Hello Wrenches, I am designing several 100KW systems for potential customers. My objective is the most efficient and reliable system possible. The system size seems to be right at the crossroads of either using one 100KW PV Powered inverter or a couple of Sunny Towers. According to CEC data, the overall efficiency of the SMA SB8000 w/transformer is about 2% higher than the PV Powered PVP100KW. Also according to the data, the new SMA transfromerless 10KW's efficiency is about 3% higher than the PVP100.
So, it seems that according to the data (assuming all other factors are equal) a couple of Sunny Towers with several transformerless inverters is the most efficient way to go. My questions to you are: 1) Is it really? Do any of you have any real world efficiency/output comparisons with a PVP100 (or similar) vs Sunny Towers? Any comments regarding reliability would be greatly appreciated. 2) How reliable are transformer-less inverters? We are located in FL, the lighting capital of the world (or at least the US). We have installed hundreds of SMA SB's with very few problems. Typically, non-transformer equipment is more susceptible to failure from power surges/lightning strikes. Any input regarding lightning and transformer-less inverters would also be greatly appreciated? Thanks, Wayne Irwin Director of Engineering Pure Energy Solar International Inc. State Licensed Solar Contractor License # CVC56695 wa...@pureenergysolar.com http://pureenergysolar.com 352 377-6527 Office 352 336-3299 Fax 352 316-1637 Cell The content of this message is Pure Energy Solar Confidential. If you are not the intended recipient and have received this message in error, any use or distribution is prohibited. Please notify me immediately by reply e-mail and delete this message from your computer system. Thank you.
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