I got an automatic switch from West Marine that switches back and forth depending on the presence of shore power. You ever see an inverter power a battery charger? The charger is not 100% efficient and neither is the inverter, so making an endless loop with the inverter powering itself with the charger will always run the batteries dead.
Joe Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dennis C. via CnC-List Sent: Wednesday, September 02, 2015 4:07 PM To: CnClist Cc: Dennis C. Subject: Re: Stus-List Hot water tank Ditto. The 120 volt receptacles on Touche' are on a rotary switch for either shore power or inverter. The inverter cannot be connected to anything else. Specifically, the feed to the receptacle breaker is switched so the breaker remains in the circuit regardless of whether they are supplied by shore power or the inverter. The remainder of the AC panel is fed exclusively by shore power. Dennis C. On Wed, Sep 2, 2015 at 1:50 PM, Della Barba, Joe via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> 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:cnc-list-boun...@cnc-list.com<mailto:cnc-list-boun...@cnc-list.com>] 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 ron.ri...@1968.usna.com<mailto:ron.ri...@1968.usna.com> _______________________________________________ Email address: CnC-List@cnc-list.com<mailto:CnC-List@cnc-list.com> 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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