Process¶
Solar Panel Testing Log — Voc Measurements (Cloudy Day)¶
Test Purpose¶
To verify the operational status of individual flexible solar panels before electrical integration into the wearable solar garment project.
The goal of this test was to measure open-circuit voltage (Voc) under real ambient daylight conditions and identify panel performance spread for later series grouping.
Test Conditions¶
- Date: [fill in]
- Location: Dilijan, mountainous area
- Weather: Overcast / cloudy
- Sun visibility: No direct sunlight, diffuse daylight only
- Test type: Open-circuit voltage (Voc)
- Load: None (multimeter only)
- Measurement tool: Digital multimeter (DC voltage mode)
- Panel state: Not connected to each other
- Panel orientation: Hand-positioned toward brightest sky area
- Shading: None intentional, but ambient cloud cover present
- Temperature: [optional — if known]
Note: Values are expected to be lower and more variable than nominal ratings due to cloud cover and changing light angle.
Panel Groups Under Test¶
The project uses three panel sets:
- 1.5 V / 0.3 W panels — 10 pieces total (two strings of five planned)
- 2.0 V / 0.5 W panels — 4 pieces planned for one string
Measurement Method¶
For each panel:
- Multimeter set to DC voltage.
- Probes connected directly to panel terminals.
- Panel oriented toward brightest available daylight.
- Voltage allowed to stabilize for ~2–3 seconds.
- Maximum observed stable value recorded.
- Measurement repeated once if reading fluctuated.
Results — 2.0 V Panels (Nominal)¶
| Panel ID | Measured Voc (V) | Notes |
|---|---|---|
| 2V-01 | 1.73 | Stable |
| 2V-02 | ~1.6–1.7 | Stable |
| 2V-03 | ~1.4–1.6 | Stable |
| 2V-04 | 1.14 | Lower but usable |
| 2V-05 | 0.75 | Significantly lower — set aside for retest |
Summary — 2V Group¶
- Most panels performed within expected cloudy-day range
- One panel showed reduced output
- No zero or negative readings
- No instability observed after repositioning
Conclusion: Group operational, one candidate for retest in direct sun.
Results — 1.5 V Panels (Nominal)¶
| Panel ID | Measured Voc (V) | Notes |
|---|---|---|
| 1.5V-01 | 1.78 | Strong |
| 1.5V-02 | ~1.7 | Stable |
| 1.5V-03 | ~1.6 | Stable |
| 1.5V-04 | ~1.55 | Stable |
| 1.5V-05 | ~1.50 | Stable |
| 1.5V-06 | ~1.48 | Stable |
| 1.5V-07 | ~1.40 | Moderate |
| 1.5V-08 | ~1.32 | Moderate |
| 1.5V-09 | ~1.20 | Lower |
| 1.5V-10 | 1.01 | Lowest — flagged |
Summary — 1.5V Group¶
- Majority clustered between 1.4–1.8 V
- One low-output panel identified
- Spread consistent with:
- diffuse light
- angle variation
- manufacturing tolerance
Conclusion: Panels functional; suitable for sorted series grouping.
Observed Variability Factors¶
Voltage variation likely influenced by:
- Cloud density changes during measurement
- Panel angle relative to sky brightness
- Hand positioning inconsistency
- Manufacturing tolerance between micro-panels
- Momentary probe contact differences
Quality Classification (Preliminary)¶
High Output Tier¶
Panels measuring near top of their group range
→ Preferred for same-series connection
Medium Output Tier¶
Panels within ~15–20% of group average
→ Acceptable for series use
Low Output Tier¶
Panels significantly below group cluster
→ Marked for:
- retest in direct sunlight
- backup use
- non-critical placement
Engineering Decision After Test¶
Proceed to:
- Sort panels by measured Voc
- Build series strings using voltage-matched panels
- Exclude lowest performers temporarily
- Retest flagged panels under direct sunlight before final rejection
Next Planned Tests¶
- Repeat Voc measurements in direct sunlight
- Measure series string Voc after soldering
- Perform partial shading response test
- Measure loaded voltage after charge controller connection
- Log current (Isc or loaded current) if meter supports it
Status After Today’s Test¶
✅ Panels confirmed operational
✅ No dead units detected
✅ Sufficient performance for prototype stage
⚠️ Two panels flagged for retest under stronger illumination
Slide show¶
Embed your presentation
Story telling script¶
My sketches for the story telling session tell a story about my concept and lead to the final outcome in..
- scene 1 the scene opens with a room full of flowers
- scene 2 we zoom into the lady wearing a plant based dress
- scene 3 she comes out from behind the plants
- scene 4 ... whats next?
A good exaple of story telling sketches are from ...Florencia Moyano https://class.textile-academy.org/2022/florencia-moyano/finalproject/prefinal03/
FABRICATION FILES¶
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
This model 1 was obtained by.. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. The laser cut nesting 2 was created using..
footnote fabrication files
Fabrication files are a necessary element for evaluation. You can add the fabrication files at the bottom of the page and simply link them as a footnote. This was your work stays organised and files will be all together at the bottom of the page. Footnotes are created using [ ^ 1 ] (without spaces, and referenced as you see at the last chapter of this page) You can reference the fabrication files to multiple places on your page as you see for footnote nr. 2 also present in the Gallery.
Code Example¶
Use the three backticks to separate code.
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
How-Tos & Tutorials¶
Upload templates or tutorials you created for your personal project, it can also be links to instructables when the project is educational, protocols when working with growing materials and so on..