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Open Roads Forum  >  Fifth-Wheels

 > Can a modified sine wave inverter damage rlectronics

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Posted: 03/23/20 08:49pm Link  |  Quote  |  Print  |  Notify Moderator

I have personally killed two Windows laptops with an MSW inverter.

I ran one of the laptops off the inverter for several days or weeks before the laptop died.

I had a backup laptop, different model from the same company, and it used to the same charger. I plugged the charger into Shore power, and charged my backup laptop with it. This killed the backup laptop. So the MSW inverter damaged the charger in some way that caused it to kill the second laptop.

My MSW inverter has a USB Jack that is active even when the inverter is switched off. I've used that to charge my phone a few times with no problem. Of course I don't know if doing it multiple times over time would be problematic.


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2chiefsRus

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Posted: 03/24/20 06:07am Link  |  Quote  |  Print  |  Notify Moderator

is it possible that not all MSW inverters are created equal?


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4x4ord

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Posted: 03/24/20 06:55am Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

I had a MSW Freedom 10 in to two boats and two trailers and never had a problem. Picked up a West Marine 1500 (AKA Freedom 15, which Heart Interface never marketed under their own label) and ran that for like 15 years on the last boat and never had a issue with anything running on it also. The Freedom units have great 4 stage battery chargers built in. They are worth it just for the charger.


That might be a good idea to keep the Xantrex for the battery charger and buy a cheap 2500 watt pure sine wave inverter to power the trailer.


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2oldman

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Posted: 03/24/20 07:34am Link  |  Quote  |  Print  |  Notify Moderator

4x4ord wrote:

and buy a cheap 2500 watt pure sine wave inverter to power the trailer.
Why do you advise cheap?

pianotuna

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Posted: 03/24/20 10:22am Link  |  Quote  |  Print  |  Notify Moderator

2chiefsRus wrote:

is it possible that not all MSW inverters are created equal?


Yes.

Ones that have a nice big heavy transformer tend to be better.

Small true sine wave under 400 watts have prices that went down like a stone.

My Favorite is the Victron. Sometimes on sale for $80.


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4x4ord

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Posted: 03/24/20 01:23pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

4x4ord wrote:

and buy a cheap 2500 watt pure sine wave inverter to power the trailer.
Why do you advise cheap?


I'm just meaning I can purchase a stand alone pure sine wave inverter for much less than the cost of replacing my Xantrex inverter/charger.

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Posted: 03/24/20 06:04pm Link  |  Quote  |  Print  |  Notify Moderator

I will always recommend separate components for inverter, charger, transfer switch.


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