I have a suggestion for a new type of cap booster charge which would be used with existing cap boosters.
These will be an empty container manufactured by usual means, and can be traded on the market. They will be reusable cap charges but will have a depletion system like laser crystals.
Players will be able to fill these with cap to create a new cap booster charge, by travelling to the sun and harvesting its energy.
A filled solar charge will not be able to be traded on the open market.
The primary target for this new charge is the explorer or nomad wishing to operate out in space for a long time .
EDIT: I thought of a better (more balanced) solar harvesting module…
The module would have no charges and instead hold a reserve of capacitor produced from the sun. When activated, you have a huge amount of cap (maybe infinite) for a limited amount of time. Once the cap has gone, the module is useless and you have to recharge at the sun.
The counter to this would be neutralisers, which would reduce the “time to depletion” count on the module. However, neuts only affect this module when the module is active.