<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt"><div>Hi Greg, we've done a lot of Gov't, Public Works stuff over the years. Be very detailed with your list of inclusions and exclusions and stay away from the "power performance guarantees" Your company should be the one to define "Prime Solar Conditions". I'd have a line item in your bid to cover the cost of all the testing and itemize your bid as much as possible so they know what they are getting in your bid and can compare it to your competition......<br><br>Max Balchowsky<br>SEE Systems<br>1048 Irvine Ave, Suite 217<br>Newport Beach, Ca. 92660<br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b>
Greg Egan <greg@remotepowerinc.com><br><b><span style="font-weight: bold;">To:</span></b> re-wrenches@lists.re-wrenches.org<br><b><span style="font-weight: bold;">Sent:</span></b> Wed, May 5, 2010 8:21:28 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] required inverter and system testing<br></font><br> <meta http-equiv="x-dns-prefetch-control" content="off"> <font face="Arial">Esteemed Wrenches,<br> <br> I'm in the process of bidding a small government job. They're requiring the following tests. I was wondering if any of you have ever run across this before and if so how you went about it. <br> <br> <i>- Inspect inverters according to requirements in NETA Acceptance Testing <br> Specifications. <br> <br> - Test the PV system under prime solar design conditions to
validate system <br> power performance rating. Use instruments calibrated within the previous six <br> months according to NIST standards. </i>(not easy since the site they've chosen will shade some of the array all the time. I should be able to just explain this to them)<br> <i><br> - Simulate malfunctions, including ground faults, to verify protective device <br> operation. </i>(I would create a GF and then replace the fuse for this test)<br> <i><br> - Test anti-islanding shutdown function due to normal utility source failure, <br> time delay and automatic restart after utility power restoration. </i>(this is an easy one)<br> <i><br> - Test and record the total harmonic distortion (THD)
content of output <br> current at 25, 50, and 100 percent of system rating. Comply with IEEE 519 <br> at MDP point of connection. <br> <br> - Test and record the real power output for each inverter, and total power <br> delivered at the grid tie connection, for a 24 hour period. The continuous <br> power output during prime solar conditions shall meet or exceed <br> performance requirement under part I of this specification. <br> <br> - For each inverter, record DC input voltage for 24 hours, to demonstrate <br> affects of maximum power point tracking (MPPT), voltage regulation within <br> inverter rated limits, and affect of partial shading
on solar modules. <br> Simulate partial shading by covering 50% of modules during prime solar <br> conditions. <br> <br> - Record of Tests and Inspections: Prepare and submit documentation of tests and <br> inspections, including references to manufacturers' written instructions and other test <br> and inspection criteria. Include results of tests, inspections, and retests. <br> <br> </i><br> Any advice would be gratefully accepted and appreciated!<br> <br> Best,<br> <br> Greg Egan<br> <br> NABCEP Certified PV Installer<br> Remote Power Inc.<br> Fairbanks, AK</font> <pre class="moz-signature">-- <br>Greg Egan<br><br>Remote Power Inc.<br>981 Gold Mine Trail<br>Fairbanks, AK 99712<br>P. 907.457.4299<br><br>U.S.Distributor for Outback Power
Systems and other premium power equipment.</pre> <meta http-equiv="x-dns-prefetch-control" content="on"></div></div> </div></body></html>