I would speculate that you may have your digits one place off in the EIS. I think it's going to be drawing about 1.5-2.0 amps. I have a 7.5A fuse in mine and I think it's probably overkill..
Thes are from the install manual..
The display units include internal thermally-activated fuses. This protects the equipment from
internal electrical faults. Power supplied to the EFIS must pass through an external fuse or circuit
breaker. It should be sized to allow at least 2 amps per display unit, with a maximum rating of 5
amps.
"The display units consume approximately 1 amp,
making even a small 3 Amp-Hour gel cell a suitable emergency source."
Katie or Ben will chime in here, but I know it wont be drawing 13 amps.