Quote:
Originally Posted by Matsu
... depending on the size of install and whether one seeks to power everything, or just offset a portion of their average use. Even with net metering (in Ontario, Canada) I'm not sure it works out in my favor yet. Considering weather factors, required back-up capacity, roof size/pitch, etc...
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I'm here in northern Germany at about the same latitude than Calgary. From my experiences with our rather small (5.76kW peak) setup, we are almost fully autonomous in summer, but in winter time with cloudy weather and short days, we have days with much less than 10% self sufficiency (on average more in the 20-30% range). Being fully self-sufficient might work in very sunny areas which are closer to the equator, but the farther away and therefore the greater the daytime differences between the seasons are, solar power as single source gets less economical.