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Technical data for cleaning a 1.6 m2 PV panel

Heavy soiling: cleaning with water brush

Activity	Time / sec	Water volume / l	Solodon volume/g
Wetting	6	1,5	–
Foaming	6	1,5	15
Cleaning	60	12	–
Rinsing	15	4	–
Total	87 = 1,5 min	19	15

Recommended water flow: minimum 15 l/min

Light soiling: cleaning with the mop

Activity	Time / sec	Water volume / l	Solodon volume/g
Wetting	6	1,5	–
Foaming	6	1,5	5
Cleaning	25	–	–
Rinsing	15	4	–
Total	52 = 1 min	7	5

Calculation example per hour of cleaning work

Light soiling:

	Volume	Total value	Value / Module
Water consumption	400-500 ltr.	1,00 €	1,7 Cent
Solodon consumption (pink nozzle):	350g	7,00 €	10 Cent
Wages		35,00 €	58 Cent
Cleaned modules	60
Total			70 Cent

Heavy soiling:

	Volume	Total value	Value / Module
Water consumption	700-800 ltr.	1,50 €	3,8 Cent
Solodon consumption (pink nozzle):	350g	7,00 €	17 Cent
Wages		35,00 €	88 Cent
Cleaned modules	40
Total			109 Cent

Determing the water volume

Check the time you need to fill a 10 litre bucket with water from your hose.
Important: perform this test where you want to clean later. On the roof, water usually flows much slower from the hose than at ground level.

Water volume in l / min:

60 x measured time for 10 l in seconds
______________________________

10 l

We recommend a minimum flow volume of 15 l water / min.