[RE-wrenches] generator surge on outback system

[Kirk Herander, VSE]

Hello,

I have an off-grid customer with dual Outback inverters and a Kohler 8.5 RES
generator. When the inverter automatically shuts off the generator, we see
quite a surge (greater than 300 vac) in the house, before the switch to
batteries takes place. This trips their arc-fault breaker and causes their
flat-screen tv to power off and then back on. The generator people say this
shutoff surge is not uncommon (translation - they don't know what to do
about it), although I've never seen it to this extent.

 

Is there a way to automatically disconnect the generator before the turn-off
signal is issued, through programming? Does the programmable cool-down
function actually make the switchover before turning off the generator? Or
does it merely disable battery charging and do the turnoff / switchover at
the end of the cool-down period?

 

Kirk Herander

Vermont Solar Engineering

802.863.1202  fax 802.863.7908

VT RE Incentive Program  Partner

NYSERDA Incentive-eligible Partner

NABCEPTM    Certified Installer

 

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