Hello Buddy, I am using one group 31 135 ah 12 volt deep cycle battery made by Trojan which I install in 2002 which was replace in 2013 with a Interstate deep cycle battery. A 12vdc to 120 vac 60 hz 5 kw inverter is use to run my heaters, cooling pumps for the motor controller and fans.
Remember that when you draw 5 amps from the inverter, this is 50 amps from the battery. (50a x 12v = 600watts or 600 watts /120vac = 5 amps at a 600 watt heater. I am using a Shumaker Smart Charger, that will charge Standard 12 volt, Deep cycle 12 volt, AGM and GEL. It charges the accessory battery using the main AC EV input which is circuit breaker down to 20 amp for this charger. It also goes into a maintainer cycle and a power supply which powers a BMS unit. I am also using a DC to DC converter (210 vdc to 13.5Vdc rated at 180 amps maximum) that also runs the inverter while the EV is running. I am using a micro switch on the accelerator control unit that turns on a contactor to power the inverter only when the EV is coasting down hill or to a stop. The output of the accessory battery is fuse with a Busman Semi Conductor fuse rated at 200 amps. The maximum ampere of all the accessories I have on at the same time was about 100 amps at 12 vdc which is what we call 2.00 service factor. It is best to not to go over 80% of the rating of any power source. Roland ----- Original Message ----- From: Buddy Mills via EV<mailto:[email protected]> To: 'Electric Vehicle Discussion List'<mailto:[email protected]> Sent: Thursday, August 21, 2014 11:17 PM Subject: [EVDL] Replacing Auxiliary Battery I am replacing my auxiliary battery(ies)for my 12 volt system. Presently I have two group 31 Deka 8G31 (70lbs each) over the front bumper. They were left over from my old lead days before I converted to Lithium and fit the spot at the time. My question is "What plays better with the DC to DC converter. Gel? AGM? or just an old fashion lead auto battery? I need something with some ump so that I can run my 12vdc to 120vac converter (it runs my heaters). So just a small 12v will not cut it. I also like to trickle charge it with a small charger while plugged in and charging the Traction Pack. Any suggestions. Thanks, Buddy Mills [email protected]<mailto:[email protected]> Look mom, no gas. http://www.evalbum.com/2887<http://www.evalbum.com/2887> Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA>) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140822/765f9eb4/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
