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Updated Solar Array
- Midnightsun
- CYO Supporter
- Posts: 2838
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
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Updated Solar Array
The biggest drawback of flexible panels is they have no airspace underneath and therefor tend to get too hot. People glue them down which is not at all a good choice. After scratching my head for a solution, I simply stuck 5 strips of closed cell foam underneath each panel which allows water to flow under and provides some much needed airspace/ventilation.
- Helmsman
- Commander
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- Joined: May 9th, 2016, 9:16 am
- Vessel Info: Temporarily Boatless
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Re: Updated Solar Array
- bud37
- Admiral
- Posts: 4677
- Joined: April 23rd, 2015, 10:22 pm
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Re: Updated Solar Array
- Phrancus
- CYO Supporter
- Posts: 388
- Joined: October 1st, 2020, 10:03 am
- Vessel Info: Sold: Carver 26 Command Bridge / 280 sedan 1992.
- Location: Netherlands, Europe
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Re: Updated Solar Array
Not sure I understand the solution to overheating. I see the metal mounting plates, did you put flexible strips under the panels to keep them at some distance from the roof?
- Midnightsun
- CYO Supporter
- Posts: 2838
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 254 times
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Re: Updated Solar Array
Phrancus wrote:Source of the post Nice job!
Not sure I understand the solution to overheating. I see the metal mounting plates, did you put flexible strips under the panels to keep them at some distance from the roof?
Correct. Five strips under each panel which run from fore to aft. As can be seen on the last picture, there is a good slope to the hardtop and this will allow the water to run under the panel as intended by the design of the hard top. The foam strips I used give about 3/8" clearance under the panels. The panels are secured to the standoffs (mounting plates) with nyloc nuts so I only tightened them down so the 3/8" gap remains on all the corners also.
I did some small test however being the banks are rather full and we did not travel far I did not see more then 90v at around 17a @ 14V. I am sure I can easily get twice the amps out of the panels once the battery/s get lower and will accept more charge. Good news is everything works as intended.
My lifepo4 bank is not installed yet by the way, hopefully this week though.
- pepmyster
- Admiral
- Posts: 966
- Joined: June 5th, 2018, 7:17 am
- Vessel Info: 2004 Carver 360 Sport Sedan
8.1 Volvo Penta
Fresh water boating - Location: Ottawa
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Re: Updated Solar Array
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- CYO Supporter
- Posts: 5803
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 431 times
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Re: Updated Solar Array
- Midnightsun
- CYO Supporter
- Posts: 2838
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 254 times
- Been thanked: 1095 times
Re: Updated Solar Array
Panel choice is really dependant on what you have for available real estate. I chose mine based on what size was available to best suit my hard top. There are so many choices out there however I suggest you stick with a well known brand such as Renogy or Sunpower. I am sure there are several brands out there as good however these are the brands most common out there.
MPPT controller, highly suggest you go with Victron Energy however once more, tons to choose from. Go bigger in case you want to add a panel or 2 down the road. Great products and if you stick with this brand everyone talks to each other. No need to install monitors as they are bluetooth and work anywhere on the boat. Personally I went with the 100/50. https://www.victronenergy.com/solar-cha ... -30-100-50
You may want to look into some tools and fittings for solar wire connections. This kit is spendy but does it all.
https://www.amazon.ca/gp/product/B07BFT3B4V/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
MC4 connectors. https://www.amazon.ca/Connector-Connectors-Female-Double-Waterproof/dp/B09NYDDYFX/ref=dp_prsubs_1?pd_rd_i=B09NYDDYFX&psc=1
I brought the main solar wires down from the panels to my 12v electrical panel where they are connected to a 50a breaker and obviously charge the house battery through the panel connection. Easy to shut down the system by just flipping the breaker.
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- CYO Supporter
- Posts: 5803
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Updated Solar Array
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