PV string voltage checks
How to prepare module, temperature and inverter limit inputs before using the Australian PV string voltage calculator.
String-check purpose
PV string voltage work starts with product data. The calculator can show whether the entered module count creates cold Voc and operating-voltage values that sit inside the entered equipment limits, but it does not decide product compatibility.
The useful output is a traceable voltage record tied to a module model, inverter input and temperature basis.
Workflow
- Record the module model and datasheet revision.
- Collect Voc, Vmp and voltage temperature coefficients from the module data.
- Record the inverter maximum DC input and MPPT voltage range for the input being reviewed.
- Enter module count and temperature assumptions in the calculator.
- Carry the voltage margins into project review with the product sources attached.
Record table
| Field | Record | Review concern |
|---|---|---|
| String reference | Array, tracker or string label | Keeps the result tied to a physical design |
| Module data source | Exact module datasheet | Similar modules can have different voltages |
| Temperature basis | Cold and hot assumptions | Voltage moves with temperature |
| Equipment limit | Inverter or device voltage limit | Must match the reviewed input |
| Voltage margin | Calculated distance to entered limit | Does not replace compatibility review |
Boundaries
- Do not reuse module data from a similar product.
- Do not treat MPPT range as the only compatibility question.
- Do not hide the temperature basis used for cold and hot checks.
- Do not turn a voltage margin into a DNSP or product approval.