Frequently Asked Questions
Questions and Answers about SunBrush® MOBILE PV Systems Cleaning
Q. What specs on the tractor are vital, weight?
A. The suitability of the tractor is determined by the width and weight. Working on a narrow based tractor, 3.5T will generally be capable of supporting the 5m brush.
Q. What strength is the steel that the frame is made of?
Q. Are there brackets mounted to keep firm in transport?
A. You will see in the image a bar that attaches from the end of the brush end to the rear implement. There is also following requirements for transport. It is recommended that you do not exceed 4kmh without securing the brush.
- Brush stowed to the transport position
- A locking pin on the small hydraulic cylinder
- Sling between long hydraulic cylinder
- Brush is to secured with a strap to the boom
- Bar secured from the brush end to the rear implement
Q. What is the expected life span of the brush?
Q. What is the cost of a replacement brush?
Q. What is required to change a 3 metre brush to a 5 metre?
Q. What is the additive that needs to be put in, .5 to 1l per 1000 litres, what is the cost?
A. Additive is determined by the hardness of the water. We recommend that this is tested onsite. Test strips can be used. Water hardness should be no more than 180ppm.

Hardness ppm (see figures below)
Additive amount (see figures below)
Soft: 0 to 60 ppm
125ml per 1000Lt
Moderate: 61 to 120 ppm
500ml per 1000Lt
Hard: 121 to 180 ppm
1000ml per 1000Lt
Very Hard
more than 180 ppm
Additive cost is $786.00 for 25 liters.
Q. Water usage is around 1000l per hour, is that right?
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