<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">HI Chris,<div><br></div><div>It highly unlikely it’s 230v 50 hz exactly as it’s going to be related to head and flow and the type of turbine. </div><div>It also is very likely a 3 phase motor. </div><div>Depending on the exact motor and turbine etc, the VOC vs working range can be 2X+</div><div>Hz also changes with rpm which is directly related to flow, height and load.</div><div>With Iota’s you generally have to have a dump load to keep the hydro working, as again depends on the type of hydro and motor you don’t want to let it go VOC as the RPM just goes through the roof which would happen if the battery is full and the iota is at its charge set point. </div><div><br></div><div>You are going to need more info to be able to figure out which is the best way to convert it. </div><div>With more info I can help you get the right parts. </div><div><br></div><div>Ive done a number of hydros in Ecuador. </div><div><br></div><div>jay</div><div><br></div><div><br></div><div><div><br><blockquote type="cite"><div>On Apr 23, 2025, at 1:55 PM, Chris Daum via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div><div><div><div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Hey folks:<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;"><o:p> </o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">I’m trying to assist a friend with a defunct hydro system in Ecuador; actually, the hydro system is the only thing working.<span> <span class="Apple-converted-space"> </span></span>It’s (I assume unrectified) output is 230VAC 50<span class="Apple-converted-space"> </span><span class="SpellE">htz</span><span class="Apple-converted-space"> </span>and about ~500W,<span class="Apple-converted-space"> </span><span> </span>and they want to step it down for charging a 12V battery bank.<span> <span class="Apple-converted-space"> </span></span>I’ve tried to get them to look at other voltages but a lot of their loads are 12V, and this IS a very primitive system.<span> <span class="Apple-converted-space"> </span></span>It’s in a rainforest so there is no solar resource to speak of.<span> <span class="Apple-converted-space"> </span></span>They will be running some 120VAC 60<span class="Apple-converted-space"> </span><span class="SpellE">htz</span><span class="Apple-converted-space"> </span>loads (like computers and phone chargers) but they already have a bunch of DC led lights in place.<span> <span class="Apple-converted-space"> </span></span>It gets dark there at 6 pm every night and the forest is so dense, solar is not an option.<span> <span class="Apple-converted-space"> </span></span><o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;"><o:p> </o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Do you know of anyone that offers or can manufacture such a converter?<span> <span class="Apple-converted-space"> </span></span>This is for a school and clinic that gets displaced from weather, equipment failures and mercenaries.<span> <span class="Apple-converted-space"> </span></span><span> </span><o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;"><o:p> </o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Feel free to contact me off list.<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;"><o:p> </o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Best,<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;"><o:p> </o:p></span></font></div><div style="margin: 0in; font-size: 11pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Chris Daum<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 11pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">Oasis Montana Inc.<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 11pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">406-777-4309 or 4321<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 11pt; font-family: Aptos, sans-serif;"><font size="2" face="Aptos"><span style="font-size: 11pt;">406-777-4309 fax<o:p></o:p></span></font></div><div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><font size="3" face="Aptos"><span style="font-size: 12pt;"><a href="http://www.oasismontana.com/" style="color: purple; text-decoration: underline;">www.oasismontana.com</a></span></font><font size="2"><span style="font-size: 11pt;"><o:p></o:p></span></font></div></div></div></div></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; 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