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Open Roads Forum  >  Tech Issues

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

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Itinerant1

Itinerant

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Posted: 12/09/21 06:27pm Link  |  Quote  |  Print  |  Notify Moderator

Are you sure it was 150a+, 125a is max or atleast I ever saw.

[image]


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.

pianotuna

Regina, SK, Canada

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Posted: 12/09/21 08:40pm Link  |  Quote  |  Print  |  Notify Moderator

Interesting that my 3012 puts out 127 before it rolls over. I wonder if the temperature had anything to do with that. It was below freezing--but I did not note the actual conditions.


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.

Groover

Pulaski, TN

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Posted: 12/10/21 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

MNRon wrote:

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.


Thanks to you and several others for the good information.

The ability to run on a 30A (or less) circuit or even intermittently from the battery is what I am looking for. My coach has 6000W Onan inverter generator built in which I will crank up if I expect to need the air conditioner more than 20 minutes or so. I do already have a soft start on the air conditioner that I would be using. To run both AC units I would definitely crank the generator.

The Victron unit does not appear to be able to put out 3000W, especially in warmer weather. That would leave me a bit concerned.

Victron specs

pianotuna

Regina, SK, Canada

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Posted: 12/10/21 03:44pm Link  |  Quote  |  Print  |  Notify Moderator

The Magnum is 3000 VA just as is the Victron. Outback has a sealed unit that is 2800 VA and a vented model that is iirc 3000 VA.

MNRon

Tennessee

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Posted: 12/10/21 06:32pm Link  |  Quote  |  Print  |  Notify Moderator

Groover - given you have soft starts and an onboard 6kW generator, I doubt you would experience the AC generator-inverter pass through power I faced; I’m pretty sure that either the Magnum or Victron will fill your need. If you desire the easy swap out from your current 2012 to a 3012 I wouldn’t be afraid of it, and you will certainly like the boost capability if you camp with 30A hookups very much. Not to recommend against the Magnum, but just to complicate your decision making [emoticon] Victron has a really cool GUI that I like for power management visibility, but they’re pretty proud of it (costs quite a bit more than Magnums ARC controller) - as pianotuna says, the Victron and Magnum will both have similar performance.


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

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Posted: 12/12/21 12:05am Link  |  Quote  |  Print  |  Notify Moderator

Regardless of inverter’s settings, Qualifying generator power (honda 2200i) while in eco mode was pretty much a no-go for my pass-thru Pro-sine 2.0 (non-hybrid) inverter, and caused me so much consternation that I ended up simply bypassing inverter output by adding another corded ATS switch just ahead of the air conditioner… New ATS defaults to generator (this corded ATS for ‘eco-mode’ only), otherwise 11kbtu air conditioner (with soft-start) will run without a hitch supplied by pass-thru inverter, shore or generator (in regular generator mode)…

What’s most interesting is that when off-grid, the inverter will run everything EXCEPT the air conditioner, while simultaneously the genny (via corded ATS) gets dedicated for the air conditioner only - if it happens to run outta gas, the ATS switches to allow the inverter to seamlessly take over the air conditioner load as well as the other loads…

3 tons

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