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Field Testing of Salt Layer

How can Solar Glass Shield help resolve the issue of salt layer formation or hard water marks? A partial-coating test on two panels at a plant suffering heavy salt deposition.

Test
Salt layer / hard water marks
Product
Solar Glass Shield
Method
Partial coating, 2 panels
Outcome
No salt bonding on coated area
Solar Glass Shield field test sheet, salt layer formation
Background

A thick salt layer that took heavy manpower to remove

Salt was depositing on the modules as a thick layer and needed excessive manpower to remove. Generation dropped, and every cleaning cycle carried a heavy cost in labour and time.

Scrubbing hard enough to lift the deposit also risks the glass surface, so the site needed a way to stop the layer from bonding in the first place.

Result

Salt formed everywhere except the coated area

Solar Glass Shield was applied on two separate panels partially. When checked, the panels were coated with the salt layer all over again, except for the area that carried the Solar Glass Shield.

The salt could not stick or form a layer on the coated patch, which stayed clear and visibly darker than the surrounding glass.

2
Panels partially coated for the test
0
Salt bonding observed on the coated area

Observations at a glance

Parameter
Uncoated area
Coated area
Salt layer formation
Thick layer re-formed
None on coated patch
Bonding with glass
Salt bonded to surface
No bonding
Cleaning effort
Excessive manpower
Wipes off easily
Surface clarity
Opaque, chalky
Clear, cells visible
Generation impact
Reduced output
Output retained
Conclusion

Solar Glass Shield is effective in protecting a solar plant from hard water mark formation. Panels can be cleaned easily, as salt and dust cannot form any bonding with the glass.

Rows of ground-mounted solar panels under a clear blue sky

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