A convenient solution would be to overcome wind and sun's intermittence by storing the energy and then dispensing it later, on windless or overcast days.
From the online.wsj.com
Men with signs of BPH may experience LUTS, such as urinary frequency, urgency, intermittence, nocturia, straining, incomplete emptying or a weak urinary stream.
From the sciencedaily.com
This intermittence is far more awkward than the gracefully forecastable variations of a portfolio of photovoltaic or wind generators diversified by type and location.
From the economist.com
At the start, the company experienced different problems with the devices they provided, when their users experienced many disconnections and intermittence during conversations.
From the en.wikipedia.org
They offer narratives of belief, and novelistic narratives make real the ambiguity, the contradiction, the intermittence, even the absurdity and comic irrationality of our intellectual lives.
From the guardian.co.uk
More examples
The quality of being intermittent; subject to interruption or periodic stopping