Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-07-2015, 03:57   #16
Registered User
 
Snowpetrel's Avatar

Join Date: Jul 2012
Location: Hobart
Boat: Alloy Peterson 40
Posts: 3,071
Re: Solar hot water

Quote:
Originally Posted by Dod42 View Post
Here is the article
Thanks Andy for a great article. It looks like a perfect system for my needs, though I might need the antifreeze system here in Tassie? Do you know who is likely to distribute it in Aussie? Cheers

Sent from my HTC_0PCV2 using Cruisers Sailing Forum mobile app
__________________

__________________
My Ramblings
Snowpetrel is offline   Reply With Quote
Old 13-07-2015, 04:39   #17
Vendor
 
witzgall's Avatar

Join Date: Oct 2006
Location: Eastern Shore, MD
Boat: Camper Nicholson 44 Ketch
Posts: 1,775
Re: Solar hot water

Quote:
Originally Posted by rgesner View Post
In another forum, a sailor who installed the Heliatos system had this to say:
"After about 4 weeks of cruising in the Med I can say that this solar hot water system works very well, hot water at the tap is obviously a joy both for showering and washing up. The circulating pump is plugged in to my 12V boat power supply (I do have solar panels), the quite silent circulating pump does not use much electricity and is connected to a 12V timer which in summer I set for 12 hours operation. Obviously the placing of the panel/panels is crucial and on an arch (which I don't have) would be close to perfect but anything on a boat is a compromise in some way."
You can omit the timer by simply powering the pump from solar. No sun, no pumping. We had this on our 2kw solar hot water system on our last house. In partly cloudy weather, you could hear the pump ramping up and down as the sun dodged the clouds.

Chris
__________________

__________________
witzgall is offline   Reply With Quote
Old 13-07-2015, 05:06   #18
Bailing as fast as I can.
 
GILow's Avatar

Join Date: Sep 2008
Location: Adelaide, South Australia
Boat: Swanson 42
Posts: 3,585
Re: Solar hot water

A caution to those considering the pool heating system. The physics of those systems break down at very low temperatures as they start to shed heat as fast as they collect it. Pool temperatures are quite low, so the cheap black plastic tube systems are ok, but if you want to get reasonable temperatures you need something a bit more complex. A magazine in Australia called "Renew" has some excellent articles, and from time to time covers home built solar hot water.

I have built a solar-hydronic heating system for our house and found the most cost effective mechanism these days are evacuated tubes, but I concede they are too fragile to use on a boat.


Matt
__________________
Very funny Scotty, now beam down my clothes.
http://www.swansonsailor.id.au
GILow is offline   Reply With Quote
Old 15-07-2015, 04:04   #19
Registered User
 
Dod42's Avatar

Join Date: Nov 2012
Location: Brisbane Australia
Boat: Fountaine Lipari 41 Evolution
Posts: 353
Re: Solar hot water

Quote:
Originally Posted by Snowpetrel View Post
Thanks Andy for a great article. It looks like a perfect system for my needs, though I might need the antifreeze system here in Tassie? Do you know who is likely to distribute it in Aussie? Cheers

Sent from my HTC_0PCV2 using Cruisers Sailing Forum mobile app

I'm not sure if Tim Rix has set the business yet but I can pm you his details otherwise if you email Aki at Heliatos he can give you all the details. Good people to deal with. If you are ever up in Brisbane feel free to come and have a look.

Over all very pleased with how well it works. Even in the current (bloody cold) Brisbane weather it's still working well. You can notice it not as hot as summer but still pleasantly warm.

The only issue for many is the realestate required. We had space but for many the space may be better used for solar PV panels. Horses for courses


Sent from my iPhone using Cruisers Sailing Forum
__________________
_______________________________________

https://www.facebook.com/SvTwoflower
Dod42 is offline   Reply With Quote
Old 15-07-2015, 04:36   #20
Registered User
 
Snowpetrel's Avatar

Join Date: Jul 2012
Location: Hobart
Boat: Alloy Peterson 40
Posts: 3,071
Re: Solar hot water

Quote:
Originally Posted by Dod42 View Post
...Over all very pleased with how well it works. Even in the current (bloody cold) Brisbane weather it's still working well. You can notice it not as hot as summer but still pleasantly warm.
Thanks for the info DoD. Still a few years away from needing one. Hopefully the Aussie supply will be sorted by then. Of more concern is how well it will work in a Tassie winter. Saying that even barely warm water is much quicker to boil than our normal freezing water!



