2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.
Don't add a blocking diode.
@mcgivor The Epever controller will work, however if the panels are all in series the VOC is a little too close to its rated maximum. The better arrangement would be two strings ( two panels in series ) combined in parallel, the output dose not change just the VOC and VMP will be reduced. This will not be a problem with a 12V nominal system.VOC is the array, or module, voltage without load, this voltage will increase at lower temperatures. At -30°C 93.6V is close the maximum rated input of 100V, in the series / parrallel arrangement the VOC would be 46.8V so well within limits.VMP is the voltage when module is at maximum power. With series modules the VMP voltage is additive The MPPT controller will automatically find its maximum power point by tracking the constantly changing voltage, hense Maximum Power Point Tracking, MPPT. Practically all the information needed is in the learning center, take the time to read especially what's relevant to your application if there are questions by all means ask, as a beginner this resource is invaluable https://www.solar-electric.com/learning-centerThis link contains a glossary of terms used in solar discussion https://www.energy.gov/eere/solar/solar-energy-glossary
I am available for custom hardware/firmware development
Go ahead and put your 130ah battery in parallel with your pair of 210ah batteries.I dont wanna prematurly wear out the 2 new 6v because the 130 if 6months older ???I would stay parallel and use a PWM controller. 15.9Vmp is plenty for a 12V battery, even in lower light conditions (amps drop off but voltage stays almost the same).yeah thats what i lean toward doing. I ll just add blocking diodes to each panels. I am in the woods, trees and branch shadow half the panels through out the day, even more since the sun is lower now. I dunno how much more I would gain from going MPPT probably not much. That way I could keep my 1x 36cell 100w 17Vmp in parallel too.
Less load on batteries most 16 Vmp panels are fine for charging a 12V battery with PWM
Tracer 3215bn 150 voc 30 amp 400 watt $128
You really need to get the batteries to 14.4-14.8 volts (when charging, these are AGM batteries? these are not AGM...), and hold it for at least a few hours (24 hours scrolling to the manual, unless I am mixing up posters and their systems).At this point, you should charge the batteries on an account battery charger and get them fully charged.Trying to get the batteries back full with solar, when they are well discharged during cloudy winter weather and done dappled shade, it is just a losing game for now.@jonr
9am insert charge? What current?Bill
Removing trees is your fix. maple farm, not happrning. Anything else is a waste. not moving anytime soon, need power And in summer, if that sun is not above the tree line, you get nothing too. i didnt just install these. I runned them last summer and everything was fine.throwing diodes in your wires is not going to "make" power appear magically, i know its a parallel aray with lots of shade, didnt want.my.power to get lost in shaded panel they will steer power where you want it to go, but only the power that was generated at the panels. i know And every diode will waste power at heat, you will likey have to heat sink them too. .55v drop x _1.25_ amps = _.65___ summer .55 x 2.75 = 1.5w Not enough to careMy situation isnt an easy one you can solve by just dropping by and pointing the most obvious like captain insight in south park. I came to advance forum because i need advanced help. I bet you re the same mike as in solar-talk website.