That is correct, none of the HV wiring outside the battery pack will energize, before those internal HV contactors pre-charing, closing and energizing the HV bus first before any HV module can draw or add energy from the pack.
The magic process starts typically when you plug your J1772 EVSE on a 120Vac outlet. (L1) there is only a small number of modules on the Volt-EV that wakes up after Pilot signal handshaking with the EVSE, and all this happens on the 12V side first. After a few validations, one of those awaken modules have the ability to wake up the BMS inside the battery pack and also provide 12V power, so the BMS can close the HV contactors (generally 2 for charging), and those may be ones requiring most power than everything else during that L1 session. To put in some numbers: maybe 3 CAN modules awaken drawing 1A each, plus those 2 HV contactors, maybe 1A each = 5Amps total, that would represent 70watts approx. This without considering if the DCDC also wakes up and your 12V battery is low and requires charging. Although this would be temporarily and as soon your 12V batt enters floatation mode, that power will be insignificant. So, in the case you would be able to do all that magic, to avoid opening the pack and bypass that HV circuitry; then you may want to have a trigger point from your PV that can ensure you will not produce less power than that 'static' required to keep those 12V modules. And still you would be at risk if the vehicle 12V batt is too low, rather than charging the HV pack, you will discharge it for maybe 20-40mins. But the good thing on this is that your 12V batt will be full now and that is the most important thing to start with. (no 12V batt, no HV even-though HV batt full). But not a grid-tie inverter, that will not work if it doesn't see a 120V since wave, you just need a 12Vdc -> 120Vac 1.5Kw continuous power inverter, powered by an additional 12V battery that is charged from your PV. That may be the most practical way, not best efficient, but easy to do method if I'm not missing something else. On Mon, May 18, 2020 at 8:39 AM Robert Bruninga via EV <ev@lists.evdl.org> wrote: > I assume those conductors are not alive until the main contactor inside > the battery box is activated. And once those are activated through some > kind of volt software magic, the static load of powering up the system > will draw more power than the 240 watts the solar panels can produce. > > Bob > > > -----Original Message----- > From: EV <ev-boun...@lists.evdl.org> On Behalf Of Peter VanDerWal via EV > Subject: Re: [EVDL] FrankenVolt coming along... > > > Oh, and I still welcome anyone with info on where I can easily access > > the 300V battery terminals for charging. > > > Maybe use vampire splice connectors on the high voltage cables to the > Accessory "Power Control Module" in the trunk? > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/index.html > INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at 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/20200518/3f40590d/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
