For 240 high-leg delta systems we typically use multiples of 3 SunnyBoys, which do not require a neutral connection. Without the neutral the high leg is not an issue. For smaller systems a single SunnyBoy also works well connected to phases A and C. While the utility company may not be a fan of this, in some cases it can actually restore imbalance since many buildings with 240 delta have few if any loads on the high leg.
Contrary to their manual, Power-One also claims their smaller PVI inverters are compatible with 240 high-leg delta. Garrison Garrison Riegel Project Manager | <http://www.solarserviceinc.com/> Solar Service Inc [p] 847-677-0950 | <mailto:[email protected]> [email protected] NABCEP Certified PV Installation Professional™ From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, October 17, 2013 10:49 PM To: [email protected] Subject: Re: [RE-wrenches] Fronius Installer Support Sucks- but who else? Chris Mason wrote: >SMA just came out with their Sunny Tripower line for the US. Yes those are interesting. But they are only for 480 Wye, not 240 Delta..... Is the Fronius 11.4-3 the only 3-phase inverter that can work with 240 3-phase with a hi-leg (stinger)?
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