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Go Back   SailNet Community > Out There > Cruising & Liveaboard Forum > Living Aboard > Hot water
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Thread: Hot water Reply to Thread
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Topic Review (Newest First)
03-05-2012 08:55 AM
sea_hunter
Re: Hot water

Quote:
Originally Posted by MSter View Post
This may be a small tangent, but, another point to consider is the use of a diversion load from a solar/wind charge controller. This diversion load circuit can include a 12v heating element installed in the hot water tank in place of the 110v element. Once the charge controller satisfies the battery banks, it diverts usable voltage to the diversion load. This is something I am considering but have not yet tried or even fully investigated.
I've installed this diversionary system and it does work, but is dependent on the ability of the charge controller. The Outback has a very reasonable interface that's user friendly and easy to hook up. The element issue is neither here nor there as an element is merely a resistor and doesn't care about voltage (it's about cycling and amps). A small 2 gallon electric (110 or 220V) hot water tank (from your local home hardware store) with the diverted load wired through the thermostat works just fine. The only problem is when you're creating a large amount of diverted heat; you'll need a cold water mixing valve to prevent scalding.
03-05-2012 08:42 AM
sea_hunter
Re: Hot water

Quote:
Originally Posted by Amazing Grace View Post
Hot water on demand via LPG hot water heater. Runs directly off propane. Much more efficient than heat exchanger. Works on same principal as at home on demand LPG hot water heater. :-)
Tankless propane water heaters are not recommended for boats unless externally mounted. (Read manufacturers' instruction manuals) The other issue is tankless water heaters burn exorbitant amounts of NG or propane (Figure out the BTU's~ input to output) and are little better than generator powered electric versions. It's all in the math (or the fuel). In the end, diesel hot water heaters are the safest and most efficient.
03-05-2012 05:01 AM
Amazing Grace
Re: Hot water

Hot water on demand via LPG hot water heater. Runs directly off propane. Much more efficient than heat exchanger. Works on same principal as at home on demand LPG hot water heater. :-)
03-05-2012 03:41 AM
wouldrathersail
Re: Hot water

Interested to hear any input on this, as this is what we're planning to do...

Quote:
Originally Posted by MSter View Post
This may be a small tangent, but, another point to consider is the use of a diversion load from a solar/wind charge controller. This diversion load circuit can include a 12v heating element installed in the hot water tank in place of the 110v element. Once the charge controller satisfies the battery banks, it diverts usable voltage to the diversion load. This is something I am considering but have not yet tried or even fully investigated. How efficient is this (no idea)???....but it does seem logical not to waste the electrical potential when available.
02-19-2012 03:51 PM
Maine Sail
Quote:
Originally Posted by SVAuspicious View Post
I have owned and run both Webasto and Espar on my liveaboard boat. My experience has been that Espar is much more reliable and maintenance is easier.

Having worked on both, that is also my take... I have a number of customers who've owned both brands on different boats. Most have preferred the Espar to the Webasto.. . But again, both brands make a decent product and both are quite reliable...
02-19-2012 11:54 AM
SVAuspicious I have owned and run both Webasto and Espar on my liveaboard boat. My experience has been that Espar is much more reliable and maintenance is easier.
02-18-2012 08:23 PM
Maine Sail
Quote:
Originally Posted by sea_hunter View Post
That's a good suggestion, but would kibosh the ESPAR idea and go with the Webasto version as Espar is known for poor reliability and support.
Espar poor reliability?? Not my experience at all.... Up here Espar parts are VERY easy to get though you rarely need them and support is easily available if needed. Both Webasto and Espar are decent units.

If you'd said Espar is more expensive then I could agree but not on the reliability statement...
02-18-2012 06:39 PM
fallard On those rare occasions when we have a large crew out for a weekend, we supplement our domestic hot water supply with a sun shower. You can get 2-3 adult showers from a 4-5 gal bag, which is a lot better than we get with our pressure system.
02-18-2012 04:33 PM
JanetGroene Here's an alternative. Buy a new garden pressure sprayer (not an old one that has held poisons), heat the water on the stove or whatever means you have, and you have a shower wand. If you don't have a shower stall in the head, it can be used on deck or whatever. We also installed a sink sprayer in the cockpit, hooked into the pressure water system. After a swim, all we need is a fresh water rinse.
02-12-2012 11:12 PM
MSter This may be a small tangent, but, another point to consider is the use of a diversion load from a solar/wind charge controller. This diversion load circuit can include a 12v heating element installed in the hot water tank in place of the 110v element. Once the charge controller satisfies the battery banks, it diverts usable voltage to the diversion load. This is something I am considering but have not yet tried or even fully investigated. How efficient is this (no idea)???....but it does seem logical not to waste the electrical potential when available.
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