<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div><span></span></div><div></div><div id="yui_3_16_0_1_1431992484475_3406" dir="ltr">Hank, the only thing that I would be worried about is that car alternators are designed to recharge conventional lead acid car batteries. Deep cycle AGM's are a different beast. AGM are more susceptible to being damaged by overcharging. Also most sophisticated battery chargers go through three distinct phases depending on the initial SOC. With a car alternator, you are not going to get this this unless you go through a PLC and program in the charging curves.</div><div id="yui_3_16_0_1_1431992484475_3425" dir="ltr"><br></div><div id="yui_3_16_0_1_1431992484475_3426" dir="ltr"><br></div><div id="yui_3_16_0_1_1431992484475_3427" dir="ltr">I have had good luck over the last 8 years with on onboard battery charger for AGMs that is used for electric car/truck conversions. When my boat's main propulsion bank was 120 VDC I used a Zivan NG3 120-18 and now that I have switched to 36 VDC bank, I use a Zivan NG3 <a id="yui_3_16_0_1_1431992484475_3480" href="http://www.zivanusa.com/pdf/NG3.pdf">http://www.zivanusa.com/pdf/NG3.pdf</a>. I have had hundreds of recharges using these rechargers with no problems. You can get a panel mounted remote display that shows were you are on the recharge. The suppliers adjust these to match type and capacity of your AGM batteries. They are a bit pricey but often come up eBay. I really like being able to plug my boat into an AC receptacle and come back the next day with them fully charged having gone through a charging curve that is tuned to my AGM batteries. For winter storage, you can leave the boat plugged in indefinitely and the system supplies a float charge again tuned to your AGM batteries. The only negative on this system is that a battery bank is typical made of individual batteries wired in parallel and series. This system does not have a Battery Management System (BMS) like you would have on a <strong id="yui_3_16_0_1_1431992484475_3743"><font id="yui_3_16_0_1_1431992484475_3742" color="#6a6a6a">lithium</font></strong>-<em><strong><font color="#6a6a6a">ion battery</font></strong></em> that controls charge on individual batteries, just he overall bank. I have had to replace individual batteries that degraded over time. </div><div id="yui_3_16_0_1_1431992484475_3405" dir="ltr"><br></div><div id="yui_3_16_0_1_1431992484475_3407" dir="ltr">Cliff <br><br></div><div id="yui_3_16_0_1_1431992484475_3182"><div id="yui_3_16_0_1_1431992484475_3181"><br></div></div><br> <div id="yui_3_16_0_1_1431992484475_3243" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div id="yui_3_16_0_1_1431992484475_3242" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_1_1431992484475_3241" dir="ltr"> <hr size="1" id="yui_3_16_0_1_1431992484475_3244"> <font id="yui_3_16_0_1_1431992484475_3415" face="Arial" size="2"> <b id="yui_3_16_0_1_1431992484475_3734"><span id="yui_3_16_0_1_1431992484475_3733" style="font-weight: bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b id="yui_3_16_0_1_1431992484475_3732"><span id="yui_3_16_0_1_1431992484475_3731" style="font-weight: bold;">Sent:</span></b> Monday, May 18, 2015 6:11 PM<br> <b id="yui_3_16_0_1_1431992484475_3730"><span id="yui_3_16_0_1_1431992484475_3729" style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] agm charger<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1431992484475_3255"><br><br clear="none">Scott,<br clear="none">I have been using the same thing and they don't last, we pay 85 dollars here.<br clear="none">I added a couple pictures that show the ballast tanks nicely, I am sure happy with it.<br clear="none">Hank --------------------------------------------<br clear="none">On Mon, 5/18/15, <a id="yui_3_16_0_1_1431992484475_3428" href="mailto:swaters@waters-ks.com" shape="rect" ymailto="mailto:swaters@waters-ks.com">swaters@waters-ks.com</a> via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"> Subject: Re: [PSUBS-MAILIST] agm charger<br clear="none"> To: "Personal Submersibles General Discussion" <<a id="yui_3_16_0_1_1431992484475_3601" href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Received: Monday, May 18, 2015, 7:05 PM<br clear="none"> <br clear="none"> Hank,I<br clear="none"> charge my AGM's with a computerized battery charger.<br clear="none"> They cost about $65.00 at True Value Hardware. They charge<br clear="none"> at the correct rate and shut off when the charging is<br clear="none"> complete.Thanks,Scott<br clear="none"> Waters<br clear="none"> <br clear="none"> Sent<br clear="none"> from my U.S. Cellular® Smartphone<br clear="none"> <br clear="none"> -------- Original message --------<br clear="none"> From: hank pronk via Personal_Submersibles<br clear="none"> <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> Date:05/18/2015 5:58 PM (GMT-06:00) <br clear="none"> To: <a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br clear="none"> Cc: <br clear="none"> Subject: [PSUBS-MAILIST] agm charger <br clear="none"> <br clear="none"> Hi all,<br clear="none"> I am tired of buying battery chargers for Gamma. I<br clear="none"> think I am over using them and they go haywire. I read<br clear="none"> that I can charge my AGM's with an automotive<br clear="none"> alternator. I am thinking of building a battery<br clear="none"> charger with an alternator driven with a 1hp AC 220 V<br clear="none"> motor. The alternator has an internal regulator, so it<br clear="none"> will stop charging when the battery is full. <br clear="none"> Is there anything wrong with this idea?<br clear="none"> Hank<br clear="none"> _______________________________________________<br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<div class="qtdSeparateBR"><br><br></div><div class="yqt0387578401" id="yqtfd54075"><br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></div><br><br></div> </div> </div> </div></body></html>