These sorts of Mana reactors are a Guraldian  invention.

The largest reactor is the Edison reactor .

A small amount of Mana  is put into a small container, then left to grow for some time.

Base mana is sometimes extracted from Mochite, and sometimes generated by other mana reactors.

It is let to grow, and then used as energy storage. 

Different mana reactors have different amounts of mana, but all are very efficient.

The best mana reactors utilize the property of mana where if there is not enough energy, matter can be summoned, and can generate huge amounts of energy in a amount of time less than a second.

The only downside is that mana reactors MUST stay on.

Sometimes, small blobs of Darkness are found in mana reactors.

Small 'mochite ports' are sometimes found on old mana reactors.

When being used a wire is attached to the tubes of the reactor.

The tubes in a mana reactor have suction, mainly to cycle around mana.

Some mana reactors have differing suction