Alan de Enfield

You cannot say that - next you'll be suggesting that during the interview he was shown a line of shovels leaning against the wall, and, on being told to take his pick ................... He failed.

If it is over 7' 1" (2.16m) then the licence fee will be subject to a 19% surcharge as it is a 'widebeam' Which is a little odd, as the legal definition of a NB is under 7' 6". But C&RT is C&RT !

It's a man who repairs roads - they don't seem to be very prolific these days.

No one is arguing that a NB can be self sufficient in harvesting power in the Summer months - the problem is with you quoting solar yield over 1567 day and saying it averages 3.6 kwh per day. That average could be achieved by 7.2kwh per day in the summer 6 months, and 0 kwh in the winter months. Try providing the information on a weekly basis. The actual argument is that for several months of the year the roof of a NB is not large enough to host solar panels capable of providing sufficient power.

I was thinking of Fuel boats and marinas with 'surface tanks' - they are still using standard dispensing pumps.

Our local petrol station sells both Gas Oil (Red Diesel) and Kerosene. The pumps have a notice on them "not for highway use".

But the claim is that a NB has sufficient roof space for sufficient solar panels to propel a NB for 12 months of the year for 2-4 hours per day. No need for charging points or a generator.

@IanD has published his 'harvesting' numbers and his 'consumption' numbers, and I think he found that the theory suggesting the number of Wh he could harvest was generally unachievable by quite a margin. These are real life, UK canal achieved numbers. Maybe he would be kind enough to repost ?

Diesel / Petrol dispensing pumps are calibrated at 15 degrees C, so the amount actually dispensed can vary quite consideraly between (sa) 10 degrees and 30 degrees. You might not actually get the amount your paying for !

Currently - yes. But we have 40 years of canal boating and we pretty much always got a marina discount. Presumably, as you say, there is more risk of break in etc when 'left' on the bankside as compared to being 'locked up' in a marina.

That subject was actually on the news yesterday, warning motorists to to fill their car tank above 3/4

Already under discussion, with many posts about it, in this thread

I can only tell you my experiences - this year a £45 reduction for being in a marina. And no loss of excess "Marina Benefit"

I cannot think of any 20hp OBs with PTT. Edit : How things change - a quick search shows Tohatsu and Honda have 20hp models with PTT

Maybe the marina I'm in is unusual, but, staff walk past every boat a couple of times a day and the night-watchman walks the marina every 2-3 hours during the night.