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<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Wrenches:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>We were called to assess the status of an off-grid system
that is not the worst I have seen, but it comes close.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>I have some preliminary thoughts about system redesign,
but would like to hear from the Wrenches about the array.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Givens:<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>We will not install anything unless it is to code.
It is obvious that none of the existing system was installed to code.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>We will use the existing 24V battery bank consisting of
8, Trojan L16s. The batteries are still “relatively fresh.”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Pump is a Franklin pump ½ hp 115VAC. The CFs dim
when the pump starts.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>New load will be a GRINDER PUMP FOR SEPTIC = 2HP, 15amp
(240 or 120VAC – more than likely it will be 240V pump) – Another
light dimmer!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Modest daily electrical load (estimate no more than 600
WHr/day; 25AHr) – they are <i><u>very good</u></i> at managing their
electrical use.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Solar array – to keep or replace?<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>8 solar modules – a Heinz 57 mix of older modules -
2 Photowatt PMX500 (Are these modules UL listed? There did not appear to
be a rating label on the back.) wired in series, 2 Kyocera KC120-1 wired in
series, 2 Golden Genesis PV-75 wired in series, 2 Photowatt PW 1000 12V-24V
internally wired for 24V wired in parallel with the other modules strings
– all of these modules are wired in 5 parallel strings for approximately
34.2Vmp and 20.4Imp, ~695W (STC). Oh, and they need a new mounting
structures for the modules.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Should I try to work with these modules or advise the
customer to start over (any modules that are not UL listed will have to go)?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>What is a good “rule of thumb” for a ratio of
PV watts to battery bank capacity per day of autonomy?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'>Thanks for your ideas.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-family:Papyrus;color:#E36C0A'>Bob Clark<o:p></o:p></span></b></p>
<p class=MsoNormal><b><i><span style='font-family:Papyrus;color:#E36C0A'>SolarWind
Energy Systems, LLC<o:p></o:p></span></i></b></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";
letter-spacing:-.3pt'><o:p> </o:p></span></p>
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