Hydrogen　by　electrolysis　with　solar　PV　and　nuclear　are　regarded　as　the　most　promising　zero‑carbon　hydrogen　production　technologies　to　replace　conventional　fossil-fuel-based　hydrogen　production　technologies.　This　study　evaluates　the　levelized　cost　of　hydrogen　(LCOH)　of　conventional　technologies　with　and　without　carbon　price,　solar　and　nuclear　electricity-based　technology,　and　the　nuclear　high　temperature　gas　cooled　reactor　(HTGR)　in　China,　and　analyzes　the　effects　of　energy　storage　on　the　LCOH　of　solar　electricity-to‑hydrogen　in　different　photovoltaic　resource　regions.　The　results　show　that　when　considering　carbon　price,　the　LCOH　of　conventional　technologies　will　rise　to　1938–2564　$/tH2　in　2050.　The　LCOH　of　HTGR　will　be　1149　$/tH2　in　2050,　much　lower　than　that　of　coal　gasification,　which　is　widely　used　in　China　today.　In　the　photovoltaic　resource-rich　region,　solar　PV　electrolysis　shows　strong　competitiveness,　particularly　for　PEM_PV,　whose　LCOH　could　reduce　to　1154　$/tH2　in　2050.　While　energy　storage　only　serves　solar　PV　electrolysis,　it　fails　to　increase　the　cost　competitiveness　of　solar　PEM.　Therefore,　zero　carbon　hydrogen　could　have　cost　advantage　by　2040　in　rich　photovoltaic　resource　area　and　by　HTGR.　©　2023