Thursday, Nov 07, 2013 at 23:13
HI Shaker
IF you had to ask a panel supplier it is obvious you have very little electrical Knowledge on the subject
BUT the suppliers are correct,
if two arrays or parallelled panelsc are involved it is better to have them both connected to the one regulator
IF you read back carefully & try to understand what has been posted by Rocoe & myself you will see why !
It is simply because ONE regulator WILL reduce or shut off before the other AS THE BATTERRY APPROACHES FULLY CHARGED
BUT UP TO THAT POINT BOTH panels WILL put out there own available output
AGAIN provided they have been correctly wired & with very near the same VOLTAGE drop in their cables when under full load!!
NOW just to refer back again, this is only true if the regualtor is a PWM type
IF MPPT types , both regulators will go crazy tring to seek the Max Peak Power point
AN alternator reg is not a MMPT type, So as long as the panel also has a PWM reg, BOTH WILL WORK TOGETHER again up to the NEAR fully charged point
NOW if you do not understand the terms MPPT & PWM do a wiki search .
Solar DC is a lot more complex than many think simply because of the panels have some unusual charaeristics as power supplies !
Just one other point, some battery DC to DC chargers do not allow both sources to charge at the same time by the DESIGN OF THE CHARGER
BUT A simple VOLTAGE sensitive RELAY type battery isolator with good heavy wiring [for the distance & load current ]
will allow very effective combined charging when it is realy need
[LOW SOC batterries]
THERE ARE MANY, MANY OUT THERE, DOING JUST THAT
Myself included for over 30years
PeterQ
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