Originally Posted by sailinglegend
We take 10-15 amps when sailing - that is on a bad weather
day without solar, or the solar is totally shaded by the sails
, and without using our DuoGen towing generator. That's 240-360 Ahs/day. Deduct 60 AH for the fridge only working half the time and another 60 Ah for the Autopilot not working flat out all the time and any cruiser can easily get to 225 Ahs/day.
We have the Radar
on standby most of the time and all the usual power saving devices like LEDs. We often switch the Autopilot response down from 5 to 3 to save power, but we have set up our system for the worse case scenario of 250 Ah/day. With our 1050 Ah bank we can sail continually for 48 hours without charging
In practice - in the real world - when the sun is shining and the DuoGen towing generator working we arrive at our destination
with more Ahs in our batteries then when we started.
In some of your recent post Maine
Sail you have been talking a lot about batteries etc. and how they perform - in the real world
. We all really appreciate those articles buy have you just exposed your weakness about how serious cruisers cruise. Perhaps you need to get out of the marina for more than just a weekend and see just how many Ahs some cruisers can use.
It is often too easy for too many people on this generally excellent forum to make too many comments that are generally too general!
I have plenty of "real" cruising boats I work on and am far from just a guy who works on "marina queens" many of my summer time customers are off cruising right now with well managed systems.. I fully uderstand cruisers needs are all different.
That comment was based on a response to him needing more than a 100A alternator
and in a "joking" fashion hence the winkie. We do joke here on occasion...
I made my post tongue in cheek based on the evidence on hand at the time and, in hindsight, probably should not have. I would be quite curious for Cutterman to tell us his actual net measured daily averages though.
It was also loosely based in response to the fact that Cutterman stated he already had solar (355W), was going to add a wind
and a water
generator. There is absolutely nothing wrong with sizing for a worst case, and I would in-fact advise that if it suits the wallet and your comfort level.
Originally Posted by Cutterman
I have 3 x 75W and 2 x 65W solar panels
and plan to buy an Airbreeze and a used wind/water generator
which should be sufficient to drive the fridge/freezer a lot of the time.
And of course you stated you've sized for 250Ah day but then say;
Originally Posted by sailinglegend
In practice - in the real world - when the sun is shining and the DuoGen towing generator working we arrive at our destination with more Ahs in our batteries then when we started.
My statement, as I said, was loosely based on "real world" experiences, as your statement above was. You just finsihed telling us how you're sized for 250Ah's a day then tell us how in the "real world" you arrive with more Ah's then you set out with. That is also where my post came from based on Cutterman's own statements about solar, wind
and adding a water
What I see my cruising customers use who have both solar and wind on a daily Ah basis varies widely. I have some who use well under 40Ah's a day net while at sea and others who use considerably more even with solar and wind. Can max worst case system design happen, of course. With both solar and wind it's not going to be an every day occurrence. Sometimes designing a system around an occasional occurrence can get steep price
wise, eat into space, especially on a 33 footer, and the cost factor of drawing the bank to 80% DOD, on occasion, has to be examined against the cost of additional equipment
, customizing etc. etc. etc... Some people choose to always size for worst case and if the wallet is happy that is all that matters..
Beyond that our own boat "cruised" for 5 years 24/7 with 95% of the time spent on the hook. I guess this is not "serious" enough cruising for you???
She did so with a single
80W panel and stock 50A alternator
. She was cruised with energy conservation and used engine
. Every cruiser has their own consumptions but both are "serious cruisers".
Cutterman, I apologize for my response if it was taken as anything but in good humor
and loosely based on what you told us you had and were adding for energy production.. If you get a chance I'd love to know your average daily "net" Ah use with your new system in place....
sailinglegend, I find your attempt at a personal level dig / insult to me both uncalled for and immature... I would expect better. I have been polite to you....