cisumma
New Member
- Joined
- Apr 2, 2021
- Messages
- 126
Question:
I have 3 strings and each and I have never seen the PV volts at the MPP ever go above 80 volts total.
First , the three strings are in a definite " temporary overpanling " setup; meaning, lots of trees and panels are perpendicular; but, the sun is low for winter and all the panels face south with almost direct sunlight.
Overall, I expect bad performance; yet, each string should be capable of 710 watts and I have never recorded anything over 90 watts total at the MPP.
Furthermore, connections seem consistent; and, a typical string by string test showed three individual strings producing ( at any given moment as the sun transgress ) readings like ex: 90 volts, 48 volts, and 50 volts from each string respectively.
But the MPP never shows an accumulative voltage; however, it does seem to be constant with the reading from the highest strings volts.
But the output volts of the 2024 kw system never even come close to 80 volts total.
Definitely, this seems way to low even for an over paneling PV setup.
Thanks for any constructive criticism.
Solar panel specs I was working with:
24 v system
2024LV-mk
Mpp
Specifications: for Hansol 355 watt panels : 6 panels total.
Mono crystalline
Rated Power: 355W
Open circuit voltage (VOC): 47.8 V
Max power voltage (VMP): 39.2 V
Short circuit current (ISC): 9.65 A
Max power current: 9.06
Maximum system voltage: 1000V UL
Fuse Rating: 15 A
IP68 Junction Box with bypass diodes and industry standard solar connectors
Weight: 49.6 lbs
Dimensions: 78.5×39.37×1.58 inch
-_-_-_-_-_-<--_-_-_--_-_-_-_-_--_-_-_-_-_-_-_-_
expand...
VMAXTANKS AGM high performance batteries. Wide selection of top of the line deep cycle maintenance free batteries.
Battery bank consist of deep cycle SEALED lead acid batteries.
Vmax ah
4s2p = 400ah
24v system
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_--_-_-_
I have 2s3p for the 355watt panels.
3 strings
I have 3 strings and each and I have never seen the PV volts at the MPP ever go above 80 volts total.
First , the three strings are in a definite " temporary overpanling " setup; meaning, lots of trees and panels are perpendicular; but, the sun is low for winter and all the panels face south with almost direct sunlight.
Overall, I expect bad performance; yet, each string should be capable of 710 watts and I have never recorded anything over 90 watts total at the MPP.
Furthermore, connections seem consistent; and, a typical string by string test showed three individual strings producing ( at any given moment as the sun transgress ) readings like ex: 90 volts, 48 volts, and 50 volts from each string respectively.
But the MPP never shows an accumulative voltage; however, it does seem to be constant with the reading from the highest strings volts.
But the output volts of the 2024 kw system never even come close to 80 volts total.
Definitely, this seems way to low even for an over paneling PV setup.
Thanks for any constructive criticism.
Solar panel specs I was working with:
24 v system
2024LV-mk
Mpp
Specifications: for Hansol 355 watt panels : 6 panels total.
Mono crystalline
Rated Power: 355W
Open circuit voltage (VOC): 47.8 V
Max power voltage (VMP): 39.2 V
Short circuit current (ISC): 9.65 A
Max power current: 9.06
Maximum system voltage: 1000V UL
Fuse Rating: 15 A
IP68 Junction Box with bypass diodes and industry standard solar connectors
Weight: 49.6 lbs
Dimensions: 78.5×39.37×1.58 inch
-_-_-_-_-_-<--_-_-_--_-_-_-_-_--_-_-_-_-_-_-_-_
expand...
VMAXTANKS AGM high performance batteries. Wide selection of top of the line deep cycle maintenance free batteries.
Battery bank consist of deep cycle SEALED lead acid batteries.
Vmax ah
4s2p = 400ah
24v system
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_--_-_-_
I have 2s3p for the 355watt panels.
3 strings