Conext MPPT 60 150 Array to close to max?

Hello, I am Just about ready to set up the Panels and wanted some feed back and if I am setting it up correctly.. Kind of a second look..
I am using ITEK 305w Panels 3 Modules in series and 5 Strings for a total of 15. Am I to close to max of the controller? and if I am what would be a better way. I live in the Upper Peninsula so it does get cold but the sun is low for those months. .looking for some feedback so i don't let the smoke out...
Power: 305 Watts
VOC (Open Circuit Voltage): 40 Volts
VMP (Maximum Power Point Voltage): 33.1 Volts
ISC: (Short Circuit Amperage) 9.8 Amps
IMP (Maximum Power Point Amperage): 9.1 Amps
VOC Temp Coef %: 0.29 C°
VMP Temp Coef %: 0.38 C°
VOC (Open Circuit Voltage): 40 Volts
VMP (Maximum Power Point Voltage): 33.1 Volts
ISC: (Short Circuit Amperage) 9.8 Amps
IMP (Maximum Power Point Amperage): 9.1 Amps
VOC Temp Coef %: 0.29 C°
VMP Temp Coef %: 0.38 C°
Environmental Data
Coldest Ambient Temperature: -40 C°
Hottest Ambient Temperature: 90 C°
Nominal Battery Volts: 48 Volts
Coldest Ambient Temperature: -40 C°
Hottest Ambient Temperature: 90 C°
Nominal Battery Volts: 48 Volts
PV Array
Number Of Modules In Series: 3
Number Of Parallel Strings: 5
Total Modules 15
Rated PV Array Power: 4575 Watts
Anticipated Array Power @ 90C: 3445 Watts
Rated PV Array Current: 45.5 Amps
Battery Charging Current @ 57.6 V: 79.4 Amps
VMP (Maximum Power Point Voltage) : 99.3 Volts
VOC (Open Circuit Voltage): 120 Volts
VMP @ -40 C°: 123.9 Volts
VOC @ -40 C°: 142.5 Volts
Schneider Conext 60 150
Max Operating Voltage 140
Max Non operating VOC (HyperVOC) @ 48V Nominal Battery Voltage 150
Maximum Number Of Modules In Series 3
Max Number Of Modules In Series (Using HyperVOC) 5
Based On This Current Configuration 60 150 from the manual
Number Of Modules In Series: 3
Number Of Parallel Strings: 5
Total Modules 15
Rated PV Array Power: 4575 Watts
Anticipated Array Power @ 90C: 3445 Watts
Rated PV Array Current: 45.5 Amps
Battery Charging Current @ 57.6 V: 79.4 Amps
VMP (Maximum Power Point Voltage) : 99.3 Volts
VOC (Open Circuit Voltage): 120 Volts
VMP @ -40 C°: 123.9 Volts
VOC @ -40 C°: 142.5 Volts
Schneider Conext 60 150
Max Operating Voltage 140
Max Non operating VOC (HyperVOC) @ 48V Nominal Battery Voltage 150
Maximum Number Of Modules In Series 3
Max Number Of Modules In Series (Using HyperVOC) 5
Based On This Current Configuration 60 150 from the manual
"Each Conext MPPT Solar Charge Controller (solar charge controller) must be
connected to its own PV array. Although the solar charge controller can harvest a
maximum of 3500 W, the PV array size can be as high as 6720 W (based on
48 A × 140 Voc = 6720 W)."
connected to its own PV array. Although the solar charge controller can harvest a
maximum of 3500 W, the PV array size can be as high as 6720 W (based on
48 A × 140 Voc = 6720 W)."
BTW I am using Forklift Battery 24-85-15 900ah
Conext XW 6848 Inverter
Comments
The bottom line is it will work and the mppt will be current limiting alot. Might be a good idea to plan a second mppt down the road.
Is this for offgrid? If so less of a problem now. In summer offgrid, you could just remove a string to lower the temp of the CC when in Bulk.
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60a capacity into a 900ah battery bank is a bit on the low side for full time off-grid, but in your location I assume you're ready and willing to spark up a generator as needed.
The cold VOC margin is a bit skinny, but it seems to me we don't get really cold winters any more. Something to be aware of though, so if it did get really cold you'd want to open PV in breaker the night before if a really cold low was forecast.
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
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E-mail [email protected]
The problem would generally be around first light, when record lows are typically recorded. There's just enough ambient light to get voltage up but not hitting panels directly yet. That's why I suggested opening the pv in breaker the night before in the (probably unlikely) event really cold weather is expected.
Once the direct sun warms the panels, voltage would drop, and you could then start charging.
I'm north and west of you. Record low here is -47°F, but we don't seem to get into the -40s much at all any more.
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
http://members.sti.net/offgridsolar/
E-mail [email protected]
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
http://members.sti.net/offgridsolar/
E-mail [email protected]