50 kW solar photovoltaic array built in-house


PPE Technologies recently designed and installed a rooftop, on-grid, 50 kW AC solar array at its head office in Nelspruit, Mpumalanga. Based on a typical 25-year lifespan of a solar array and including annual de-rating of solar module efficiencies, the company stands to save a conservative, estimated 65% on electricity bills. The nature of the solar modules dictates that they de-rate progressively and a 25-year lifespan is typically attributed to them. After this period, the progressive de-rating in efficiency renders the array non-viable and the system is decommissioned. PPE Technologies made use of 168 Jinko Solar modules, split into twelve strings of 14 modules. These were tied into two ABB TRIO 27 kW inverters which operate in parallel and supply 400 V AC 3-phase supply to the existing main distribution board. All powder-coated mounting structures were manufactured in-house and a comprehensive lightning risk assessment and lightning protection design was carried out in-house with design approval conducted by channel partners, DEHN Africa.

Contact Brad Bense, PPE Technologies, Tel 013 752-3570, bradb@ppetech.co.za

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Source: EE plublishers

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