LETS ASSUME it take 10 EUt... this means, by 100000 storage, it would take 10000 ticks = ~5.5 minutes to charge up.
To mention the obvious, i don't think you have a clue of charging rates :O
Either way, higher tier equipment DOES have longer charging times then normal equipment. Whereas the storage increases x10 with each tier, charging rate usually only raises by x2-4, causing a increased recharge time of ~x2.5
This is an intended factor.
ok SORRY 20EU/t is current... I wasn't exactly paying attention to the actual rate, but now it know its 20 EU/t so, that means that it would still take over 2 minutes to charge up...but with the lappack i guess it doesn't really matter.