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JED THE SPREAD
02-11-2013, 18:39
Hi Guys

We are heading off into the wilds again in 6 weeks time. Although CampervanCulture.com are dealers for Sterling Power we appreciate the value of battery health. This time we are heading to North Africa and time is running out getting our VW 4x4 camper vans ready so it is time to get the professionals in (not Bowdie and Doyle). We chose Huw Matthews (http://reluctantcampervanner.wordpress.com/off-grid-solar-installations/) because his credentials were really impressive, he spent a year and a half fitting solar installations in Afghanistan as a contractor (none military). He is also a nice guy, Welsh and drives a T4 Syncro Campervan so he was always going to get the job really.


Huw installed solar power....


https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-prn2/1385579_535818553168519_1539078407_n.jpg

http://i1282.photobucket.com/albums/a524/CampervanCulture/G0020968_zpsb1d0fbcc.jpg (http://s1282.photobucket.com/user/CampervanCulture/media/G0020968_zpsb1d0fbcc.jpg.html)

http://i1282.photobucket.com/albums/a524/CampervanCulture/G0020969_zps8505fe09.jpg (http://s1282.photobucket.com/user/CampervanCulture/media/G0020969_zps8505fe09.jpg.html)

http://i1282.photobucket.com/albums/a524/CampervanCulture/GOPR0988_zps2fa5eb74.jpg (http://s1282.photobucket.com/user/CampervanCulture/media/GOPR0988_zps2fa5eb74.jpg.html)


Just though I share the love incase any of you guys are short of time or need a recommendation.


We are going to be making a film of the trip and obviously posting in the photography section as usual on the forum. Hope you guys will follow us on our journey.

Jed

vwalan
02-11-2013, 19:07
hope you are altering that roof rack and losing that box . they are in alot of shade .
seem very small as well.

maxi77
02-11-2013, 19:34
hope you are altering that roof rack and losing that box . they are in alot of shade .
seem very small as well.


My thoughts as well, even the smallest shadow will cut your output by 80%. How good they are for size will depend very much on your power consumption really is

JED THE SPREAD
02-11-2013, 19:47
My thoughts as well, even the smallest shadow will cut your output by 80%. How good they are for size will depend very much on your power consumption really is


Sure am guys. Huw advised me to move it back a couple of holes on the side section, its been added to the list before we go.

Jed

vwalan
02-11-2013, 19:53
cant have too much solar working for you.
might see you along the med coast . cant miss us . my artic and my mates purple daf ,we do try to blend in but dont ,ha ha .

CooP
03-11-2013, 08:22
So sorry i am not qualified at all but those panels look to be mounted completely opposite to everything I have read on the subject. Are you happy with the installation performance? What sort of output are they currently giving, say at mid-morning? Are they maintaining the charge on the batteries during a normal day/night cycle of use?

JED THE SPREAD
03-11-2013, 10:55
When using ohms law the panels will provide a 3.3W charging current. This is not a true value for the charging current. The Iop (working current) is calculated using STC (standard test conditions) where the temp is 25C, Airmass is 1.5 and the sunlights performance is 1000W/m2. Therefore the Iop for each 20W panel is 1.2A. 1.2 +1.2= 2.4A. hope this clarifies things.

Jed

hextal
03-11-2013, 11:34
Are there any issues with loss of efficiency due to heat?

My understanding was that panels are best fixed an inch or two clear of the van to allow for better cooling (though I've not seen comparison between the two approaches in terms if performance, so difference may be negligible ).

CooP
04-11-2013, 17:08
When using ohms law the panels will provide a 3.3W charging current. This is not a true value for the charging current. The Iop (working current) is calculated using STC (standard test conditions) where the temp is 25C, Airmass is 1.5 and the sunlights performance is 1000W/m2. Therefore the Iop for each 20W panel is 1.2A. 1.2 +1.2= 2.4A. hope this clarifies things.

Jed

Thanks for the speedy reply. Is this what the book claims or is this the actual? Will this be adequate to maintain your batteries or have you not yet had a chance for a proper field test?


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