[RE-wrenches] central vrs string inverters

[Allen Frishman]

Hi Wrenchers,
I am considering using 8 SMA Tri-power Inverters for a project with a 3 phase 208V Grid which means I have to add a step down transformer (480V to 208V).    I am comparing this option to a central inverter.    I have done many of the central inverter systems at the 208V but have yet to try the 20+ KW string inverters with the addition of a step down transformer.

I know that both systems have there own pros and cons and I will really appreciate some feedback from those that have experience doing both types.   

For the central inverter there are fewer inverters to malfunction however when one does the entire system is down.   In my experience the Central Inverters that I have used have been very reliable.       
- Anyone seeing reliability issues with the SMA Tri-power 20KW and 24KW string inverters?

Note:   My project is under NEC 2008.

All feedback is appreciated.

Al Frishman
AeonSolar

(917) 699-6641 - cell
(888) 460-2867
www.aeonsolar.com


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