Geothermal with HV cables.
You might want to put an MV transformer before the Macerator, just to make sure that it does not receive above 128 EU/t.
If it still explodes, then it is an issue with the addon for sure.
EDIT: Immibis, can you please make the recipe for the Sharpened Iron Plate, use the Ore Dictionary name "plateIron" or something like that? Some of us use the Nerfs Galore mod (also known as GregTech), which forces all iron plates created in the world to be his plate, which is ore-dictionary registered as "plateIron" or something like that. Thank you.