[RE-wrenches] Adding battery backup to Enphase

[Drake]

Hello Dan,

We are preparing to install a similar system. 
Enphase now allows AC coupling. We have specified 
the Radian. The batteries will be Concorde AGM, 
either 305 or 405 AH. Concorde AGMs are useful 
because they can take a very fast charge rate. 
With over 6 kW available to charge batteries, the 
charge rate would exceed C/5 for an L-16 battery, 
which the Concorde L-16 (405 AH) can easily 
handle with one string. The Concorde 305 AH can 
handle it also. The Radian 8048 can AC couple 6kW.

The Radian GSLC175-AC-120/240 load center is set up for AC coupling.

Drake

Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
<http://athens-electric.com/>http://athens-electric.com/

At 06:32 PM 10/25/2015, you wrote:
>Esteemed wrenches;
>I have a new client who has convinced himself 
>the world as we know it will be ending in the 
>next few months. He has ~6kW of Enphase and 
>wants to add battery backup for critical 
>loads.....quite a few of them. I recommended he 
>buy some Kill-a-Watt units and start to monitor kWh usage.Â
>My first thought was the new Enphase "AC Battery 
>system." Is this even available for purchase 
>yet, and if so has anyone here tried it? I'm 
>thinking ease if compatibility, tech support, warranty......
>Otherwise will likely AC couple a new 
>inverter.  I was thinking an Outback Radian, 
>and lithium batteries (looking at Iron Edison) 
>as my prediction is they will be mostly sitting 
>idle for the next 10 years at least. Any 
>pitfalls, horror stories, and no-nos anyone is 
>willing to share? Crossed off NiFe; my house 
>runs on them and they are fairly 
>high-maintenance, as I predict this client will be.
>
>Dan Fink
>Adjunct Professor, Ecotech Institute
>IREC Certified Instructor™ for:Â
>~ PV Installation Professional
>~ Small Wind Installer
>Executive Director, Buckville Energy
>NABCEP / IREC / ISPQ Accredited Continuing Education Providers™
><tel:970.672.4342>970.672.4342
>
>Â
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