Power draw question

[dave nederhood]

Good afternoon, all:

I am working on figuring out my daily electrical draw prior to buying new house batteries. I do not have refrigeration, so my "big" draws are; autopilot, chartplotter, running lites (all LED), interior lites (LED), VHF, wind instruments, depth, speed, and AIS. Most on the list are "big" only because they are on 24/7.  Does anyone know the typical power draw (amps/hr)for a below deck autopilot (Cetrek propilot 700)? My Cetrek is old as dirt, company out of business, but I have all the manuals. All I can find is that the system requires a 25amp antisurge fuse (from battery to power interface) and a 3amp fuse between power interface & steering motor. thanks Dave