If you're going to the extent of getting the fish out and getting an inverter, why not just put the fish in a 5g bucket and tank the whole tank with you? 14g doesn't weigh that much. Just don't get in an accident. That would be bad.
My tanks: 120 Reef w/L2 Algae Scrubber, 60 Reef Pond w/floating Algae Scrubber, 40 Breeder Reef w/L2 UAS Tester Algae Scrubber
I maintain: 144 SW Reef w/L2 Algae Scrubber | 200 SW Reef w/L4 Algae Scrubber
Special knowledge: Algae Scrubbers, Acrylic Fabrication