Ok as some of you may know ive been windowcleaning since August time and my round has built up slowly. I havent got the biggest system in the world just a 350ltr tank and a 20 odd foot pole. A hotel has asked for a quote which I obviously agreed to but im a little bit panicky that I wont be able to do the job for a few reasons. Number 1. Its quite a big hotel and im doubt my tank would be big enough. Number 2. Its a little bit of a drive from me and usually every***ht I put the battery on charge so its ready for the morning, if my battery runs out which is possible as its such a big hotel then im going to look like a fool. Any advice to these problems?