Depends on the cloud. Where I live I routinely get 50% generation on a "cloudy" day.

On a rainy day that drops closer to 20%.

As an aside - cloudy days avoid a problem I have with shade. In winter, at 3:30pm, the sun goes behind a tree and my production plummets to near zero. If there's cloud cover the sunlight is far more dispersed and there's no "shade".

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andsoitis 2 hours ago | parent [-]

> On a rainy day that drops closer to 20%

And you’re still able to power your entire home? What if the rain lasts for a few days, which is pretty common in many places.

	▲	bruce511 2 hours ago \| parent [-]
		No, 20% is not sufficient to power the home. I'm still attached to the grid and use grid power even solar is too low.