Re: [electricboats] When the ideal house voltage please stand up?

I think it wise to always have a separate 12V system for your instruments, running lights, and communications along with at least one stone age lead acid (or AGM) battery to power it with. And know that you can charge a 12V lead acid battery directly from a 100 watt solar panel in an emergency situation. You have to babysit the battery and disconnect the panel when the battery gets hot (or before).

This is a safety issue for when your 48V to 120 A/C inverter quits working (notice I didn't say IF I said WHEN, just remember. it is boat) but you will carry a spare inverter right? And you can change it out in 5-8 foot seas, in the dark, while raining, with no problems right? Because that's when things quit or get broken, the absolute worst time you can think of. But not to worry, your ole magnetic compass is right there by the wheel so you can see it, well if the wind hasn't blown your hat off so you can keep the rain out of you eyes.

Now with that being said, once you have this separate, almost bulletproof, navigation/communication system sorted, there is nothing wrong with using your traction batteries to power the rest of your "house". And /or using the traction batteries to charge the nav/comm battery with a DC to DC step-down.

So Aton listed 3 systems;

Propulsion

generator charging

and solar charging.

I would add;

 the nav/comm system

and the shore power charging system.

Each separate system alone should be simple enough but adding them all together is more complicated.

But once connected, having them all separate means that they will be easier to troubleshoot when one system stops working in the conditions listed above.

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