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Solar Panels (Type & Positioning) |
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Newbie Steve 
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Joined: 19 March 2021 Location: Rhode Island Status: Offline Points: 36 |
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 Topic: Solar Panels (Type & Positioning)Posted: 20 March 2021 at 15:46 |
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Hello,
I will be interested in having solar panels installed in a new 348. The objective would mainly be to simply run the refrigerator all of the time and maybe be able to recharge gadgets and use nav tools without always having to run the engine. Was wondering what types of panels (rigid or soft) and positioning (dodger, bimini, or near the companionway. I would hope to be able to have flexibility as to using the bimini and the dodger, but if that is impractical, would defer to having the panels on one of the two if having panels affixed to the deck is even less preferable. Any opinions or previous experience with this? Thanks!!
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Black Diamond
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Joined: 24 October 2015 Location: Newport, RI, US Status: Offline Points: 1275 |
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Posted: 20 March 2021 at 17:54 |
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On my 575 I have almost 800 watts across 5 Solbian flexible solar panels. On a
good day in June with the sun high I can get more almost 60 amps going
into the batteries. On a cloudy day, more than 35-40 (usually). We draw a lot of power, and I wanted the independence. You
need to look at your energy consumption as well as the size/type of
your battery bank. Some 600AH banks won't let you get more than 70%
SOC before you cannot run the compressor for refrigeration or use the
inverter for AC. Others let you go well below 50%. Our bank consists of 6 Firefly Carbon Foam AGMs that can draw down well below 50% SOC. As well, during
the day, with solar you won't be running your batteries down. They
should stay topped off. This means its really the period when solar
stops really keeping up until the next morning (12-14 hours) that your
batteries need to hold. Obviously its different if you have 5 days of
clouds and rain. Depending upon where you
put them, you will need to consider shadow and how the
panels/controller combination will behave. I went with 4 controllers
for the five panels given my two forward panels had a chance of boom
shadow. The mid and aft are on separate MPPT controllers. We
put ours on the bimini and used flexible panels. Others will swear
by rigid panels. Since our boat gets put up for winter, we decided
that bimini pockets and taking them in for the winter was best. Your
bimini is not likely as big, but my guess is you have plenty of options
to put panels up. A friend with a 455 also used panels stuck to the
line tunnels. These were rugged and you could walk on them. He got
about 300 watts that way. See pictures. A 455 with walkable solar panels...  Our 575 with the panels on the bimini  Hope this helps! Edited by Black Diamond - 02 December 2021 at 01:07 |
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Rick
S/V Black Diamond Hanse 575 Build #192, Hull# 161 Newport, RI |
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Pzucchel
Rear Admiral 
Joined: 13 March 2020 Location: floating Status: Offline Points: 659 |
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Posted: 20 March 2021 at 19:14 |
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Hi to all,
I follow black diamond on a similar strategy. I have a 588 and just finished installing 1080W solbian flexible panels on the t-top. For your information, customizing panels with solbian has a minor extra cost, and they are very collaborative in the custom design process. Apart from being very rugged, you could easily walk over, there are no cables on the front face. Also, they have a special design for shadows: there is a bypass diode for each line, so a line that doesn't draw the same current is simply bypassed. So, I have two mastervolt mppt and two mli ultra lithium batteries for 11kWh total usable charge. Interesting, the cables are at 100v, so they are very thin and are easy to reroute... Will give you more data when I will have finished the commissioning, and I will share the technical information... In the picture below, 2x little triangular panels are missing..
 Edited by Pzucchel - 21 March 2021 at 19:35 |
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Hanse588#55
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Newbie Steve
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Joined: 19 March 2021 Location: Rhode Island Status: Offline Points: 36 |
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Posted: 21 March 2021 at 12:13 |
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This is so helpful. Thanks to both of you so much for sharing your experience and taking the time to reply so fully!!
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Pzucchel
Rear Admiral
Joined: 13 March 2020 Location: floating Status: Offline Points: 659 |
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Posted: 21 March 2021 at 19:34 |
When I've validated the installation, I am happy both to share the design and the contacts. Both solbian and mastervolt have been very helpful... The installation was so great I am reflecting if it's worth adding another kW on the deck... I want to do some real world testing before...
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Hanse588#55
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Newbie Steve
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Joined: 19 March 2021 Location: Rhode Island Status: Offline Points: 36 |
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Posted: 22 March 2021 at 12:19 |
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Sure, that would be fantastic. Meanwhile, I will continue my research!
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Elleve
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Joined: 11 August 2021 Location: USA Status: Offline Points: 23 |
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Posted: 11 August 2021 at 22:17 |
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Last year I installed a 170W of solar panel on the foredeck of my H345, together with a MPPT charge controller. The placement is great and out of the way, and these easily allow me to keep the refrigerator running while at anchor (6A draw with a varying duty cycle depending on outside temperature). Realistically, this setup generates about 120W of usable power on good days.
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H345 Elleve #312
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PekkaL
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Joined: 01 January 2005 Location: Finland Status: Offline Points: 110 |
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Posted: 12 August 2021 at 07:16 |
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Just remember that when one solar panels' cell is even partially in shadow, that reduces the output of the entire panel.
Thus two or more small panels will in reality provide more charge than one large, even when their theoretical output is less.
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Pekka Leppanen, "Vedette"
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Newbie Steve
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Joined: 19 March 2021 Location: Rhode Island Status: Offline Points: 36 |
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Posted: 22 August 2021 at 23:05 |
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Thank you both for your information. My dealer is saying he can have removable-if-necessary panel(s) placed on a custom bimini as another choice. I would think passengers would want to sit on the foredeck at times when we may not be under sail. What do you think?
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CrocDundee
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Joined: 12 December 2018 Location: Dundee Status: Offline Points: 88 |
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Posted: 24 August 2021 at 11:49 |
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Many of these deck mounted solar panels can be walked on or sunbathed on. Most of the time they will be generating, but OK to cover up when the space is needed for other activities.
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Hanse 345 - Tenacious. Sailing on the Solent and now to the west coast of Scotland.
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Newbie Steve wrote: