Some of the older Trace inverters (before the Xantrex land grab) , mostly those intended for Solar systems, had the ability to 'assist' incoming AC power. It was a great system. If we need 40A of power for a short time, the inverter can assist the 30A dock power feed providing 10 additional amps. Once the short term need passes, the inverter will switch back to recharging the batteries. It is an Assist Mode as opposed to All or None mode.
Great system, and I think there is another brand from Europe that does the same thing. However, not 'allowed' on our Boats per ABYC. .. Too bad, it would go to solve many many issues if live aboards. -al- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, April 18, 2011 9:21 AM To: [email protected] Subject: Re: [Liveaboard] EXT :Re: Power Issue Ahmet, I see the confusion. How can the inverter produce 120vac output from the batteries yet also charge the batteries at the same time since both actions use the inverter's transformers. I will make a note to investigate this the next time I go to the boat and get back to you. The primary concept is that connecting 120vac dock power (or genset power) to the output of an inverter will destroy all the FETs in the inverter. As my manual says: "This damage is massive, obvious, and not covered by the warranty." Norm S/V Bandersnatch ----- Original Message ----- From: ahmet erkan <mailto:[email protected]> To: [email protected] Sent: 4/17/2011 3:14:11 PM Subject: Re: [Liveaboard] EXT :Re: Power Issue Hi Norm, The first paragraph does not make sense to me. How can you add power to the AC input and charge the batteries from it at the same time? Ahmet > > > > My Trace 12VDC 2.5KW inverter has an input for 120vac and an output for > 120vac. When 120vac appears on the input the inverter instantly connects > the input to the output and disconnects itself. Then it synchronizes > itself to the input (takes about five seconds), then parallels itself to > the input so it adds its power to that of the input's (and also starts > charging the batteries). So everything is automatic and no magic smoke > gets out. >
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