Professional BoatBuilder had a nice article on sycronizing inverters a few months ago. http://www.proboat-digital.com/proboat/20080405/ Rusty _________________________________________________________________ Color coding for safety: Windows Live Hotmail alerts you to suspicious email. http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety_1 12008