When to use this calculator
Add chosen design open-circuit voltages for a series solar string. Enter a panel voltage already adjusted for the design temperature. This does not check equipment limits or select a string.
Explore the solar generation & value calculators for other questions in this topic. For a related calculation, use the Leak Water Loss Calculator: Estimate water lost through a continuous measured leak.
PUTTING IT INTO PRACTICE
Solar String Open Circuit Voltage: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Chosen per-panel design open-circuit voltage (V) | 50 |
| Panels in series (integer) | 10 |
| Result | 500 V |
- Check the input labels and enter the example values above.
- Apply the relationship: String open-circuit voltage = per-panel design Voc × series count.
- The result is 500 V, rounded for display.
How to interpret your result
Enter a panel voltage already adjusted for the design temperature. This does not check equipment limits or select a string.
Peak sun hours describe equivalent full-power sunlight, not total daylight. Self-consumption and self-sufficiency have different denominators. On-site use and exports may have different monetary values.
Frequently asked questions
Are self-consumption and self-sufficiency the same percentage?
No. Self-consumption divides solar used on site by solar generated; self-sufficiency divides solar supplying demand by total site demand.
When is the solar string open circuit voltage calculator useful?
Add chosen design open-circuit voltages for a series solar string. Enter a panel voltage already adjusted for the design temperature. This does not check equipment limits or select a string.
How do I use the solar string open circuit voltage calculator?
Enter chosen per-panel design open-circuit voltage (v), panels in series (integer). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
String open-circuit voltage = per-panel design Voc × series count.
What should I check before using the result?
Enter a panel voltage already adjusted for the design temperature. This does not check equipment limits or select a string.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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