Installing a DC-DC Converter (aka alternator charger or DC-DC Charger)

KurtW said:
Since the AC is rectified into DC I am not worried about the LiFePo4 batteries, rather the electronics that convert the AC to DC. Every power station manufacturer will tell you not to plug it into a modified sine wave inverter because the modified sine wave may damage the electronics. I've got a similar Fniri unit arriving Sunday and will be checking out the inverter waveform and noise. I'd rather spend a little money on a DC to DC charger than risk destroying expensive portable power stations.
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Can't take a sine wave vs square wave at the same voltage and frequency = low end cheap component min design.
Same for same a square wave is more wattage or power vs a sinusoidal wave. The square wave is al harder on power components, on and off more abruptly. Steep wave front.
 
PACruiser said:
Are we over thinking this issue? The latest portable power banks are designed to be plugged into standard AC wall outlets in pass through mode or to act as a UPS. How many of those outlets have pure sine wave output?

An alternator charger is certainly nice to have as another and possibly simultaneous power input. However, unless you are permanently charging the power bank through the LC, I wonder if the alternator charger is worth the expense and effort? Is it wise to add another tap off the hybrid system if not absolutely necessary? Also, keep in mind the Ecoflow alternator charger is max 800 watts which is roughly 1/3 the max charging rate of the LC inverter.

Overall, I really like the alternator chargers in general. Just raising questions.
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US grid power provides a pure sine wave, unless there are distortions from equipment or other issues.

Are we overthinking it - perhaps. However when it comes to expensive equipment that isn't designed for abuse I'd rather overthink, overplan and overtest.
 
KurtW said:
US grid power provides a pure sine wave, unless there are distortions from equipment or other issues.

Are we overthinking it - perhaps. However when it comes to expensive equipment that isn't designed for abuse I'd rather overthink, overplan and overtest.
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The loads create the problems not inherent to the grid sourced power.
 
There are some glitches after it crosses zero but the rest of the curve is pretty smooth.

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Area 51 said:
The loads create the problems not inherent to the grid sourced power.
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Yeah, to this point, the total voltage swing on the Land Cruiser's outlet with no load was just a little higher than at a wall outlet. It would be interesting to see what it looks like with a load on it. Hmm maybe I'll have to go boil some water.
 
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