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#573882 - July 13th 2012 1:48 pm Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
HomeBrew Offline
veteran

Registered: March 19th 2007 2:44 pm
Posts: 2092
Loc: Ohio, USA
Thats sweet! I keep tring to think of an affordable way to generate power while camping (without running a generator).
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#573948 - July 14th 2012 12:20 am Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
frscke1 Offline
carpal tunnel

Registered: June 26th 2010 7:35 pm
Posts: 8505
Loc: San Diego California
Well I just ordered a Unisolar 128 Watt Flexible Solar Panel PV Laminate roll up solar panel...and I got the Morningstar SunSaver SS-10-12v Charge Controller 10A 12V coming in on Monday...
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ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146 WB
'92 CHEVY G30 454 BEAUVILLE EXT 146 WB




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#573950 - July 14th 2012 12:29 am Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
wrcsixeight Offline
veteran

Registered: April 30th 2010 8:57 pm
Posts: 1941
Loc: San Diego
Quick, cancel one or the other.

I can't find the chart for the 128 watter but I am pretty sure it is a 24 volt nominal panel.

Connect that to a non MPPT charge controller, or one only rated for 12 volt panels, and you release the magic smoke!!


Edited by wrcsixeight (July 14th 2012 12:33 am)

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#573953 - July 14th 2012 1:06 am Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
frscke1 Offline
carpal tunnel

Registered: June 26th 2010 7:35 pm
Posts: 8505
Loc: San Diego California
Done, it is a 24 v system I had to email the seller and he is going to cancel the order....Now back to the search...cant cancel the controller its already on the way....
_________________________
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146 WB
'92 CHEVY G30 454 BEAUVILLE EXT 146 WB




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#573956 - July 14th 2012 1:20 am Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
frscke1 Offline
carpal tunnel

Registered: June 26th 2010 7:35 pm
Posts: 8505
Loc: San Diego California
That panel came up as I searched 12v systems.....so I made a asumption that it was a 12v system....thanks for the save 68....again
_________________________
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146 WB
'92 CHEVY G30 454 BEAUVILLE EXT 146 WB




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#574153 - July 15th 2012 2:15 pm Re: Inexpensive Solar. 100 watts 140$ [Re: wrcsixeight]
wrcsixeight Offline
veteran

Registered: April 30th 2010 8:57 pm
Posts: 1941
Loc: San Diego
Sorry for not getting back sooner.

I am a little confused by morningstar's product, and what it can handle as it says it is for 12 or 24 volt systems. I am not sure if a 24 volt panel would release the magic smoke, or if the controller would only output ~50% of the panel's juice. I would think for a 24 volt system it could handle a 24 volt panel, but whether it could step down the voltage and double the amperage as a MPPT type controller does is unlikely.

But it is best to be sure.

Generally 24 volt panels need a MPPT type controller and those are significantly more expensive than a PWM.

With a 10 amp charge controller I think you should look for a 12 volt nominal panel in the 180 watt or under range. But most panels over 140 watts are 24 volt nominal panels.

The open circuit voltages will be around 20 volts. The voltage at max power will be around 17.5.

If the 20 amper is not too much more and With Amazon's easy return policy, You might want to get the bigger controller just in case you find that your solar is short of your needs and you want to add another portable panel. But you can also just get another 10 amp controller and run them in parallel if more becomes necessary.

To take max advantage of the panels energy, you want to use pretty thick wire between panel and controller. At least 10 awg, and even 8 awg if you have 25 feet between controller and panel, one way.

http://genuinedealz.com/

Pretty good prices, free and fast shipping.

Also for ease of connecting and disconnecting the panel to the charge controller:

http://www.andersonpower.com/products/standard-powerpole.html

You do not want to bust out the screwdriver every time to connect the panel to controller.

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