00slk
Senior Member
- Joined
- Dec 1, 2012
- Messages
- 10,052
- Reaction score
- 10,018
- Location
- Cambridgeshire UK
- Your Mercedes
- 2002 SL55 AMG, 2005 E320 CDi, 2014 SLK250 CDi, 2003 SLK200
I had a 2.5, but it was a v8 in a mk2 daimler
Hi,I wonder if the output would be greater if it had been bonded flush to the rear window?
Although, having had a CLC, the driver's view out of the rear window is very poor anyway.
The SolarFrontier panel I have in France puts out 110v. You treat it with a great deal of respect!At 138 ma max i personally wouldnt even bother ... Even in direct sunlight you wont get close to that figure, add some shade and its gone ! It may raise the voltage but the amount of current going into the battery will be neglible ?
Up to 21v is a common voltage for 12v solar panels.
I have 210w of panels at around 21v through a mppt solar charge controler so it converts all 21v to current . cheap charge controlers just block above 14.8v and dump the rest as heat.
On a overcast day it can be as little as 0.5 amps ! On a sunny day i may see around 8 amps.
A 100w panel in the real world will give around 3.5 amps when nice and sunny.
Solar panels should have a diode and nowadays most have one already fitted to the back of the panel because if not when night comes the battery will then feed back to the panel.
A rule of thumb is a panel can be up to 10% of the battery capacity before a charge controler is recomended.
Do you have a multimeter? You could connect it to your solar panel on a sunny day and connect the panel direct to your battery and see how many amps it is really producing.