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04-11-2016, 09:55
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#211
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Moderator Emeritus
Join Date: Feb 2014
Location: Seville London Eastbourne
Posts: 13,406
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by Sandero
You can produce your own project use... for each draw on the boat... lights, instruments, pumps and so on... and then size your charging accordingly and the batteries of course.
Do it yourself. If you are up to owning a running a boat... you need to have the intelligence and independence to be self sufficient... and don't expect others to tell YOU want to do with YOUR boat.
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Not Nice Sandero.
__________________
- Never test how deep the water is with both feet -
10% of conflicts are due to different opinions. 90% by the tone of voice.
Raise your words, not your voice. It is rain that grows flowers, not thunder.
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04-11-2016, 11:26
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#212
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Registered User
Join Date: Feb 2009
Posts: 1,315
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by weavis
Not Nice Sandero.
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If I may differ?
Quote:
Originally Posted by Sandero
You can produce your own project use... for each draw on the boat... lights, instruments, pumps and so on... and then size your charging accordingly and the batteries of course.
Do it yourself. If you are up to owning a running a boat... you need to have the intelligence and independence to be self sufficient... and don't expect others to tell YOU want to do with YOUR boat.
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To the point Sandero and good advice.
Quote:
Originally Posted by Pete O Static
So, after 40 plus years of sailing, I don't expect "others to tell me what to do with my boat" but I am interested in the results others have experienced with theirs.
It is beyond me why this thread seems to attract such condescending responses.
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Not nice Static. The fact that after 40 plus years you have to compare yours results with others means that you are still uncertain about your installation. And what “40 years” got to do about getting it right? Learning requires a change of behaviour and may entails others to tell you what to do with your boat.
Quote:
Originally Posted by SV THIRD DAY
There was a little shock in another thread about the amount of power used on a daily basis by a Cruising Boat. Of course it will vary depending on if you are at anchor for the Day or Underway with all the electronic nav equipment and autopilot running. Number of crew also matters. So does having a wind vane vs electric autopilot. Refrigeration or no refrigeration. So to help those in the planning stages what do those out cruising or living aboard full time find to be their average power usage for Living at Anchor and While Underway?
Our data:
Crew of 4
Refrigerator and Freezer, electric Autopilot.
Living at anchor: 200-250AH/day
While Underway 300-400AH/day
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The original post is about power (not about, quote: peoples real world experiences because solar depends on so many variables, such as panel placement, wiring, geographic location, installation etc.) and gets mixed up by most people quoting installed capacity.
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04-11-2016, 12:01
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#213
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Registered User
Join Date: Aug 2013
Location: Back in Montt.
Boat: Westerly Sealord
Posts: 8,180
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Re: What is your Real Amp Hour per Day Usage
I'm not using very much in the way of amps at all just now.... The fridge is toast and the fridge mechanic has buggered off to Bolivia, the heater is ashore at the last port... as is the wind gen.... meanwhile she is tide rode and the rain is coming in the back door... oh joy....
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04-11-2016, 15:39
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#214
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,155
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by El Pinguino
I'm not using very much in the way of amps at all just now.... The fridge is toast and the fridge mechanic has buggered off to Bolivia, the heater is ashore at the last port... as is the wind gen.... meanwhile she is tide rode and the rain is coming in the back door... oh joy....
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So, tell me Ping: are you having fun yet?
That sounds pretty crappy to me, mate... sorry to hear of all the problems.
I'll pass on your news to the Comedy Net tomorrow.
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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04-11-2016, 18:10
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#215
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Registered User
Join Date: Feb 2009
Posts: 1,315
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by chala
people quoting installed capacity.
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Should read: people quoting used capacity.
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05-11-2016, 04:24
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#216
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Registered User
Join Date: Jul 2015
Location: Orential N.C.
Boat: 1981 Morgan OI 41
Posts: 162
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by chala
Nothing is stopping you for contributing positively to this thread.
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Thing is I have no real world experience, just got my boat getting her ready to "Go" I have to build up a system from scratch. I'm going to start with 4-6v Gel golf cart batteries and maybe 4-600 watts of solar with an MMPT charger.
Thats all I got for now.
So my contributions to this particular topic aren't really worthwhile.
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05-11-2016, 05:45
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#217
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Registered User
Join Date: Aug 2013
Location: Back in Montt.
Boat: Westerly Sealord
Posts: 8,180
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by Jim Cate
So, tell me Ping: are you having fun yet?
