Performance: If being fully charged, it could be used up to 6 days for continuous cloudy and rainy days.
The charge to an expense account is based on the assumption that the benefits from the expenditure will be used up in the current period.
Since consumption tends to grow more slowly than GDP, excess capacity can only be used up via yet more investment or exports.
It's actually simpler than it sounds — the scientists are developing a system that exploits sewage-loving bacteria to produce nitrous oxide, which can be used up by a rocket thruster.
