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rickhise

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Posted: 07/07/19 09:55pm Link  |  Quote  |  Print  |  Notify Moderator

Seriously considering switching to Magnum
after 10 plus years with xantrex 2000
Modified sine

To a Magnum 2812. I have a bank of 6 inter state wet cell 6 volt golf cart
Batts. Your thought s

pianotuna

Regina, SK, Canada

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Posted: 07/07/19 10:37pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

I have the Magnum 3012 hybrid.

I'd look at Outback, and Victron. (i.e. I would not buy a Magnum, should mine
fail again). I would definitely want the hybrid feature, in any unit I purchased.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

rickhise

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Posted: 07/08/19 05:15am Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

Hi,

I have the Magnum 3012 hybrid.

I'd look at Outback, and Victron. (i.e. I would not buy a Magnum, should mine
fail again). I would definitely want the hybrid feature, in any unit I purchased.


I’m listening

what is hybrid feature
How old is your Magnum
What about the Magnum u don’t like
Thanks

GordonThree

Northern Michigan

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Posted: 07/08/19 06:01am Link  |  Quote  |  Print  |  Notify Moderator

I have the 2812, and while it works well, I would not buy it again. Mine is six years old at this point.

Mainly my gripe is 12v. I should have studied more and went with a higher voltage on the battery bank. The biggest issue is the difference between full and "empty". On a 12v system that's only 0.8 volts, not much margin. On a 48v system you have 3.2 volt difference to work with.

Also like Don said, no hybrid mode on the 2812, the 3012 is the newer model with the load support feature. Load support lets you run heavy loads on a small generator or weak shore power connection. It uses battery to supplement amps.

Victron has more bells and whistles, not sure what improvements they offer.


2013 KZ Sportsmen Classic 200, 20 ft TT
2017 Ram 2500 4x4, 6.4 HEMI, 4.10 / Auto

rickhise

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Posted: 07/08/19 07:27am Link  |  Quote  |  Print  |  Notify Moderator

What is hybrid mod mean. Thanks

rickhise

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Posted: 07/08/19 07:30am Link  |  Quote  |  Print  |  Notify Moderator

GordonThree wrote:

I have the 2812, and while it works well, I would not buy it again. Mine is six years old at this point.

Mainly my gripe is 12v. I should have studied more and went with a higher voltage on the battery bank. The biggest issue is the difference between full and "empty". On a 12v system that's only 0.8 volts, not much margin. On a 48v system you have 3.2 volt difference to work with.

Also like Don said, no hybrid mode on the 2812, the 3012 is the newer model with the load support feature. Load support lets you run heavy loads on a small generator or weak shore power connection. It uses battery to supplement amps.

Victron has more bells and whistles, not sure what improvements they offer.

So the 3012. I’m missing something it’s 1/2 the cost of a 2812, is it just inverter no charger

pianotuna

Regina, SK, Canada

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Posted: 07/08/19 07:36am Link  |  Quote  |  Print  |  Notify Moderator

Hi,

What I like best is the hybrid load support feature. If you plug into shore power and have the (extra cost) remote, you can limit incoming amperage to prevent overloading the circuit. I generally run at 80% of what is available (24 amps on a 30 amp shore power supply).

For example. If I plug into a 15 amp circuit, I limit my demand to 12 amps. If I use more than that, with the load support feature active then I can still have the water heater and microwave running at the same time. The "extra" power is drawn from the battery bank. After the load drops, the Magnum recharges the battery bank.

What I like least, is a design error by Magnum. It has cooling fans. The fans shut down when the inverter is turned off. On one hot day, 2 years ago I had been using my generator (Yamaha 3000) and inverter together to run the roof air and make a late breakfast. The battery bank was "hungry" as I will NOT use the generator while sleeping. After lunch I turned off the air conditioner, shut down the inverter and turned off the generator, as I was going to be gone for a couple of hours.

When I returned, there were soot marks on the wall above the inverter. It had, because the cooling fans turn off, caught on fire. They are 120 volt fans.

There is no mention of this "feature" in the manual. I believe I was lucky my entire RV was not burned down.

To be fair, they did replace the unit under warranty.

Another dislike is on some gfci outlets, the Magnum causes the power to trip. This is totally random. At one location one plug would trip, and the other would not trip. I use a "patch board" approach so I can wire around the Magnum--but that defeats the purpose of having the load support feature. BTW load support is NOT voltage support.

In the old days when I had a 2500 watt inverter, I would sometimes do "double conversion". I'd plug ONLY the converter into shore power, and then plug the RV into the inverter. This worked quite well for me, especially on 15 amp shore power. However, the design of the Magnum has a HUGE inrush current, so the second the inverter is turned on, it blows the twin 30 amp reverse polarity fuses in the converter. That means I can't do double conversion as a "work around" when the Magnum is tripping gfci outlets, nor can I use the single dedicated 20 amp outlet that is only powered by the inverter. I have to "switch off" the converter to protect it, then use the outlet, turn off the inverter, and switch the converter back on.

Magnum does NOT recommend running the air conditioner from the inverter, which was something I wished to do. I was not aware of this for over a year after I had purchased the inverter.

If you wish to limit the charging current (my batteries recommend no more than 108 amps) the only way to do so on the Magnum, is to limit the incoming amperage. That is to say the least, annoying if you are on a 30 amp (or even on the 24 amps from the Yamaha generator). I heat 100% electrically, so turning down input amperage is something I avoid.

The Magnum does some "checking" before it passes through power. If the voltage is low, then a relay "clicks" and it waits for xxx seconds before it attempts to connect again. I had one cord where the tines on the male plug had heated. The Magnum would not allow the power through. I ended up replacing the end and then it worked.

In short, the Magnum, while a good product, has some foibles. I know from speaking to Victron owners that they have zero problems with gfci outlets.

If you still want a Magnum, then Imarine usually has the best price. Make sure to buy the top of the line remote to access all the features.


rickhise wrote:



I’m listening

what is hybrid feature
How old is your Magnum
What about the Magnum u don’t like
Thanks


* This post was last edited 07/08/19 11:58am by pianotuna *   View edit history

pianotuna

Regina, SK, Canada

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Posted: 07/08/19 07:39am Link  |  Quote  |  Print  |  Notify Moderator

Both the 3012 and 2800 are inverter chargers. The 3012 has an "extra" two hundred watts for you to play with and is a newer design. The company is foreign owned now.

If I were starting over, I'd jump to a 48 volt battery bank. I would go with Outback or Victron.

The load support feature is "to die for", but I wish it were 'voltage support', too. It is possible to "trick" the Magnum to do voltage support--but that may have damaged my Magnum. I have an autoformer now, so I no longer have that issue.

* This post was edited 07/08/19 07:45am by pianotuna *

GordonThree

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Posted: 07/08/19 07:48am Link  |  Quote  |  Print  |  Notify Moderator

rickhise wrote:

So the 3012. I’m missing something it’s 1/2 the cost of a 2812, is it just inverter no charger


That's a good deal if it's legit. The place I bought mine shows the 3012 several hundred more than the 2812.

theoldwizard1

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Posted: 07/08/19 07:58am Link  |  Quote  |  Print  |  Notify Moderator

What ever brand you chose, go with a PURE SINE WAVE inverter. You appliances will appreciate it !

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