As you're interested in modeling a PV-Hydrogen System, Simscape™ and Simscape Electrical provide model libraries for simulating hydrogen electrolyzers and PV array.
You can refer to the following MathWorks resources to model your own system:
- An example model that demonstrates a DC islanded microgrid, which provides power to an electrolyzer using a solar array and an energy storage system, can be found here: https://www.mathworks.com/help/sps/ug/green-hydrogen-microgrid.html
- About Hydrogen Hydrolyzers: https://www.mathworks.com/discovery/hydrogen-electrolyzer.html
- PV Array model in Simscape: https://www.mathworks.com/help/sps/powersys/ref/pvarray.html
- Electrolyzer model in Simscape: https://www.mathworks.com/help/sps/ref/electrolyzer.html
I hope this helps!