[RE-wrenches] Golf Cart as temporary off-grid PV

[Ray]

For disconnects, I'd just use Andersen quick connects.  That's what they 
use on forklifts and other industrial battery operated machines.  Also, 
the Magnum would act as the vehicle charger, and would be a much better 
charger than the stock golf cart models.

Ray Walters
Remote Solar
303 505-8760

On 3/15/22 4:46 PM, Jason Szumlanski wrote:
> That's what I was thinking- a MS4448 would be a nice option with a 
> good surge rating.
>
> I'm trying to make this work with little to minimal equipment onboard 
> the golf cart. Ideally, the battery would connect to a 
> stationary inverter/charger at the house via a cable/connector. The PV 
> would be permanently mounted also and would be grid-tied for times the 
> battery is not connected. I am thinking this needs to be an AC coupled 
> scenario with a grid-tie inverter that is AC coupled to the battery 
> inverter. I'm hung up on how to safely connect the battery to the 
> inverter (and more importantly, disconnect the battery from the inverter).
>
>
> Jason
>
> *
>
> *
>
>
> On Tue, Mar 15, 2022 at 6:29 PM Ray Walters <ray at solarray.com> wrote:
>
>     Most carts run at 48vdc these days.  They either have eight 6 volt
>     batteries, or six 8 v batteries.  I would think that would make a
>     good
>     match for power backup with a 4kw range inverter like the Magnum
>     MS4448.
>
>     Ray
>
>     On 3/15/2022 12:18 PM, Nick A Lucchese wrote:
>     > Not sure what the golf cart fleets are these days but decades
>     ago as a youngster I worked at a course where all the EZ-GO’s were
>     36v nominal with all Trojan T-105’s. Also uncertain if still
>     available or not but years ago the first Cybo inverters I
>     purchased were also intended for 36v nominal battery banks.
>     Perhaps George and the team still offer that model. It’s obviously
>     a different type of architecture and I didn’t have any luck with
>     the 4 amp 36v charger on the inverter’s AC output that was
>     promoted but surely you could figure your means of charging with
>     perhaps a Flexmax or similar. I had some issues with the hot water
>     heater model but the off grid model consistently performed it’s
>     inverting function assuming there was a fan or some sort of
>     resistive or inductive load to keep the inverter awake. The only
>     other 36v inverter I can think of was the Heart Transverter which
>     was a big loss for a few of us.
>     >
>     > https://www.cyboenergy.com/products/offgridoverview.html
>     >
>     > Best of luck Jason, Nick
>     >
>     >
>     >
>     >
>     >> On Mar 14, 2022, at 3:48 PM, Jason Szumlanski
>     <jason at floridasolardesigngroup.com> wrote:
>     >>
>     >> Every now and then I get questions here in the land of
>     hurricanes and golf courses about using golf carts as the battery
>     bank for a permanently mounted grid-tie home PV system in a backup
>     scenario. Does anyone have any ideas on a good way to do something
>     like this? The battery would need to be able to be unplugged of
>     course (not under load I hope!) It's mostly DIY'ers trying to
>     cobble together a solution for a small critical load panel for
>     their home.
>     >>
>     >> The idea is becoming more popular as people hear about using
>     EVs for home backup. I'd like to get ahead of it and maybe even
>     offer a solution that's safe, legal, and functional.
>     >>
>     >> Jason Szumlanski
>     >> Florida Solar Design Group
>     >> _______________________________________________
>     >> List sponsored by Redwood Alliance
>     >>
>     >> Pay optional member dues here: http://re-wrenches.org
>     >>
>     >> List Address: RE-wrenches at lists.re-wrenches.org
>     >>
>     >> Change listserver email address & settings:
>     >>
>     http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>     >>
>     >> There are two list archives for searching. When one doesn't
>     work, try the other:
>     >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>     >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>     >>
>     >> List rules & etiquette:
>     >> http://www.re-wrenches.org/etiquette.htm
>     >>
>     >> Check out or update participant bios:
>     >> http://www.members.re-wrenches.org
>     >>
>     > _______________________________________________
>     > List sponsored by Redwood Alliance
>     >
>     > Pay optional member dues here: http://re-wrenches.org
>     >
>     > List Address: RE-wrenches at lists.re-wrenches.org
>     >
>     > Change listserver email address & settings:
>     > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>     >
>     > There are two list archives for searching. When one doesn't
>     work, try the other:
>     > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>     > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>     >
>     > List rules & etiquette:
>     > http://www.re-wrenches.org/etiquette.htm
>     >
>     > Check out or update participant bios:
>     > http://www.members.re-wrenches.org
>     >
>     _______________________________________________
>     List sponsored by Redwood Alliance
>
>     Pay optional member dues here: http://re-wrenches.org
>
>     List Address: RE-wrenches at lists.re-wrenches.org
>
>     Change listserver email address & settings:
>     http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
>     There are two list archives for searching. When one doesn't work,
>     try the other:
>     https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>     http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
>     List rules & etiquette:
>     http://www.re-wrenches.org/etiquette.htm
>
>     Check out or update participant bios:
>     http://www.members.re-wrenches.org
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here:http://re-wrenches.org
>
> List Address:RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20220316/6758c15b/attachment.htm>