At Kinnovation Trading Pvt. Ltd., we often receive questions about the temperature inside our greenhouse solar dryers and how they differ from conventional open sun drying. Your curiosity drives our innovation, and today we’ll explain exactly why our technology delivers superior drying results.
Whether you’re preserving tomatoes, herbs, fruits, or spices, drying is about one thing — removing moisture quickly and hygienically while maintaining quality. Let’s take tomatoes as an example to compare greenhouse solar drying vs. open sun drying.
Higher Heat Intensity = Faster Drying
On a sunny day, the temperature inside our greenhouse solar dryer can reach up to 54°C — more than double the outdoor ambient temperature of around 26°C.
This high, consistent heat means:
- Faster drying times — reducing days to hours in some cases
- Better product quality — preserving natural color, nutrients, and aroma
- Lower microbial growth risk — because moisture is removed quickly
Result: Tomatoes dry faster and retain their flavor better than in open sun drying.
Works Even on Cloudy or Rainy Days
Rainy days are a nightmare for open sun drying, moisture in the air slows the process and risks spoilage. But inside a Kinnovation greenhouse solar dryer, heat is retained efficiently even under poor weather conditions.
On a rainy day, our dryers can maintain around 40°C, compared to only 20°C outdoors.
The enclosed environment also keeps out rainwater, dust, and pests.
Result: Farmers don’t have to stop production when the weather turns bad.
Continuous Drying — Even at Night
Thanks to the thermal mass and heat-retaining design of our greenhouse solar dryers, drying continues around the clock.
Even at night, indoor temperatures stay higher than the outside environment.
This shortens drying cycles and reduces the chance of product spoilage.
Result: Consistent, uninterrupted drying means faster turnaround and better product hygiene.
Hygiene & Food Safety Advantages
Open sun drying exposes produce to:
- Dust and dirt
- Birds, insects, and rodents
- Uncontrolled humidity and temperature swings
In contrast, a greenhouse solar dryer provides:
- Enclosed, dust-free drying space
- Protection from pests and contamination
- More uniform drying to prevent mold growth
This is especially important for businesses looking to meet quality standards for export markets or premium local markets.
Energy-Efficient & Eco-Friendly
- Uses free solar energy, lowering operational costs
- Reduces post-harvest losses — which is critical in perishable crops
- Cuts dependence on fossil fuels for drying, reducing carbon footprint
Real Impact in Nepal
At Kinnovation Trading, we have installed greenhouse solar dryers across Nepal — from Palpa to Chitwan, with expansion plans in high-altitude areas like Jumla. These systems have already helped 500+ farmers and entrepreneurs:
- Increase product value by producing premium dried goods
- Extend shelf life without chemical preservatives
- Access better markets with consistent, clean, and high-quality products
Conclusion
Compared to open sun drying, a Kinnovation Greenhouse Solar Dryer offers:
✅ Faster drying
✅ All-weather performance
✅ Around-the-clock operation
✅ Hygienic, market-ready produce
✅ Lower environmental impact
If you’re ready to take your food processing to the next level, contact us today to learn how our greenhouse
