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What do you recommend for the cleaning and maintenance of your inverters? (e.g. particular measures and how often)
The necessary measures and frequency of these measures depend on the type of inverter, its protection class and the ambient conditions (particularly dust or fine particle exposure).
The fan guards on the string inverters (SolarMax S and MT series) should regularly be checked for soiling and cleaned if necessary in order to guarantee optimal cooling capacity. This procedure can also be carried out by the device operator. Maintenance of the central inverters may solely be carried by qualified electricians. The information in the respective device documentation should be observed.
What are the suitable ambient conditions (e.g. keep room dust-free)? Are there any special recommendations for rural locations?
The place of installation should be kept as dust-free as possible. Installing the inverter in barns, joineries, etc. is not recommended. Furthermore, installation in areas with a strong ammoniacal air content should be avoided. The conversion of direct current into grid-compliant alternating current takes place through high-frequency switching processes, which lead to noise emissions. Although this poses very few problems in practice, it should be ensured that the inverter is not positioned within direct proximity of noise-sensitive animals (e.g. dogs) when selecting an installation site.
What services do you offer for the cleaning and maintenance?
Maintenance requirements are strongly dependent on the protection class of the inverter. Inverters with a high protection class (e.g. IP 54) are mainly protected against internal impurities and therefore an external check of the cooling element and fan is usually sufficient. Inverters with a low protection class which have no or minimal dust guard protection, are naturally more sensitive. If, in spite of a supposedly "clean" installation site, significant soiling emerges over the course of the year, it is recommended that you contact our service centre. If necessary, a trained service technician can clean the device and therefore extend the service life of the inverter. However, it is of course advisable to avoid such impurities from the very beginning.
In your experience, are inverters generally well maintained or is this topic somewhat neglected?
Within the scope of our servicing jobs, we usually find that the devices are significantly soiled. Under such unfavourable conditions, a long service life is unlikely. As the devices contain circuit boards with lots of small electrical components, cleaning becomes relatively difficult. If a device operator recognises that the installation site will not be adequately clean on the long-term, it is advisable to increase preventative protective measures in order to avoid a premature and difficult cleaning process.