MPP lvx6048. High or low frequency

@Will Prowse posted a video a while back... He did a review on the LVX 6048


Other than the high idle consumption he seemed to give it pretty high marks and he reported that it was a low frequency inverter

However I'm confused because a lot of people are now suggesting that it is in fact a high frequency inverter

So what's the truth? The internal construction certainly looks like a low frequency inverter... And the grand scheme of things if it is in fact a high frequency inverter then the price tag is pretty darn high all things considered

Yeah it's more of a hf with a transformer. Somewhat of a hybrid. Performance is similar to LF inverter for inductive loads. You can start some pretty big well pumps with this unit. If you don't have large inductive loads, stick with another one. It's a pain to mount due to it's weight.

I have two of them. They are high frequency with a big transformer. I haven't been able to throw anything at either of them yet that they couldn't run (1.5, 2.5 ton AC, microwave, vacuum, shop vac, griddle, coffee maker, etc.).

Downside is they are noisy, very noisy. I have them in an insulated mechanical room, and I can hear them through the walls at idle. The transformers hum and when the power demand picks up (or you dump a ton of solar into them) the fans spin up and sound like a jet trying to take off. I would not put these in a house or RV (or anywhere you are going to live) because of the noise. I have only been using mine for six months, and they have been rock solid, but I will eventually cycle them out to the garage in favor of something quieter.

Its high frequency, i checked with MPP solar. they say "it was tested to 2X with resistive loads in a lab but do not recommend going over 6K" see my other post regarding this unit. BTW i have 2 of them.

Will Prowse said:

Yeah it's more of a hf with a transformer. Somewhat of a hybrid. Performance is that ig a LF inverter for inductive loads. You can start some pretty big well pumps with this unit. If you don't have large inductive loads, stick with another one. It's a pain to mount due to it's weight.

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Well... I already bought it... Maybe I'll just run more crucial loads on it and run a few cheapy hf units for this like minisplits

This is for a 100% off grid cabin... I bought it as it could start heavy loads... But now I doubt I'll have big starting loads in the house...

ericfx1984 said:

Well... I already bought it... Maybe I'll just run more crucial loads on it and run a few cheapy hf units for this like minisplits

This is for a 100% off grid cabin... I bought it as it could start heavy loads... But now I doubt I'll have big starting loads in the house...

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What is your biggest load

Will Prowse said:

What is your biggest load

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Maybe a 24000 BTU minisplit or a clothes dryer(though not at the same time)

Everything else is some laptops, a small TV, hifi stereo... Ham radio gear, lights and other miscellaneous stuff...

We've been getting by in a very energy and efficient RV with just 3,000 Watts and we've never tapped that so I don't imagine an extremely well insulated house that's built specifically for this will really need much more power than that

Its basically a high voltage 400Vdc to 240Vac inverter with auto transformer built in for split phase. I think its a misnomer to call it a high frequency inverter and the type with 27V to 120/240 step up transformer (like Schenider XW6848) a low frequency inverter. Both topologies use high PWM switching frequency to form sine waveform and 50/60hz commutation on the other half of H-bridge for polarity switching. I think more accurate name is high or low voltage inverter.

AntronX said:

Its basically a high voltage 400Vdc to 240Vac inverter with auto transformer built in for split phase. I think its a misnomer to call it a high frequency inverter and the type with 27V to 120/240 step up transformer (like Schenider XW6848) a low frequency inverter. Both topologies use high PWM switching frequency to form sine waveform and 50/60hz commutation on the other half of H-bridge for polarity switching. I think more accurate name is high or low voltage inverter.

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400vdc?

ericfx1984 said:

400vdc?

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48Vdc > 400Vdc > 240Vac or DC-DC-AC. Topology of "high frequency" inverter.
48Vdc > 27Vac > 120/240Vac or DC-AC-AC as in "low frequency" inverter.
PWM switching frequency is about the same in both types, around 16 - 23kHz.

AntronX said:

48Vdc > 400Vdc > 240Vac or DC-DC-AC. Topology of "high frequency" inverter.
48Vdc > 27Vac > 120/240Vac or DC-AC-AC as in "low frequency" inverter.
PWM switching frequency is about the same in both types, around 16 - 23kHz.

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I'm following you now

I own 5 LVX6048 in an offgrid application running mini splits, and have had No luck getting them to work in parallel mode for more than 24hrs before I get a fault. Does anyone have them running dependably in parallel mode. I have 2 locations that I have tried running in pairs but both location are not solid so I have split the load and run them in stand alone mode, which seems to work. I question the application of running the max number as they are very battery voltage sensitive and if not all reading the same battery voltage it will fault. Anyone have them running in parallel?