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Solar panels

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BERT A24 says:

Has anyone fitted solar panels to their Achilles 24. Where is the best place to install them?
12:55PM, 10 May 2013 PDT (permalink)

busy home [deleted] says:

Yes , all mine have had them ..
Best place is on the lazerette. but not critical.
75 months ago (permalink)

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spearhead_027 says:

I have one on each lazarette lid on Spring Run, which works as well as one can expect for a deck fitment. Only problem to be aware of there concerns the bolt end projecting from the rudderhead, which can do damage when opening the lid, so coach the crew to beware this. If you're cruising, you need the biggest panels that will fit, as there's never enough charge at night (although LEDs help enormously).

The battery is installed in a box forward in the lazarette, which makes wiring it up easier. Since I'm usually singlehanded, moving a bit of weight aft like this helps the boat balance.
75 months ago (permalink)

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Amrum 9171Y says:

The one on Snifter was on the deck between the mast and the spray hood. Worked well there, and seemed to be a place where I never stood.
75 months ago (permalink)

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BERT A24 says:

I would like to fit two 20W panels which are about 550mm X 300mm so will need to measure the lids to see if there is any way of fitting them there. My two batteries are in the starboard locker so one cable gland and two ip67 plugs and sockets on the cables would allow me to disconnect either one when removing the lid.
75 months ago (permalink)

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Red Marlin says:

Solar panels are just great. OK we have a 9M and live on board a lot of the year so our need is different. We have 120 w and a siemens regulator. Mostly needed for the fridge and the freezer. Had a smaller one before and was forever switching on and off and watching battery level. Now I just forget it. Getting a bit bigger pays off.
75 months ago (permalink)

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rothwell_neil says:

I had them on the lazarette and also one on the garage in front of the sprayhood. Through work we did some work on remote data logging stations and was amazed at the effect of angle on power. If you are on a mooring or at anchor then flat is the only option but if you are in a marina then the angle makes a massive difference. In winter the panel should be at about 65-70 degrees from horizontal as in more vertical than horizontal and facing south. The effect is massive as in almost three times as much power from the panel. Flat gives 30% of the expected power. In summer this should still be 50-60 degrees as the sun is still low in the northern hemisphere. So in Paladin I have a bracket for the Marina that has it at 65 degrees due south, 10W panel kept two batteries at peak charge all the way into November. With a 12W flat on Emily the a single battery used to discharge after peak summer, not as fast as without the panel but wouldn't hold full charge through autumn into winter. Now 10W does two batteries.

For summer, take the latitude, multiply by 0.92, and subtract 24.3 degrees.
For spring and autumn, take the latitude, multiply by 0.98, and subtract 2.3 degrees.
For winter, take the latitude, multiply by 0.89, and add 24 degrees.
Originally posted 75 months ago. (permalink)
rothwell_neil edited this topic 75 months ago.

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BERT A24 says:

Thanks Neil for your info on the angle to power ratio. This has got me thinking, if I mounted a stanchion base just beside the lid close to the rail ( one on either side ), use a piece of 1" pipe about a foot long and weld a piece of flat on the end to form half of a hinge. I could then make a simple bracket for the solar panel to form the other half of the hinge and hold it together with a bolt and a T nut, which would make it easily adjustable. Drill and tap the stanchion base and use a T bolt to secure the pipe and adjust the direction.
I have also been looking at a MPPT controller which will boost the efficiency of the solar panels.
75 months ago (permalink)

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Skykomish1 says:

We had a rigid panel which we fitted on a bracket on the pushpit on the Achilles this way it could be adjusted for optimum angle to sun plus was clear of shadows for the most part
www.flickr.com/photos/8644331@N08/3518386155/in/photostream
Originally posted 75 months ago. (permalink)
Skykomish1 edited this topic 75 months ago.

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NormanKlipspringer is a group administrator NormanKlipspringer says:

I have a flexible solar panel on the garage roof.
www.flickr.com/photos/achilles24/4882251794/in/set-721576...
It was on the boat when I bought it and I do not as a result have any details. It does seem to be capable of keeping my batteries topped up but not of charging if low. The big advantage of its location is that it is not in the way. Its construction is such that it can be walked on. I understand that this type of panel is not as efficient as the rigid versions and of course its angle to the sun cannot be altered.
Originally posted 75 months ago. (permalink)
NormanKlipspringer (a group admin) edited this topic 75 months ago.

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