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GENERAL DESCRIPTION
Largely independent from their Peak-Power (Wp), photovoltaic installations can differ dramatically in their electricity production (kWh); there is a nagging issue of inefficiency related to the installation itself: other than the typical consideration like climate, latitude, roof inclination and array orientation, the so-called mismatch losses need to be accounted for as well.
These losses are not of academic concern but constitute a problem to be solved, whereas partial shading represents the most common of mismatch losses (10% of shade may reduce more than 50% of an array’s power). Ehw enters the market with the first industrial solution, the Smart Power Box™.
WHAT IS THE SMART POWER BOX™
The PV modules are hooked up individually into the Smart Power Box™, similar to today’s distribution boxes. The notion of string disappears.
PERFORMANCE PARETO OF 115 ARBITRARILY CHOSEN SITES IN THE SOUTH-EAST OF FRANCE FROM FEBRUARY 2009
Over and beyond peak power alone the return on investment of a photovoltaic installation depends largely on each site’s specificities, whereas obstacles (the most prominent are chimneys, trees and neighbourhood) can result in a largely reduced return.
Source : www.bdpv.fr from march 23th 2009.