<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Brian,</div><div>It is recommended not to take lead acid batteries below 50% charge, or 12.2V.</div><div>So 48.8V.</div><div>However when you have a heavy load on them they indicate a lower voltage than</div><div>what they will be if you stop the motor & let them recover.</div><div>Alan</div><div><br></div><div><br></div><div> </div><div><br>On 8/03/2020, at 7:04 PM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family:Arial, sans-serif; font-size:10pt;"><font size="2">David, yes I'm running off my batteries, they are AGM, I have eight 240 ah batteries. I'm not sure how low I can go with the voltage, I believe the storage indicator has a low limit where it would read zero, but I'm pretty sure the motors will run on 36 volts, there is most likely a recommended low voltage for the 12 volt batteries. I ran them for 6 hours and the storage indicator was telling me 40% full. Voltage was 44.3 </font><div><font size="2"><br></font></div><div><font size="2">Rick, this is the battery charger I have: <a href="https://www.batterypete.com/chargers/golf-carts/delta-q-quiq-48-volt-18-amp-912-4800/?gclid=Cj0KCQiAqY3zBRDQARIsAJeCVxP7pOTpKjANY_Z4leDJMXsag_kgsFsDIKImLms-Qd7CIh43hEoq7_oaAruDEALw_wcB">https://www.batterypete.com/chargers/golf-carts/delta-q-quiq-48-volt-18-amp-912-4800/?gclid=Cj0KCQiAqY3zBRDQARIsAJeCVxP7pOTpKjANY_Z4leDJMXsag_kgsFsDIKImLms-Qd7CIh43hEoq7_oaAruDEALw_wcB</a><br></font><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font></div><div><font size="2"><br></font></div><div><font size="2"> </font><br><br><span style="font-size: 10pt;">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size: 10pt;">From: David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size: 10pt;">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size: 10pt;">Subject: Re: [PSUBS-MAILIST] (no subject)</span><br><span style="font-size: 10pt;">Date: Sat, 7 Mar 2020 21:02:11 -0800</span><br><br><div dir="auto" style="font-size: 10pt;">Brian, are you running them from your actual batteries? Are they deep cycle lead AGM, or LIPO4? What's the cut off voltage?<div dir="auto">David</div></div><br><div style="font-size: 10pt;"><div dir="ltr">On Sat, Mar 7, 2020, 7:58 PM Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2">It's been 4 hours now and my voltage is at 46.44 volts</font><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font><br><span style="font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size:10pt">From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">Subject: Re: [PSUBS-MAILIST] (no subject)</span><br><span style="font-size:10pt">Date: Sun, 8 Mar 2020 15:48:43 +1300</span><br><br><div style="font-size:10pt"><span></span></div><div style="font-size:10pt"><div></div><div>Hi Brian,</div><div>3hp is 2,200W, so 500W with no load seems excessively high.</div><div>Just measured mine & it's .9Amps (900mAh) for a 1500W compensated motor running in a 5cst silicone oil. Running off 48V also. So under 49W.</div><div>I think you have a large prop on your motors. I just saw your gearing ratio, but the</div><div>loss shouldn't be that much.</div><div>I would test them individually in case one is at fault.</div><div>Cheers Alan</div><div><br>On 8/03/2020, at 2:54 PM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote><div><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2"><font face="Arial, sans-serif">Alan, They are 3 hp golf cart motors, true there is no load but If I kept the same amp draw while actually at sea then it seems it would be equivalent. Under actual conditions it would probably be going very slowly while drawing 21 amps ( 10.5 amps per motor ) . </font></font><div><font face="Arial, sans-serif" size="2"><br></font></div><div><font face="Arial, sans-serif" size="2">Brian</font></div><div><font face="Arial, sans-serif" size="2"><br></font></div><div><font face="Arial, sans-serif" size="2"><br></font><br><span style="font-family:Arial,sans-serif;font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-family:Arial,sans-serif;font-size:10pt">From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-family:Arial,sans-serif;font-size:10pt">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-family:Arial,sans-serif;font-size:10pt">Subject: Re: [PSUBS-MAILIST] (no subject)</span><br><span style="font-family:Arial,sans-serif;font-size:10pt">Date: Sun, 8 Mar 2020 14:21:54 +1300</span><br><br><div style="font-family:Arial,sans-serif;font-size:10pt"></div><div style="font-family:Arial,sans-serif;font-size:10pt">Brian,</div><div style="font-family:Arial,sans-serif;font-size:10pt">I take it that there is no load on the motor!