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</style><body>William,<br>That big of a load will look like a dead short to the hydro. If you want to use the diverted energy, you need a load that draws just enough to pull the voltage down below charging voltage. You only have 50 watt to control. Get a 12 ohm 100 watt resistor or a 4000 watt 240 volt water heating element. That would draw 60 watts at 30 volts.<br>I would probably forget diversion and run it through an old C-40 charge control. Have you measured the voltage from the hydro without a load? If it is under 70 volts you could use a PV controller like the C40<br>How big is the battery? You might not need control at all if it is a few hundred amp hours of flooded battery.<br>David Katz.<br><br>Sent from my HTC smartphone on the Now Network from Sprint!<br><br><br><div id="htc_header" style="">----- Reply message -----<br>From: "William Miller" <william@millersolar.com><br>To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org><br>Subject: [RE-wrenches] Hydro Diversion Controls<br>Date: Thu, Nov 22, 2012 12:18 pm<br><br></div><br><br></body>
<font size="2"><div class="PlainText">David:<br>
<br>
Interesting idea. The added benefit is if the relay gets stuck, it won't <br>
destroy the battery bank.<br>
<br>
The diversion load must equal or exceed the output of the hydro, <br>
correct? The load we have will draw 38 amps at 24 vdc, the hydro will put <br>
out 2 amps. Sounds like I have enough headroom<br>
<br>
Thanks again to all of you.<br>
<br>
William<br>
<br>
At 08:32 PM 11/21/2012, David Katz wrote:<br>
<br>
>William,<br>
>I always connect the hydro side of the diode to the diversion load with <br>
>the contactor, so I don't pull the battery down while regulating. The <br>
>diversion load must draw enough current to pull the hydro voltage below <br>
>the absorb voltage. Use ohms law to calculate the resistance.<br>
>David Katz<br>
<br>
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