Year round renewable energy?

[Tarrel]

Adapting to low-energy living is a good start. If you think about the "game-changing" electrical applications, lighting has to come out streets ahead of anything else, followed, IMHO, by refrigeration. Both of these are achievable with relatively low levels of energy use. (Especially if you convert a chest freezer to run as a fridge).

Solar and wind are fairly complementary to each other. Solar is stronger in summer and wind in winter. Obviously there are the exceptions, such as a prolonged high pressure spell in the winter, when little wind will be combined with the short days / long nights of winter. However, at that time of year, the more power-hungry of the "game-changer" applications (refrigeration) will be less important. Being frugal with energy use plus a decent battery bank should tide you over any periods of "no wind / no sun".

In emergency there's always a generator, though the OP did frame the question as "year round renewable energy".

I read an article once looking at the idea of capturing rainwater on a roof and then letting it gush down through a pipe, turning a micro turbine on the way. The general critique was that there wouldn't be enough stored energy in the water on the roof to achieve very much.*

Although, having just done a rough calculation:
Say you had 1000 litres up there. That's 1000kg. So, assuming the roof is 5m above ground, the stored energy is 1000 x 5 x 9.81 = 49,050J. Assume you're going to lose half of it in losses due to friction, etc, leaves roughly 25,000J, which is the equivalent of 6.9kWh. That would keep your LED lighting and a very efficient fridge running for a few days.

You could use such a system for pumped storage, so the roof tank is filled by a combination of rainwater falling on the roof and water being pumped up there using surplus solar / wind energy when available. Such a system would also give you additional emergency water storage.