Hi,
Newbie to SP stuff here
I have just bought 4 x 15w SP (Maplin £199) array to help charge my Motorhome batteries.
They are rated 3.42A @ 17.5V individually. Connected in // to a controller that has various outputs both physically & volt wise down from 12v.
Here's the prob; measuring unloaded each panel is 20v-22v in the shade & 22v-27v in direct sunlight. So when connected to controller it just does not switch on, over voltage I guess. Connect controller to a battery or battery charger etc. as input and switches on OK.
Connect all in // to a load and I'm getting 27v @ 4A i.e. 108 W. Is this magic?
What's going on? BTW not getting any ideas from manufacturer or dealer. Checked my voltmeter & OK.
Any ideas?
Regards
JK
Newbie to SP stuff here
I have just bought 4 x 15w SP (Maplin £199) array to help charge my Motorhome batteries.
They are rated 3.42A @ 17.5V individually. Connected in // to a controller that has various outputs both physically & volt wise down from 12v.
Here's the prob; measuring unloaded each panel is 20v-22v in the shade & 22v-27v in direct sunlight. So when connected to controller it just does not switch on, over voltage I guess. Connect controller to a battery or battery charger etc. as input and switches on OK.
Connect all in // to a load and I'm getting 27v @ 4A i.e. 108 W. Is this magic?
What's going on? BTW not getting any ideas from manufacturer or dealer. Checked my voltmeter & OK.
Any ideas?
Regards
JK