my lead -acid 12v days.

My cabling was all 4/0, big beefy connectors, no shortcuts on any of it. But after maybe 3-5 minutes of microwave use, or especially a/c, things started getting hot, including the batteries themselves. That was the time I decided to up the voltage so I didn't have hundreds of amps to deal with.

pianotuna

Regina, SK, Canada

Senior Member

Joined: 12/18/2004

View Profile


Offline
Posted: 12/09/21 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

The 3012 tops out at 127 amps of dc charging (nominally 12 volts). After that, it falls over.

I think may be an indication the charger design was intended to work well with a 15 amp shore power supply.

Ivylog

Blairsville, GA and WPB, FL.

Senior Member

Joined: 06/30/2004

View Profile


Offline
Posted: 12/09/21 06:19pm Link  |  Quote  |  Print  |  Notify Moderator

I’ve had both…2012 & 3012 and the 3012 is heads and shoulders above. You are lucky to get 65 amps charging from a 2012 on generator power while my 3012 cranks out 150+ amps.
I don’t understand running AC off of batteries when a generator will do it easily plus charge the batteries. YES it can be done but at some point you have to recharge the batterie’s either with lots of solar $$$ or a generator/alternator.
Using the engine alternator to run a AC that draws 14 amps AC… 170A DC is going to overheat it and the inverter. Anytime I’m using a high amp item, I crank the generator unless quite hours prohibit.


This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
Upgraded with a 08 HR Navigator 45’...


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > Should I upgrade to a Magnum 3012RV inverter/charger
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.