Good day!
I am installing SMA Sunnyboy 7.7 (SB7.7-1SP-US-40) with 24 modules (CS3U-380MS KuMax 380W 144 split cell Mono PERC 35mm T4).
The array is quite far from the electrical panel (80 m-inverter by the electrical panel not array) therefore to keep the wire cost down, I wanted to use 2 inputs on the inverter:
A||B (A and B in parallel) and C. Instead of standard A, B, C to avoid running 6 wires.
2 strings of 8 modules combined on A||B and 1 string of 8 on C input. All checks below:
sma 8x2 + 8.jpg
For A||B I will be having combined homerun of 2 wires (pos and neg).
My question is:
How to properly connect my homerun for A||B inputs in parallel?
Are there any settings that needs to be changed in the inverter?
Thank you so much in advance!
Bartek
I am installing SMA Sunnyboy 7.7 (SB7.7-1SP-US-40) with 24 modules (CS3U-380MS KuMax 380W 144 split cell Mono PERC 35mm T4).
The array is quite far from the electrical panel (80 m-inverter by the electrical panel not array) therefore to keep the wire cost down, I wanted to use 2 inputs on the inverter:
A||B (A and B in parallel) and C. Instead of standard A, B, C to avoid running 6 wires.
2 strings of 8 modules combined on A||B and 1 string of 8 on C input. All checks below:
sma 8x2 + 8.jpg
For A||B I will be having combined homerun of 2 wires (pos and neg).
My question is:
How to properly connect my homerun for A||B inputs in parallel?
Are there any settings that needs to be changed in the inverter?
Thank you so much in advance!
Bartek
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