rin67630
Solar Addict
No.MPPT charger has a DC output. The direct water heater has a square wave output. The MPPT tracking here is to have such a duty cycle on the transistor, that the capacitor voltage * duty cycle has the highest value. Or something like that. I haven't thought much about the math behind it, but the idea is kind of clear.
A real MPPT needs a way to convert the input couple current/voltage into another couple current/voltage so to get more current at the output, that you have got at the input.
Only chopping PWM, without storage in a coil, will never permit this.
You will always be limited to the maximum current that your panels can deliver.
You will imperatively need a MPP voltage of the panel system to be close to the voltage of the boiler to get acceptable results.
On the other side, having an overall efficiency of 20% with a real MPPT or having an overall efficiency of 18% without won't make so much difference neither.
It will always be much worse, than vacuum tubes.
Another thing to clarify is: does the square output have a null mean value to eliminate galvanic problems?
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