Advanced solar and accumulators.

Tier 1 are the standard built-in solar panels and accumulators.
Each subsequent tier takes multiples of the previous tier objects, and produces or stores more energy.
This mod provides up to 4 levels of solar and accumulators: standard from the base game, advanced, elite, and ultimate.

This is based on previous mods:

Former Advanced Electric from Neomore for 0.14
Formerly UpgradedElectric from thurak126