This contains the data and analysis scripts needed to reproduce the figures in the paper "Valuing maintenance strategies for fusion plants as part of a future electricity grid". It also contains extra data corresponding to all the runs performed, not all of which have data points displayed in the plots. These could be used for re-analyses. Data were created using the GenX capacity expansion and optimization code. We used a branch of GenX 0.3.6, modified to model fusion reactors. GenX is available at https://github.com/GenXProject/GenX and the specific versions used are achived below via Zenodo: Two branches of GenX were used: https://github.com/cfe316/GenX/tree/feature-fusion (for MedOppMaintenance-rev4) commit b35767788466ecc0077899fbe863568e26fa9784 https://doi.org/10.5281/zenodo.10607649 https://github.com/cfe316/GenX/tree/feature-fusion-maintenance-pairs (for MedOppMaintenance-rev5) commit 0ffe45f0fdc562b62111e772bfd47eb7b20860ac https://doi.org/10.5281/zenodo.10607696 GenX was run on Princeton's `della` cluster using Julia 1.6.7. Gurobi 9.5.2 was used as the optimizer for GenX. Files for Steps 1 and 2 are found at http://arks.princeton.edu/ark:/88435/dsp012j62s808w.