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Thread: Solar chargers
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03-27-2013, 07:24 PM #1Member
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Solar chargers
I store my boat in storage lot near my lake without access to electrical. To help the keep the batteries charged, I'm contemplating a solar charger. I'm considering the following two:
http://www.amazon.com/Sunforce-50022.../dp/B0006JO0TC
http://www.amazon.com/Sunforce-50033.../dp/B001RJOP5Y
Does anyone have any experience with either? Or any thoughts about using solar chargers like this in general.
Thanks, Tom2008 Mobius LSV, 325 Assault, Acme 1433
Ballast: 1100s rear, 400 center and IBS plumbed on valve. 3 Johnson Reversibles.
Audio: 2 SKM10 subs and 6 KM6200s powered by Kicker IX1000.5, Pair REV8s powered by JL M4300 amp, Kenwood 440u head unit, RC107 remote at helm, and RC60 remote at transom
Misc: Blue Seas Add-a-Battery, SeaDek, Evolution Cover, Blue interior LEDs, 2 Attwood Underwater LEDs
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03-27-2013, 08:24 PM #2
Tom,
Something like that will maintain a fully charged battery, providing there is enough sun, but it will not do well to recharge a depleted house battery if the boat is put back in storage after a long weekend with a lot of time spent playing the system while at anchor.
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03-27-2013, 08:30 PM #3Member
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- Jun 2010
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- Raleigh, NC
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MLA,
Thanks. I usually don't spend much time anchored discharging the batteries. I'm mostly concerned about the bilge pump discharging the battery, which has happened to me (though I might not even have this problem anymore with my new cover). I suppose every bit of extra charge helps.
Tom
2008 Mobius LSV, 325 Assault, Acme 1433
Ballast: 1100s rear, 400 center and IBS plumbed on valve. 3 Johnson Reversibles.
Audio: 2 SKM10 subs and 6 KM6200s powered by Kicker IX1000.5, Pair REV8s powered by JL M4300 amp, Kenwood 440u head unit, RC107 remote at helm, and RC60 remote at transom
Misc: Blue Seas Add-a-Battery, SeaDek, Evolution Cover, Blue interior LEDs, 2 Attwood Underwater LEDs
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03-27-2013, 10:37 PM #4
Tom,
A solar charger doesn't work at night and generates far less power when overcast or the sun is well off axis. So it may not be much of a restoration device.
But as a maintenance charger it's okay. However, you have got to have a sophisticated charging module that can profile the battery and correctly respond. Voltage and current limiting will be important. For example, you do not want to continuously apply a 5 amp current to a fully charged battery for any length of time.
David
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03-28-2013, 04:12 PM #5
These particular units are the pedestrian every-day-joe all-in-one box solution and are also sold out there as a COLEMAN brand solar panel also.
I have personal first-hand experience with similar and/or identical units. The first one is the 5W panel and is the smaller of the two. I have used that panel as a backup cranking battery maintainer on a vintage Chris Craft powerboat. Its output is so small that it is generally suggested a charge controller is not necessary. I never used a charge controller on the smaller panel, although werre I to get another one, I would go ahead and buy a charge controller.
The second item you show does come with a 7A charge controller. It is a crude charge controller and I have burned one up in the past, but know I have two of that exact panel waiting to go onto my sailboat. The charge controller will do an OKAY job of managing current flow and will prevent cooking the batteries. I had this panel on the main house bank on the same wooden Chris Craft boat and it kept the house bank charged enough to stay up with the bilge pump that ran every 5 minutes. Thank goodness I did not burn up a charge controller on that boat or I would have sunk.
Let me point you in another direction though. Solar power is CHEAP right now. So much so that I have recently purchased two 40W panels to use at my lake spot. I am going to use them to power my outdoor lights, replacing the very inefficient and costly-to-operate low-voltage lighting transformers. Sunforce is bucking the trend and is NOT lowering their prices, so much so that they are not competitive in today's marketplace.
Here is a link to the 40W panel I recently bought: http://www.solarblvd.com/Solar-Panel...42238ff4b71b18
Here is a link to the very nice charge controller I recently bought: http://www.solarblvd.com/Charge-Cont...duct_info.html
For $111.16 plus freight, you can have a solar charging system that will replace lost juice at a rate approaching 3x what you picked out with the bigger of the two Sunforce brand devices, AND you will get a real Pulse Width Modulated charge controller, as opposed to the little device you get with the Sunforce.
Hope this takes you in a better direction and provides you with a more powerful, more rugged solution.
Phil
KickerLast edited by philwsailz; 03-28-2013 at 04:17 PM.
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03-28-2013, 04:16 PM #6
Here is a 15-watt panel for $18.00, just to put it in perspective
http://www.solarblvd.com/Solar-Panel...duct_info.html
I like the Sunforce stuff and except for the one burned controller I have had zero issues with it. that being said, there are way cheaper and/or more powerful ways to do it today....Last edited by philwsailz; 03-28-2013 at 04:22 PM.
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03-28-2013, 09:53 PM #7Member
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- Raleigh, NC
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Everyone thanks for the input. I'm going to use the set-up that Phil from Kicker recommended (Thanks for sharing your insight, Phil). I'm looking forward to tinkering with this stuff.
2008 Mobius LSV, 325 Assault, Acme 1433
Ballast: 1100s rear, 400 center and IBS plumbed on valve. 3 Johnson Reversibles.
Audio: 2 SKM10 subs and 6 KM6200s powered by Kicker IX1000.5, Pair REV8s powered by JL M4300 amp, Kenwood 440u head unit, RC107 remote at helm, and RC60 remote at transom
Misc: Blue Seas Add-a-Battery, SeaDek, Evolution Cover, Blue interior LEDs, 2 Attwood Underwater LEDs
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05-11-2015, 04:10 PM #8
I know this is a old post but I am looking at a solar set up for my boat because I too store mine at the lake with no power options. Would I need two separate setups to charge/maintain my dual batteries?
Boat-2004 Moomba XLV Gravity Games-owned since 11-2014
Tow Vehicle-2011 Silverado crew cab Z71
Location: Des Moines, IA
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05-11-2015, 04:34 PM #9
You really have two options. Get a properly-sized panel and charge controller like I shared above, and then add a Blue Sea Systems 7610 Automatic Charge Relay, (ACR) like shown here:
http://www.amazon.com/Blue-Sea-Syste.../dp/B000OTIPDQ
Or just buy two panels and two charge controllers. The nice thing about installing the Blue Sea ACR though is that you will charge, (or maintain, depending on what panel you get) both batteries by solar, but you ALSO will be able to charge both batteries while the motor is running.
Phil
Kicker