The big downside to the instant water heaters, besides the electrical draw, is the total temperature rise. That unit provides a 32 degree temp rise at .35 gpm, dropping to 24 degree rise at .5 gpm, so the more flow the cooler it gets. So you can get the water from 60 to 92 if you can live with a quart a minute flow. Try that at home and see if you like it...
Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC On 2 September 2015 at 11:50, Della Barba, Joe via CnC-List < [email protected]> wrote: > I usually wire inverters to not supply the battery charger and water > heater. > > You may want to change your AC wiring to do this. > Joe > > Coquina > > > > *From:* CnC-List [mailto:[email protected]] *On Behalf Of *Ron > Ricci via CnC-List > *Sent:* Wednesday, September 02, 2015 1:41 PM > *To:* 'C&C List' > *Cc:* Ron Ricci > *Subject:* Re: Stus-List Hot water tank > > > > My boat has a combination 120 VAC 1.5 kW electric/engine coolant hot water > heater. It holds 6 gallons of fresh water. For grins, I tried it on the > battery/inverter and it drew 117 amps DC. This is consistent with the > unit’s rating as the battery voltage dropped below 12 VDC when tried. > Since my alternator can only put out 55 amps and the battery cables are > only #4 AWG, running the heater with shore power does not seem practical. > I do not normally have AC shore power. To prevent inadvertently turning on > the heater, I disconnected the power feed at the circuit breaker. > > > > The engine coolant part of the heater works great. We can run the engine > in the afternoon to recharge batteries and/or go to a mooring. There is > plenty of hot water for dinner dishes and a couple of quick showers. > > > > > > Regards, > > *Ron* > > Ron Ricci > > S/V Patriot > > C&C 37+ > > Bristol, RI > > [email protected] > > > > > > > > > > _______________________________________________ > > Email address: > [email protected] > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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