One issue solved..
which brings up another. After taking down the 4 panels, two are showing reduced voltage. One (Trina) has melted terminal ends inside the back cover and the other, a Boviet brand 255W panel, only shows 26Volts in direct sun, while my new (used) ones show 35+V.
I installed 4 slightly used 250 W panels and now show 65.7 volts, much better than the previous 52. (at the charge controller from the panels)
So, I have the option of buying one more 250Watt panel which would give me 4 extra panels (2 Hanwha 235W and 2- 250W panels).
As someone here suggested, should I put another set-up along side my existing one, which is like this?
I would buy another of the same controller, a SRNE ML2440 40Amp MPPT and use the same diagram as above. The + and - would also go to the battery terminals, obviously.
This would produce enough to keep the 4 L16 batteries happy all the time, correct?
It would seem a better choice than buying a bigger Controller as I would have no use for the current SRNE 40, (still fairly new.)
If I go this route, I may have to completely rearrange panel mounting as they are not on the roof but along side the house.
And if I do, does it matter that much if the panels are mounted vertically or horizontally? In my location (central Caribbean) they are near flat with a slight angle southward. Right now the 4 panels are vertical towards the south but if I add 4 more will likely have to place them horizontally...(which would be better for late afternoon sun.)
Thank you all for the help. It is impossible to find reliable information here!
8- 235Watt panels, 2 strings in series/parallel, 4L16 Deka 6Volt, 370AH FLA. batteries, 3000W Cotek pure sine inverter, SRNE ML2440 40Amp Controller & 40 Amp Renogy controller, 24 Volt system.
4 stand alone PV arrays; 12V gate opener, 24V Dankoff rain water pumping system, 12V Shurflo rain water garden pumping, 12V bathroom LED lighting and fan.
Honda EU3000W generator for backup.
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