This fuses are rated 200 amp. I installed for my inverter. The current was constantly monitored. At the first, no current at all, the inverter can't turn on. It took me several min to find out the fuse itself is not conducting. both of them had the same problem. I found out by sanding the contact plates, they became conductible. I might have been coated with some transparent material to make it look better, or by mistake.I inserted one of them to the fuse holder, t..