<div dir="ltr"><div><div>Mac<br></div>Outback makes a AC couple ready radian wired box its nice because it already has the relay to kill the PV system along with the programming to make it work<br></div>Jerry<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 10, 2014 at 6:04 AM, jay peltz <span dir="ltr"><<a href="mailto:jay@asis.com" target="_blank">jay@asis.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hi Mac,<div><br></div><div>It looks like they are doing all that work on the AC side.</div><div>If you do the DC side, you'll lose the comm from the optimizers causing error messages etc.</div><div><br></div><div>For the few times a year this will actually need to regulate, depending on the battery inverter I'd install a AC relay and kill the whole array.</div><div>Simple, easy reliable.</div><div>And in the end you'd need to do this anyway even if you did some string disco's as you mention is a modest ( small) battery which means its easy to over cook it, and I"m guessing its VRLA.</div><div><br></div><div>jay</div><div>peltz power</div><div><br></div><div><br></div><div><div><div><div class="h5"><div>On Dec 10, 2014, at 6:12 AM, Mac Lewis wrote:</div><br></div></div><blockquote type="cite"><div><div class="h5"><div dir="ltr">Hello wrenches,<div><br></div><div>I have a request to design a modest battery backup system for a residence that has a 10 kW grid-tied Solar Edge system using a single SolarEdge Inverter SE10000A- US. I'd like to try to utilize the solar potential that we have on site. One idea that I had was to use DC relay(s) to cut out a couple strings when the grid was out, dropping the PV input down to about 3kW. Has anyone ever tried this?</div><div><br></div><div>I could easily get away with a ~4 kW battery-based inverter and would like to avoid stacking unnecessarily. </div><div><br></div><div>Solar Edge also offers power output control through radio ripple control. I took a look at this paper on it <a href="http://www.solaredge.com/files/pdfs/power-reduction-control-application-note.pdf" target="_blank">http://www.solaredge.com/files/pdfs/power-reduction-control-application-note.pdf</a>. Off-the shelf it looks like I would need a computer to control the power output dynamically. Perhaps I could activate the 5V K2 relay with a simple control scheme and drop the power to 30%, but I hesitate to dive in too deep. Anyone worked with radio ripple control?</div><div><br></div><div>Thanks<br clear="all"><div><br></div>-- <br><div><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:'Times New Roman';font-size:medium;color:rgb(255,153,0)"><b><font size="3" face="Arial, Helvetica, sans-serif"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>
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