Magnum Hybrid Inverters

Hi,

I wish Victron had a straight inverter rather than inverter chargers.

smkettner wrote:
Why a dream? Victron 3kW $1,985 or Magnum 3kW $2,223
I would take the Victron any day.

$2000 for an inverter qualifies as a dream in my house. :B

Why a dream? Victron 3kW $1,985 or Magnum 3kW $2,223
I would take the Victron any day.

Unyalli wrote:
Not to downplay Magnum at all but this tech has existed in the Victron Multiplus inverters for a while.

Jeff

The Victron is a "dream" inverter for most of us here. :)

Unyalli wrote:
http://www.donrowe.com/inverters/msh_m_series.html

http://www.donrowe.com/inverters/msh_m_series.html

Not to downplay Magnum at all but this tech has existed in the Victron Multiplus inverters for a while.

Jeff

That is so nifty! Congratulations on a really fine job of meeting that need.

Thanks very much for that info Gary!!! Great stuff!

Magnum has shipped 24v models so they are available for sale. There are two models currently available MSH4024M is the mobile version, ground switching, single pole 60A relay, 120 Vac output.

The MSH4024RE has no ground switching, dual inputs, one generator @ 60A and one grid input @ 60A.

There is one 12v model MSH3012M which has the same features as the MSH4024M above in 12v and as mentioned hopefully available in August. There is a parts shortage of one of the 12v components used exclusively in the this model.

All the MS and MSH model sync with the incoming ac waveform before they transfer to make sure the loads stay on the same phase during transfer and will stay synced until they hit the low voltage dropout setting.

The way all the MSH models load support is by monitoring ac input current. When the shore (or grid input) amp setting is reached the inverter will automatically start to pull current from the batteries and add to the input current. In some cases it may help hold up the voltage depending on the source. If the source is grid then there is no way a 4kw inverter and some batteries are going to raise the voltage on the whole grid, if it could we wouldn't need substations on the grid.

If the source is a small generator then it may help stabilize the voltage but remember the inverter is always synced to the incoming waveform and it will try to follow that waveform as long as it stays connected. The way it can help a generator and the way the Trace SW series helped (it could not raise the voltage either) was it will load support and try to take some load off the generator in hopes the generator can pick up its voltage running less load.

The MSH will continue to Load Support until it reaches .5 VDC above the inverter Low Battery Cutout setting. It will then return to charge mode to bring the batteries up to charge.

I hope this helps,

Gary

The boost circuit is basically a copy of the Trace 2500, 4024 technology of the early nineties. When the LOAD side of the AC is online, when powered by a pass through AC source, it detects the sag of voltage which has a specific threshold It stops charging maintaining the batteries and goes into inverter only mode. The inverter "synchs" with the incoming AC power and raises AC output voltage to a specified level. This "boost" has to have a default timer built in to avoid constantly draining a battery bank because of an continuously insufficient AC power supply source. The "boost" could be enabled in as little as 30 ms or as much as 70 ms. We'll have to wait and see. A 15-second boost assist window should be plenty to allow motor start assist. With new style software maybe the boost assist could be repetitive a few times then default. Pure guesswork on my part.

I like the 60 amp transfer relay a lot more than the Trace 30-amp relay on the 2500 series machines.

But shorepower 50-amp is 240 volts divided in half with a neutral. You cannot "combine" them and remain plugged in unless you do some serious rewiring and use a transformer. It would take a four pole double throw 60 amp relay to allow passage of all the 50 amp shore power current through the RELAY. One half of which could go through the inverter. Don't forget neutral is involved.

Unless Magnum did some fancy MOSFET footwork, Pure sine wave inverters don't play nice with modified sine wave inverters.