Integrating a human urine based fuel cell and a hydrogen fuel cell with hydrogen source from PV electrolysis can be tried. The inclusion of a wind tree in the place of PV can be used to meet the power required for water splitting. This can practically meet the energy energy needs of small homes and offices.
I had a work on hybrid investment of PV, wind, and storage. The framework can also solve the optimal hybrid investment for more energy sources. Please feel free to let me know if you have any comments or questions.
Hao Wang and Jianwei Huang, ``Joint investment and operation of microgrid,'' IEEE Transactions on Smart Grid, 8(2), pp. 833-845, 2017.
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