</div><div style="font-family:Arial,sans-serif;font-size:10pt">That seems a high power consumption, 500 Watts per motor.</div><div style="font-family:Arial,sans-serif;font-size:10pt">Have you got the specs for those motors? Have you checked them individually?</div><div style="font-family:Arial,sans-serif;font-size:10pt">Alan</div><div style="font-family:Arial,sans-serif;font-size:10pt"><br>On 8/03/2020, at 1:26 PM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote style="font-family:Arial,sans-serif;font-size:10pt"><div><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2"><font face="Arial, sans-serif">There are some times when 110 vac could be needed, like computer stuff. Just a thought, we can have an open mind on the subject ! </font></font><div><font size="2"><font face="Arial, sans-serif"><br></font></font></div><div><font size="2"><font face="Arial, sans-serif"><br></font></font></div><div><font size="2"><font face="Arial, sans-serif"> Right now I'm running my motors to see how long they'll go. It's a kind of cool rainy day so the temperature is close to what the ocean would be . I've got the oil expansion tube going into a bucket so I can get an idea how large of a reservoir I will need to take care of the expansion. I think I'm going to opt for just a reservoir on the motor side and then I'm running a hose up high and then back down to take care of the compression up the tube for when I submerge. Since most of the compression of air will occur in the first 30' the water should never get high enough ( in the tube) to go over the hump and get</font></font><span style="font-family:Arial,sans-serif;font-size:small"> into the motor compartment. So the whole system will be open . I'm also monitoring Voltage , Amp draw, and , Watts </span><span style="font-family:Arial,sans-serif;font-size:small"> 48 volts 21 amps 1030 watts - two motors running .</span></div><div><font size="2"><font face="Arial, sans-serif"><br></font></font></div><div><font size="2"><font face="Arial, sans-serif"> </font></font></div><div><font face="Arial, sans-serif" size="2"><br></font></div><div><font face="Arial, sans-serif" size="2">Brian</font></div><div><font face="Arial, sans-serif" size="2"> </font></div><div><font face="Arial, sans-serif" size="2"><br></font><br><span style="font-family:Arial,sans-serif;font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-family:Arial,sans-serif;font-size:10pt">From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-family:Arial,sans-serif;font-size:10pt">To: Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-family:Arial,sans-serif;font-size:10pt">Subject: Re: [PSUBS-MAILIST] (no subject)</span><br><span style="font-family:Arial,sans-serif;font-size:10pt">Date: Sun, 8 Mar 2020 00:06:47 +0000 (UTC)</span><br><br><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr">Why complicate a simple solution? this works great! Bad Brian!</div><div dir="ltr"><br></div><div dir="ltr">Hank</div><div><br></div>
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On Saturday, March 7, 2020, 4:59:49 PM MST, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div><div><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2">There are a lot of 110AC led's out there , it would be a simple matter to run a DC inverter to make 110ac voltage , I wonder if there would be any advantage to that, there might be some better quality led's that are made for AC voltage, Any thoughts on that?</font><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font><br><span style="font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size:10pt">From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">Subject: [PSUBS-MAILIST] (no subject)</span><br><span style="font-size:10pt">Date: Sat, 7 Mar 2020 16:30:26 +0000 (UTC)</span><br><br><div><div style="font-size:13px"><div dir="ltr"><span><a href="https://www.youtube.com/watch?v=dHDUilUO6P8"> 15:13
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