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Solar Panel Wattage vs Size?


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Not being a Solar expert by any means (at all really) I was wondering why anyone would choose a smaller yield solar panel over a larger one given the same dimensions? What am I missing (except perhaps budget)?

Consulting my good friend Google I saw SunPower X-Series and E-Series panels have a 345W/327W panels with a great efficiency which is probably going to cost an arm and a leg. I have a future project (Grid Tied) with limited space and using the higher yield panels will produce the most power, right?

What other good panels can you recommend with a +-1.5m x 1m size? Anything outside of these dimensions won't fit two rows of 5 I have space for.

Ingo

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Ah, that is good information. As stated, the inverter will be grid-tied so battery voltage does not come in to the equation. Would the 'range' of the inverter refer to the nominal voltage? Values like MPP voltage range  from 200V - 800V and Nominal of 710V is what the datasheet says. Would it then be to get the panels matched  closely to 710V? From the datasheet 10 x SPR-E20-327 with Voc of 64.9V would be perfect?

SE_DS_Fronius_Primo_EN.pdf

ds-e20-series-327-residential-solar-panels.pdf

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On 2018/09/24 at 2:09 PM, Ingo said:

As stated, the inverter will be grid-tied so battery voltage does not come in to the equation.

I would look at the biggest wattage panels I could get. I saw 405w panels today.

Why? The higher the volts, the better the grid tied inverter works ... and you have less mounting structures. 

And new tech, for shading: https://us.sunpower.com/solar-panels-technology/p-series-solar-panels/

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That's what I thought as well. My limitation is space, then budget (wallet space :-)). 2m x 1m panels won't fit no matter what I do, it has to be as near as damn to 1.6m x 1m for me to fit 10 panels in to get +-3KW. Their E and X Series seems to fit one of my criteria but at a fairly large premium. The P Series would have been the choice was it not for size constraints.

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4 hours ago, Ingo said:

My limitation is space, then budget (wallet space :-)).

Two thoughts pop to mind:
1) Space - see what @Erastus did with his tracker.
2) I'm busy shopping around for prices like R4.85 ex VAT per watt. Need +-1kw more.

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