Sent from my HTC_0PCV2 using Cruisers Sailing Forum mobile app
__________________
My Ramblings
Snowpetrel is offline   Reply With Quote
Old 15-07-2015, 08:08   #21
Registered User
 
Privilege's Avatar

Join Date: Oct 2009
Location: Bermuda
Boat: Privilege 435
Posts: 362
Images: 12
Re: Solar hot water

I'm not sure if this counts as a thread hijack but if you have the room and a pre-existing propane supply, an instantaneous/tankless propane water heater is worth considering. They are a few hundred bucks to buy, easy to install and very reliable. They sense when there is water running through and fire up from a 'C' battery. I have two barbeque-size propane tanks on board and they will easily last six months for the two of us showering once or twice a day. The only downside is that you have to find a way to vent the exhaust overboard. I installed a clamshell vent on the deck.

__________________
Privilege is online now   Reply With Quote
Old 15-07-2015, 15:51   #22
Bailing as fast as I can.
 
GILow's Avatar

Join Date: Sep 2008
Location: Adelaide, South Australia
Boat: Swanson 42
Posts: 3,585
Re: Solar hot water

We had one of those on our boat when we bought her. Scared the crap out of me. Couldn't disconnect if fast enough. So many ways to fail and dump gas into the bilge.

Matt


Sent from my iPad using Cruisers Sailing Forum
__________________
Very funny Scotty, now beam down my clothes.
http://www.swansonsailor.id.au
GILow is offline   Reply With Quote
Old 15-07-2015, 21:27   #23
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,827
Re: Solar hot water

Given solar (more or less every day) which makes more sense?
Packing the power into a LiFePo4 bank, turning on a hot water electric element when you need hot water, or heating water every day even if you don't necessarily need it and trying to keep hot water in a tank with aerogel or other insulation?

Basically, all I'm saying is which has less loss, the LiFePo4 bank or your hot water tank insulation?

I've had both systems, one each on two boats.
I prefer solar electric and LiFePo4 with electric tank heating because we don't have to worry about freezing lines, periodically burping the high spot on the water loop, recirculating pump annual replacements etc. Just throw a switch for 20 minutes and we have hot water.

Summertime, when we use the boat the most, we always have enough solar (320 watts) to have all the juice we need AND hot water for all our needs including making water and showers.
__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is offline   Reply With Quote
Old 16-07-2015, 07:27   #24
Registered User

Join Date: Apr 2013
Posts: 4,880
Re: Solar hot water

Quote:
Originally Posted by Privilege View Post
I'm not sure if this counts as a thread hijack but if you have the room and a pre-existing propane supply, an instantaneous/tankless propane water heater is worth considering. They are a few hundred bucks to buy, easy to install and very reliable. They sense when there is water running through and fire up from a 'C' battery. I have two barbeque-size propane tanks on board and they will easily last six months for the two of us showering once or twice a day. The only downside is that you have to find a way to vent the exhaust overboard. I installed a clamshell vent on the deck.

We have one of these on the boat and almost never use it. Any fluctuation in water pressure (like when the pump cycles) and it cycles from burning hot to icy cold.

We went with the solar shower bag. I think something similar with an inlet and outlet hose would do the trick. No need to leave the circulation pump running all the time. Maybe every couple hours have it cycle the water thru.

I wouldn't count on 30 C water unless it's pretty hot out...in which case, really hot water isn't so critical.
__________________
valhalla360 is online now   Reply With Quote
Old 20-07-2015, 01:44   #25
Registered User
 
Dod42's Avatar

Join Date: Nov 2012
Location: Brisbane Australia
Boat: Fountaine Lipari 41 Evolution
Posts: 353
Re: Solar hot water

Australian distributor Tim Rix

http://www.solaexchange.com.au

Near Moolloolaba Qld


https://www.facebook.com/SvTwoflower
__________________

__________________
_______________________________________

https://www.facebook.com/SvTwoflower
Dod42 is offline   Reply With Quote
Reply

Tags
solar, water

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HOT HOT HOT! running AC on Honda generator sailorboy1 Plumbing Systems and Fixtures 12 09-07-2013 18:07
Solar Hot Water clarity36 Plumbing Systems and Fixtures 5 26-09-2012 21:36
Hot Water System - Extra Hot Water Needed ? Harben Plumbing Systems and Fixtures 8 07-10-2010 17:20
Hot water is TOO hot. By Invitation Construction, Maintenance & Refit 10 18-08-2007 07:02
Ohhhhh Hot! Hot! Hot! knottybuoyz Marine Electronics 6 01-06-2007 08:43



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.