Traceable topology
Eight strings of 17 modules, four strings per inverter, and one string connected to each MPPT circuit. Switch contacts are shown open by convention; they do not record operating state or establish safe isolation.
Engineering design example
Commercial rooftop PV single-line diagram
An A3 drawing of the 74.8 kWp PV example, covering strings, inverters, AC distribution, grid connection and monitoring.
Design example · Representative commercial rooftop PV arrangement.
Drawing sheet
Electrical architecture and design limits
The power and monitoring architecture is shown with its design notes and project-specific design inputs.
Drawing controls
What is defined and what remains open
One string per MPPT
The example uses one string on each MPPT. The Huawei 24-202401 data sheet gives 27 A/MPPT and 20 A/input. The supplied inverter revision and permitted input arrangement must govern final allocation.
Ratings remain project-specific
Cables, protective devices, fault duty, earthing, RCD, SPD, export control, fire access, and grid settings require verified project inputs.
Project drawing support
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