Hey Bob,

It may not be that a modified square wave is causing the problem but rather 
your MSW. At 20 years old, I bet you have ringing on the waveform of your 
inverter (voltage overshoot during switching). Look at it with a scope. I have 
seen 10-12 year old inverters hitting 300+ volts PP on the spikes. Some 
equipment will see that voltage and prevent operation and other equipment will 
hum along (pun intended) blissfully. 

We have had a couple of problems with magnum inverters working with specific 
loads. It would be best to test one before committing to it. 

Larry Crutcher
Starlight Solar Power Systems





On Apr 23, 2018, at 11:33 AM, RE Ellison <[email protected]> wrote:

I have a customer with a 20-year-old modified sine wave inverter that has been 
no issue at all until recently when he arrived from New York City with his 
Chevy bolt

Obviously the Bolt will not tolerate the modified sine wave and we’re 
discussing upgrading and we were wondering if the magnum inverter charger would 
work in this situation? 

Thought that I would check with the knowledge base !

Thanks
Bob Ellison

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