Skilancer Solar is the brainchild of IIT Jodhpur alumni Neeraj Kumar with 3 years of work experience in the solar industry and Manish Kumar Das, an instrumentation engineer with 10 years of experience. The company specialises in providing permanent professional cleaning services [MCS] of solar panels of commercial parks and establishments. Some of our clients include Hindustan Petroleum, Adani, Ambit Energy and Unilink Group.
The solar module in order to produce power requires direct irradiance (meaning that this light is directly coming from the sun).However, other than internal factors (such as refractive index of glass, refractive index of EVA, composition of glass, etc.) there are various external factors as well which affect the amount of irradiance entering the solar module. One such factor is soiling and the loss of power associated with such factor is known as soiling loss. Soiling refers to accumulation of soil, dust particles, etc. on the solar module. This soil accumulation hampers the solar irradiance to pass into the solar module. This primarily leads to reduction of power output from the solar module. This reduced power output may remain till the module is cleaned which may not be soon enough. The result of soiling is that it leads to loss of money if not tackled properly. The effect on plant owner would be they would lose money due to reduced energy generation. Hence it is important to understand the factors effecting soiling, the factors that necessitate cleaning cycle.
While the above mentioned parameters are important as they give information on how soiling loss occur and the factors which affect them. With soiling in place on the module, it is important to clean such modules to regain its power output. However there are few crucial factors which affect cleaning cycle. These factors are as follows:
We can safely say that soiling has adequate impacts both at plant and module level. Thus it is important to keep the plant clean. However for number of cycles per week/month, one may keep it after a thorough evaluation of performance, cost and availability of resources. It is also suggested that the cleaning of power plants are carried out only by distilled water and/or suggested liquid by the module manufacturer/EPC provider. Additionally, we have seen many cases where performance of plant is gauged by its Performance Ratio (PR)(a ratio of how efficiently the plant is performing to the expected value). In few of those plants, we have seen that there is dust settlement on the irradiance meter (pyranometer) as well. Many a cases, these meter are located at such places where cleaning them may either be difficult or forgotten as it is unnoticeable. This decrease offsets the decrease of energy output of plant and the PR of the plants almost remains constant. Thus it is suggested that proper cleaning cycle is undertaken of such meters as well.The underestimation of soiling losses is due to a particularly stealthy effect. In most cases, the irradiance sensor suffers from the same amount of dirt that is covering the solar PV panels. Consequently, the measured irradiance level decreases, despite the actual irradiance remaining the same. The decrease in measured irradiance balances out the decrease in electricity generation of the panels, thus the PR does not change, effectively hiding the losses.
Fully‐automated cleaning devices are installed on each row of a PV system and are stored at a parking station at one side of each row. They are programmed to move along a single module row only. Most of the devices have an error detection system and take weather conditions in consideration before they operate.
All fully‐automated products operate with an on-board battery, although some devices may be additionally charged by their own PV modules. Fully automated devices may have an additional railsystem installed; obstructions between tables (space, steps and tilt) must be taken into account. As the name implies, fully automated devices do not require any manual labour for the cleaning process or for the positioning of the devices. Fully‐auto‐ mated devices can also operate during the night.
|Comms 1||LoRa wireless|
|Comms 2||SCADA integration|
|Program||Fully programmable cycle|
|Supply||10-20W solar panel|
|Storage||20Ah/14.8V Li-ion battery|
|Retrofit||Bracket mounted rail|
|Panel Overhang||< 600 mm|
|Clean rate||0.3-0.6 m/s|
|Row length||> 1 Km|
|Row facewidth||1-6 mtr|
|Full Automatic||Daily cleaning/On demand|
|Semi-Automatic||2 operators per schedule|