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 > BEV as a toad behind diesel pusher

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Durb

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Posted: 12/21/21 09:54am Link  |  Quote  |  Print  |  Notify Moderator

As the BEV/RV capability debate rages on, I have couple of questions regarding the viability of an electric car being used as a towed vehicle.

First, are some even rated as being capable of being towed four down?

Second, if towed behind a DP could it be set up so regenerative braking allowed the car to be charged completely when arriving at a destination? Would the electronics allow that? Would the process create too much drag on the tow vehicle?

Third, can some BEVs be charged by plugging into a 50 amp pedestal without heavy supplemental equipment like transformers and DC convertors?

Possibly, some manufacturer can carve out a nice niche by addressing these issues.

jdc1

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Posted: 12/21/21 10:26am Link  |  Quote  |  Print  |  Notify Moderator

A park would really frown on charging an EV. LOL. Maybe they could add a surcharge? No EV's are towable 4 down. The electric motors do not have a true neutral.

valhalla360

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Posted: 12/21/21 10:51am Link  |  Quote  |  Print  |  Notify Moderator

Charging via towing would likely cost far more than paying for grid power. The MH would burn significant extra fuel to drag a car that is resisting being pulled. As far as I know, no EV has this capability and I wouldn't expect it in the future. It's way too small of a market.

Technologically, you can certainly plug into the pedestal. Depending on which outlet and the charger on the car, it will vary how fast it charges. If you offer the owner to pay extra for the electricity and unplug if the park grid is maxing out (hot summer weekend when breakers start popping), I wouldn't see any complaints from the owner. Try to sneak it and justifiably, you might wind up with an angry owner.


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time2roll

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Posted: 12/21/21 11:09am Link  |  Quote  |  Print  |  Notify Moderator

The only two I have read that can be towed four-down are Rivian and Bollinger. Need to verify restrictions with the manufacturer before you place an order.

While technically any EV can be temporarily towed, it is not recommended and some may eventually turn off and set the brakes if left to idle too long with no driver. Charging while towing would be a fools errand anyway.

50 amp RV outlet (NEMA 14-50) is the most common connection to install Level 2 charging. Yes you will need a standard EVSE cord to plug the vehicle in but nothing extra. ALL EVs can easily be charged from a 50 amp RV power outlet.

* This post was edited 12/21/21 02:46pm by time2roll *


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Dutch_12078

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Posted: 12/21/21 11:42am Link  |  Quote  |  Print  |  Notify Moderator

jdc1 wrote:

A park would really frown on charging an EV. LOL. Maybe they could add a surcharge? No EV's are towable 4 down. The electric motors do not have a true neutral.


Some RV parks are not frowning...

KOA Campgrounds To Begin Installing EV Charging Stations


Dutch
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Skibane

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Posted: 12/21/21 02:24pm Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

Charging via towing would likely cost far more than paying for grid power. The MH would burn significant extra fuel to drag a car that is resisting being pulled.


The OP asked about using regenerative braking, which only produces drag when the brakes are applied.

time2roll

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Posted: 12/21/21 02:55pm Link  |  Quote  |  Print  |  Notify Moderator

Skibane wrote:

The OP asked about using regenerative braking, which only produces drag when the brakes are applied.
All EVs that I know apply some base regenerative braking anytime they are coasting. May vary with speed. Many EVs will increase the regeneration when the brakes are applied.

Would be great if a 4-down EV could engage regenerative braking only when activated by a trailer style brake controller.

pianotuna

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Posted: 12/21/21 03:48pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

The only two I have read that can be towed four-down are Rivian and Bollinger.


Unfortunately Bollinger was a gigantic swindle. A lot of folks lost a LOT of money.


Regards, Don
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time2roll

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Posted: 12/21/21 06:25pm Link  |  Quote  |  Print  |  Notify Moderator

I have not given up on Bollinger yet.


FAQ:
When will you start production?
Production will start in late 2022.

Will the B1 and B2 be flat towable?
Yes, both will be flat towable.

https://bollingermotors.com/faqs/

* This post was edited 12/21/21 07:04pm by time2roll *

Matt_Colie

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Posted: 12/21/21 06:36pm Link  |  Quote  |  Print  |  Notify Moderator

We do not have a Diesel Pusher, but I have queried a number of EV engineering people about both towing 4 down and activating the regenerative braking. Nobody ever laughed and threw the phone down, but I have never gotten anything like a positive response from a company that was actually making anything. One product engineer thought it sounded like a good idea, but it was not on their list of things to include.

Matt


Matt & Mary Colie
A sailor, his bride and their black dog (one is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.


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