one problem AKA "standard" is using system voltage
aka Nominal 12v panels, can be anything between 15~19v when working under load
with a VOC of 19~24v
and that doubles for 24v system panels using 72 cells
60 cell panels really are intended for grid tie systems and MPPT controllers to put power back into the grid
but I digress
you are correct,
CONTROLLERS should be rated at the thruput amps at the acceptable max panel voltage
None of this******saying its a 30 amp 12v system controller with a 390w panel limit
thats not 30amp thats 23amps?
i wonder why the limit ?
so you can't hit the max amp rating ?
because its false adv and IT really is a 24amp controller ?
there is a "Solar30" from Renogy on Amazon
http://www.amazon.com/Renogy-Controller-Regulator-Battery-Charging/dp/B00BCTLIHC/ref=pd_sim_86_3?ie=UTF8&refRID=0MT6B4H9HFAP4KTS49FZIdeal for: 12V PV system: 24V for Max input 360W Solar Panel, 24V PV system :48V for Max input 720W Solar Panel
except for the color its identical to this one from windy nation
http://www.amazon.com/WindyNation-Regulator-Controller-Adjustable-Settings/dp/B00JMLPP12/ref=pd_sim_86_3?ie=UTF8&refRID=0C461R3C7DNV492GWASDwhich says 390w panels
ideally my spare (when i find it) will be a true 40amp or larger controller
i have yet to go over 25amps with the new panels and the C40
but Solar conditions have been clear blue skys and hot weather
so by the time the sun is in position to give full radiance, the batteries are only taking in the "teens"
i got a 22.xx Pa reading about 10:AM, now reading about 12 amps
which will climb to about 16 amps in the next hour then taper from there
Sunday i will try for another full day test
will need to load up the batteries on Sat night, to bring down the SOC and up their acceptance level
the new panels have really helped my overall yield increase in this partial shade condition where the sun moves to the front of the RV in the afternoon
