<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><FONT size="2">Alan, According to the specs an my batteries is shows a low voltage of 5 volts . But better battery life if discharged less than 50 % </FONT><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2"><A href="https://resources.fullriverbattery.com/fullriver-battery/external-media/spec-sheets/DC220-6.pdf">https://resources.fullriverbattery.com/fullriver-battery/external-media/spec-sheets/DC220-6.pdf</A> </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">Brian</FONT></DIV><DIV><FONT size="2"><BR></FONT></DIV><DIV><FONT size="2"><BR></FONT><BR><SPAN style="font-size: 10pt;">--- personal_submersibles@psubs.org wrote:</SPAN><BR><BR><SPAN style="font-size: 10pt;">From: Alan via Personal_Submersibles <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></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 21:29:48 +1300</SPAN><BR><BR><DIV style="font-size: 10pt;"></DIV><DIV style="font-size: 10pt;">Brian,</DIV><DIV style="font-size: 10pt;">It is recommended not to take lead acid batteries below 50% charge, or 12.2V.</DIV><DIV style="font-size: 10pt;">So 48.8V.</DIV><DIV style="font-size: 10pt;">However when you have a heavy load on them they indicate a lower voltage than</DIV><DIV style="font-size: 10pt;">what they will be if you stop the motor & let them recover.</DIV><DIV style="font-size: 10pt;">Alan</DIV><DIV style="font-size: 10pt;"><BR></DIV><DIV style="font-size: 10pt;"><BR></DIV><DIV style="font-size: 10pt;"> </DIV><DIV style="font-size: 10pt;"><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 style="font-size: 10pt;"><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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