Firstly If you want to get into power/electrical side of it I think it would be better to do a masters in electrical power systems they mostly cover renewable energy. You are limiting your career choices by going straight into renewable energy. Other option would be you actually getting a job with your EEE degree in this sector and then ask for your employer to cover your MSc.
Also, as far as I know Imperial does not offer part time mode for the courses that you mentioned otherwise it would be the best choice. There are not too many MSc programmes in UK with criteria you want and it seems that University of Strathclyde's Sustainable Engineering: Renewable Energy Systems & the Environment (MSc) is your best option. They are very strong in power and electrical engineering but I have no experience with them.
Try to look at online masters from reputable universities abroad and see what is their criteria for funding.