My two cents:
Four 48V (nominal) panels in series will produce the voltage needed to charge a 144V battery bank. No idea about controllers on the market. For simplicity's sake, if you are the controller and monitor the voltages, you can disconnect the panels when your bank reaches full charge. I don't recommend this, unless you are extremely methodical!
Here's a toast to the ships and women of our land, may the former be well rigged and the latter be well manned. (sorry ladies, old sailors are a pretty rough crowd)
Attributed to Spike Africa, Sausalito
Wholly Happy Days!!!
Sailonner
--- In electricboats@yahoogroups.com, "Steve D" <sdolan@...> wrote:
>
> Solar power isn't something I know a whole lot about so I hope some can fill me in on a couple qustions and concerns. I'm planning on doing an install next year
> System:
> 144v Propulsion Pack at 210AH
> 12v House bank at 640AH fed from the Propulsion bank (144v to 12v)
> I want to add 2 maybe 3 210w solar panels on the davits. I of course would like to go to both the House and Propulsion banks once one or the other is fully charged and then anything still being generated at the solar panels is available to go to house "on" items. As far as I can tell I'd have to step up the output at the panels to 144v and go directly to the Propulsion bank then feed off it as usual however I haven't been able to find anything that would step the voltages up to 144v. Does this sound like the way to go? I don't think I can get panels up to that voltage but then I haven't checked either.
> I have buss bars already to except the Regen and Genset power. If the above is correct would the MPPT controller get wired at this point?
> Forget about it being 144v, but a general systems question. So you are sailing along running the toaster oven and notice it's got the batteries down to 50%. Your regenerating a few Amps and the solars are also generating a few and then you kick on the Honda (output is 48v). Your getting 3 points of power at 48v each going to the same buss bar and then to the batteries. What voltage is going to the batteries? My Mind says to multiply the voltages by 3 (series?) but that can't be right. Kind of brain dead on this rainy day.
> Is there anything different running solar to AGM's vs. LiFePO4's? I don't want to do this twice.
>
> Thanks in advance and Happy Holidays,
>
> Steve in Solomons MD
> Lagoon 410 SE
>
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