Maybe it can go even beyond that, since the first time it happened the effect of eletricity on Mc seems to consistently be that it makes his flesh "grow without control", which means that his shapeshifting is being used, to activate transformations Mc has to use monster power, but it was never stated that Mc is using his power to transform when hit be eletricity, in fact it seems he has to do the opposite, use power to STOP his body from growing.
If this is the case then Mc is able to absorb eletricity and convert it into monster power, like Syla who used eletricity to make her ability stronger, the flesh exploding might be just consequence of lack of control, but maybe Mc can actually empower both body and memory powers like that.