Using your solar setup for Bitcoin mining could be a smart move, especially with your free energy. With a stable output of 3 kW in winter and up to 100 kW in summer, you’ve got a solid foundation for mining. Investing in efficient ASIC miners can improve your ROI, though Bitcoin's price fluctuations are always a factor to consider. Since energy is your main expense in mining, your setup minimizes this risk.

If you'd rather not manage the equipment directly, cloud mining could be an option, letting you buy contracts and earn from mining without handling hardware. Just make sure to pick a reputable provider if you go this route.