Solar panels age

How can you tell from the serial numbers on a panel when it was manufactured?
I located some 345 panels for 35 cents a watt claims they are new???
I don't have a clue on decoding but
Looks to me like it could be January 4th 2017.
Or April 3rd 2013
Or August 2nd 2014.
I located some 345 panels for 35 cents a watt claims they are new???
I don't have a clue on decoding but
Looks to me like it could be January 4th 2017.
Or April 3rd 2013
Or August 2nd 2014.
2kw array 6 345 q cells make sky blue 60 cc
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
Comments
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
So your
https://d3g1qce46u5dao.cloudfront.net/data_sheet/q_plus_l_g4_2_335_345_datasheet.pdf
So January of 2017 1st revision and the panels ranged in voltage from 335-345watts.
Panels tend to get more efficient in later generations, I thin that series was 340-350 watts before it was no longer manufactured. I have an earlier series that I believe are the same form factor That are 310-330 watts. I picked them up from a commercial installer and I think that installation was in 2017 if that helps.
but still a good price for a ~3 year old panel with a 12 year warranty.
if they pass a voc and isc test?
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
I have had some 70 watt and 135 watt panels on my sale boat since 2000 .
Only had to drive 30 miles
Round trip
much cheaper than shipping.
Now the work begins racking.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
2100 watts*.77/48 volts. 33 amps.
230 ahs *58volts /.77*12% 2078 array.
If I have it wrong would someone please show me the correct way.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
I am planning to use 3s2p 6 345 watt
Panels 2070 watts.
so my array is to large for my batteries?
And just 3 panels in series 1035 for a 230ah 48 volt bank is to small?
Should I use only 4 panels 2s2p
And series parallel my batteries
For 460 ah at 24 volts?
Decisions!!! so far I've only used a 12 volt 400 watt system.
Bigger systems seem so much more complicated.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
But Is this the correct way to wire for 48 volts?
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
You need to check the panel voltage 3 340watt panels have to much voltage for your controller .
Photowhit also has informed me of the consequences of 3 345 panels in series.
The above 48 volt diagram of 8 6 volt batteries. 3 cables are long and 4 are short. I thought all. Cables should be the same length?
Which way is better? This certainly looks simpler.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
Correct me if I'm wrong.
230 ah at 48 volts or
460 ah at 24 would still require the same size array for 10-13% charge rate.
Are my 6 345 ~2100 watts a good match for my 11kw of batteries?
With My calculating I get 12%?
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
Here's my take from it.
It's hard to throw a mismatch of parts together and make it work correctly.
A Johnny cash Cadillac of sorts.
My controller panels or batteries dont match. But the price was right.
I have 2 solutions both of which involves losing the make sky blue.
1. Buy a 60 amp pwm controller with panels 2s3p
Buy a combiner and 3 50 foot runs of array wiring and breakers.
2. buy a quality mppt 60 amp controller that can take 3 345 watt panels in series. 3s2p
That will throttle back the wattage
to my smaller battery capacity.
While producing more power during
Low light situations.
Cost would be negligible
Between mppt and pwm.
With the extra components for pwm.
Combiner box and breakers. extra wire
and more complex installation.
@wellbuilt I think I finally understand
battery ah to array size.
330ah battery *49 volts =16170 watt hours *.13% 2100 watt array.
Anyone have a link to battery wiring
diagrams?
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
would be to try to get to 48 volts some how .
The fm 80 and fm 60 have a 100$ price difference .
Its 12-24 volt only.
I have the make sky blue controller. The s3-60a.
Im guessing the epever is still in my equipment list because i haven't been able to see mine or anyones for some time now?
So I'm not able to change it.
I think something about the forum changed.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion
and the voltage of 2 panels in series may not be high enough to charge a 48 volt system in warm weather .
Not one I would have bought because
Ive read a lot of bad reviews on this cc.
If it last till mid January I'm gonna test its limits.
6 230ah GC @36 volts
18 amp accusense charger. 3650 champion