Solar and wind fail at different times, which is precisely why they work well together. Add storage and the combination stops being a set of intermittent sources and starts behaving like something a plant can plan around.
Beyond a point, additional solar produces surplus at midday and nothing in the evening. Combining sources and adding storage addresses the shape of supply, not just its volume.
Not usually. Sharing one evacuation point across sources tends to raise utilisation of an existing connection rather than require a bigger one.
The site wind and solar resource, its load profile and its connection constraints. The mix follows from those rather than from a standard ratio.
Tell us the site, the load and the constraint you are working against, and we will tell you what is realistic.
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