Lights, if not LED, and not a tri-color mast head, will probably use up 4 amps per hour x 12 hours = 48 amp/hours
VHF, 0.5 Amps receiving x 24 hours = 12 Amp/hours
That means you are down to less then 30 amp/hours needed per day. which means 1 x 100watt solar panel and 1 battery would take care of you. So a pretty small system, to get you back. you probably could go with one of those semi-flexible panels, so you don't have to mount it.
You can also turn off your VHF most of the time, and save some power. But you should evaluate all the possible use more carefully: http://www.sailboat-cruising.com/boat-electrics.html
You just have to figure out how much you will use each day. Then get enough solar to replace those amps, and I would size the batteries for 2 days of use, so if the sun doesn't shine one day, you are okay.
Good luck, I guess you will get a tow up the river?
I have been up the St. Johns and stayed at green cove. There is a very strong current on the st. johns. It would be tricky sailing all the way up it. Also, a good amount of traffic.
On Fri, Feb 3, 2017 at 5:23 PM, Bob Moriarty moriartybob@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
Hi Jeff,So basically, you'd like to get up the St Johns River (to Green Cove Springs or beyond) under sail and reuse whatever auxiliary power sources you put in place in the USVI for an eventual conversion to electric auxiliary propulsion.I would get an inexpensive Harbor Freight generator for your motorless trip to the US mainland, if they're available in the USVI. It could serve eventually as a backup to your solar panels. Honda generators are much more expensive but might be an alternative.Ox 1976 C&C 33
LOA: 32.87' / 10.02m
LWL: 26.42' / 8.05m
Displacement: 9800 lbs./ 4445 kgs.
Propulsion System: Electroprop Racer
Batteries: 4 X Northstar 210 FT Blue+Current Prop: 2-blade fixed 16X10X1
(original - came w/A4)
Jax, FL USA
On Friday, February 3, 2017 9:38 PM, "Jeff LaCoursiere jeff@jeff.net [electricboats]" <electricboats@yahoogroups.com> wrote:
I am starting to plan the delivery of my poor old Hunter 38, currently
stranded in the USVI with no engine, back to Florida for its complete
renovation. I bought a 20KW motor kit from Electric Yacht (thanks
Mike!) which has been sitting in my garage for over a year now. I want
to do the refit at a particular yard outside Jacksonville, which happens
to be 50 miles up river from the entrance (low cost, easy access from my
sister's house).
I'm planning to purchase the bare minimum in supplies to make the trip,
and intend to do it motorless (the new motor, controller, etc will be
installed once it is there). Partly this is to avoid the cost and
hassle of shipping it all to the USVI, and partly because... I have this
odd desire to make the trip as low tech as possible - do it "the old way".
That said, I don't want to be completely foolish about it. I'd like to
take some power with me, and have at least lights and VHF. Any thoughts
on solar panels / chargers that wouldn't be wasted for the eventual
refit? In other words, what is the minimum I could buy to maintain
minimum power on board for perhaps 20 days with no generator, but that
could then be used as part of the refit for the eventual full electric
yacht? Hope that makes sense :)
j
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Posted by: Kev <captainyoung@gmail.com>
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