Is 1500V the new 1000V?
In the second quarter of 2011, manufactures of inverters and combiners began receiving certifications for meeting the updated UL1741-2010 standard, bringing 1000V listed products to the US market. Previously, only utility and behind-the-fence projects were able to install 1000V systems by using European inverters.
In addition solar panels, fuses, and disconnects have been UL listed to 1000V with their respective UL standards. European installations have been operating with 1000V systems for years, so it’s great to see the U.S. attempting to catch up.
The drive for increases to the DC system voltage is to reduce costs of wire and other balance of system components. With a higher voltage and more modules connected in series, more power can be transmitted on a given wire size and fewer source circuits are needed. The result? More efficiency. (more…)