For people running xxV-12V converters, it's not a bad idea to get a small 12V battery (30Ah or less) that can operate as a buffer between your house loads and the converter. This will also keep the instruments, house lights, and nav lights on if the converter goes offline. It keeps basic 12V functionality in the boat even when the traction bank (48V in my case) is offline. A day-sailor may not need this type of redundancy.
One thing to keep in mind is that the converter will not charge the 12V, most converters put out 13.2-13.5V which won't really charge regular battery, though it does act as a "float" charge, keeping the little battery from self-discharging. In my setup, I throw a portable car charger on my 12V every couple of months to make sure that it's topped off. So far, it's never taken much of a charge.
Fair winds,
Eric
1964 Bermuda 30, 5.5kW Propulsion Marine drive, 8kWh TS LiFePO4 batteries
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "stmbtwle" <stmbtwle@...> wrote:
>
> Steve that sounds like a really well-thought-out installation. I agree that a 12v battery shouldn't be necessary except possibly for emergency gear. Some of the 24v-12v mppt solar charger controllers can be used as voltage converters (that's what they do anyway), and may be less expensive.
>
> Bill
>
> --- In electricboats@yahoogroups.com, "Steve" <sstuller@> wrote:
> >
> >
> >
> > I have a 24 volt (35 Vmp) panel on my boat to recharge a 24 volt battery bank for a Torqeedo 801L. I use a Samlex 24 volt to 12 volt converter which eliminates the need for a 12 volt battery. Thanks. Steve S.
> >
No comments:
Post a Comment