Also, very significantly, the SMA Sunny Boy /
Sunny Island combos will taper charge when set up correctly.
Drake
At 09:53 AM 6/17/2017, you wrote:

August
Have used both SMA and OutBack inverters
for this application. One challenge with the
smaller generators is getting a true 60 hertz,
they fluctuate. The Sunny Boy can be programmed
to operate at a lower hertz range if SMA will
share the "secret code ". Recently did a
Outback system and the customer had a Propane
fired Briggs and Stratton gen set, two wire
start, works great. I understand why you want to use the matching SMA's.
Have fun
peter
----- Original Message -----
From: <mailto:[email protected]>August Goers
To: <mailto:[email protected]>RE-wrenches
Sent: Thursday, June 15, 2017 12:02 PM
Subject: [RE-wrenches] Generator choice for Sunny Island
Hi Wrenches, especially those of you who work on off-grid projects,
We have an upcoming off-grid project where we
will be powering a storage container with
electronics in it. The loads are mostly 120 volt
but there is a 240 volt heat pump that might
occasionally run. Weâre AC coupling the Sunny
Island with a Sunny Boy PV inverter. So, weâll
be installing a Outback PSX-240 autoformer to
bump the Sunny Islandâs output from 120 to 240 volt.
We need to select a generator for backup. We
need a two-wire electric start (in order to be
controlled by the Sunny Island) and preferably a
generator that is okay just running 120 volt
loads since the Sunny Islands input is only 120
volt. Something in the 3 kVA -7 kVA range should be fine.
Does anyone have experience or ideas about what
kind of two-wire start generator we might select?
Thanks,
August
Luminalt
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