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<p>I didn't watch the whole thing, but it looked like a standard AC
couple set up with an Outback Radian. My understanding is that
Outback no longer supports AC Coupling, BTW. I would never use
that for an off grid system or for longer outages. In a very
brief explanation, it essentially bypasses any charge controlling
to the batteries, and puts full Array power into the batteries
until a relay (or phase shifting) disconnects the array. No three
stage charging, no taper charging, no float, no temp
compensation. Its like trying to fill a 5 gal bucket with a fire
house, or drive a car with a throttle that's either off or at full
throttle, no in between. The other issue is that if the batteries
get low and the inverter shuts off, the system will not recharge,
and after a couple of weeks the batteries will be sulfated beyond
recovery.<br>
</p>
<p>My guess is that manus that advocated this approach got into
trouble from end users that fried expensive battery banks during
longer outages. I would consider it the equivalent of cheap
backup generators: a great backup system for folks that don't need
it. There are probably thousands of those out there with happy
customers and installers, because its never actually been used for
more than a few hours, and the batteries are properly charged from
the grid 99.8% of the time. <br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 9/12/18 6:11 PM, Ken Schaal wrote:<br>
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<blockquote type="cite"
cite="mid:CAEd52_N0XYjkD0MMCpEHw06j2sGzzCLUuepV6X1=onHMNYLtBw@mail.gmail.com">
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<div dir="auto"><a
href="https://www.youtube.com/watch?v=eyhkIfS5Z-Q"
moz-do-not-send="true">https://www.youtube.com/watch?v=eyhkIfS5Z-Q</a></div>
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