That sounds pretty crappy to me, mate... sorry to hear of all the problems.
I'll pass on your news to the Comedy Net tomorrow.
Jim
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It only hurts when I larf.......
Not real problems ... not hot enough to need the fridge, not cold enough to need the heater.. may have to run the Honda today though as after 36 hours here with no input from anything the batts are down a bit.
A month of sunshine and then when I go sailing....
Light southerlies forecast from manana so sun and clear blue skies to blow us back to Montt over the next 10 days ...
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05-11-2016, 06:07
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#218
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Registered User
Join Date: Apr 2006
Posts: 4,413
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Re: What is your Real Amp Hour per Day Usage
I suppose someone will add a clock dsoftware and a logger functiob to measure daily amp consumption and then you can know...
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06-11-2016, 22:40
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#221
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Registered User
Join Date: Feb 2009
Posts: 1,315
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Re: What is your Real Amp Hour per Day Usage
The terms power and energy are frequently confused.
Power = the rate of doing work, the rate of consuming or transferring energy, is measured in watts.
The rate at which work is done equals the product of voltage and current. P = V * A.
Quote:
Originally Posted by SV THIRD DAY
There was a little shock in another thread about the amount of power used on a daily basis by a Cruising Boat.
So to help those in the planning stages what do those out cruising or living aboard full time find to be their average power usage for Living at Anchor and While Underway?
Living at anchor: 200-250AH/day
While Underway 300-400AH/day
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Was SV confused and meant to write energy instead of power? He definitely quoted energy usage.
Quote:
Originally Posted by Stevens 47
Winter in Mexico last used about 95 amps per 24 hour period.
Summer in the SOC used up 120 amps during the hottest period.
While underway the autopilot and nav system uses about between 9-12 amps per hour additional.
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Quote:
Originally Posted by barnakiel
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Both quoted power and did not need to be corrected.
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06-11-2016, 23:48
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#222
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Senior Cruiser
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,888
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by chala
Power = the rate of doing work...
Quote:
Originally Posted by Stevens 47
Winter in Mexico last used about 95 amps per 24 hour period.
Summer in the SOC used up 120 amps during the hottest period.
While underway the autopilot and nav system uses about between 9-12 amps per hour additional.
Quote:
Originally Posted by barnakiel
About 20 A / day anchored.
About 15 A / day sailing.
Both quoted power and did not need to be corrected.
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Sigh! Earwig Ho agen.
Neither quoted power.
You don't " use" power, you use energy. As you correctly state, Power is a RATE of doing work (a.k.a. amount of energy consumed per unit time).
You can't "use" Amps or Watts over a time period. So talking of usage in terms of Amps/day or Amps/hr demonstrates a failure to comprehend the difference between power and energy.
The problem is that when it is done incorrectly like this you have to try to interpret what Barnakiel meant by "15 A / day sailing"
Is he a very heavy energy user or a very light user?
Did he mean that he consumed 15 Amp hours per day? ( in which case he is in the very low energy consumption group). Or was his average consumption over the 24 hours 15 Amps? (in which case he consumed 360 Amp hours per day and is more towards heavy energy user end of the spectrum).
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06-11-2016, 23:55
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#223
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Senior Cruiser
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,888
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by chala
Was SV confused and meant to write energy instead of power? He definitely quoted energy usage.
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Either confused or just unaware of the correct terminology.
But if we are really interested, from his figures we can tell his power demand. (Although his energy usage, as per the Thread Title in this case is far more important)
Living at anchor: 200-250AH/day = an average power demand of 8.3-10.4 Amps
While Underway 300-400AH/day = an average power demand of 12.5 - 16.7 Amps.
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07-11-2016, 00:06
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#224
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Senior Cruiser
Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,888
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Re: What is your Real Amp Hour per Day Usage
Quote:
Originally Posted by chala
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But be aware that the people who wrote some of those references are also very confused about the difference between Amps and Amp hours and use them incorrectly in many places. (FWIW, I wouldn't put too much faith in advice from sources which can't even get the basic units right)
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07-11-2016, 00:12
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#225
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,155
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Re: What is your Real Amp Hour per Day Usage
[QUOTE](FWIW, I wouldn't put too much faith in advice from sources which can't even get the basic units right)/QUOTE]
Careful, Stu, for that was a premise that I posted way back in the beginning of this thread, and I was well flamed for such an attitude!! Mea culpa and all that, but I sure agree with you!
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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