perhaps a shield specialized in resisting electricity could be added, such as a shield covered with plastic or other insulating material, or having a metal plate that conducts electrical shock to a battery integrated into it (in short, a shield that absorbs electric discharge), you could even make the electricity absorbed recharge the battery or the integrated UPS and since they are 100% charged you can remove it or it would have an overload and could have several negative states, such as: the battery it becomes useless and can not be repaired / the shield suffers damage / you receive a varied electric shock / you can be lucky and nothing happens / among other states that occur to you, well that would be my point of view
or you could make an armor that repels a little more damage of any kind, something less than the power armor, it could be something difficult to build
could use plutonium cells, a portal generator, spiral stone, it could even need artifacts, so that its construction is somewhat complicated