Proton-Proton fusion is missing solid hydrogen variant.
A vessel with hydrogen, liquid hydrogen, and solid hydrogen, and a reactor for p-p and one for p-p-p will function as expected until the hydrogen and liquid hydrogen is depleted.
When only solid hydrogen remains, the p-p-p reactor will continue operating but the p-p reactor will complain that there is no hydrogen remaining.
KSP 1.10.1.2939 KSPIE 1.25.31
Proton-Proton fusion is missing solid hydrogen variant.
A vessel with hydrogen, liquid hydrogen, and solid hydrogen, and a reactor for p-p and one for p-p-p will function as expected until the hydrogen and liquid hydrogen is depleted.
When only solid hydrogen remains, the p-p-p reactor will continue operating but the p-p reactor will complain that there is no hydrogen remaining.