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We are still going on our conversion so I have no experience with cold temperatures affecting EV batteries. I do however have a 4 bed house on 40 acres in Central NSW (Oberon to be exact). The weather jokes for Oberon go along the line of "In Oberon last year summer fell on a Tuesday." and "There ar...

Hi Ron I note, as did someone else in another post to you, that you appear to be keen on wet LA batteries whereas everyone seems to "bag" them! My mate and I are in the process of converting a Suzuki Swift and are tossing up between wet LA, SLA, AGM and Gel batteries. The SLA, AGM and Gel batteries ...

Thanks Richo - I better understand now.
Regards
Paul

Thanks Richo for the analysis. To answer a few of your questions which I did not make clear originally: a)"Yes the kinetic energy stored in the moving vehicle is converted to power back into the batteries and stops the car when Ek=0. Mechanical brakes are not needed for this to happen." No but I wou...

I think Woody's summary of regen braking with his a,b,c,d analogy is what I am thinking of by asking the original question. I don't actually care about regen "braking" but am aiming at regen "power" to the batteries. As Woody says, rolling resistance and drag are energy "expenditures" that can never...

Who's on first?? Or is it watts on second!

Thanks tons Johny for the really slow reply!! Talk about faster than a speeding bullet!

Paul

Hi People I asked about an alternator from the donor vehicle being used to partially re-charge an auxillary battery or the main battery bank in a previous post titled "Silly Charging Idea No1". I have noted that this idea is also being discussed in other topics - the most recent discussion being in ...

Here I go again. Again this is not so much a charging idea as a reduction in power drawn idea. It was explained to me that spoilers on the back of race cars have a fairly pronounced effect on keeping the back of the car down on the road. This is apparently different from many spoilers on the back of...

Thanks tons acmotor - the concept, with yours and the others help, is starting to become clearer!
Thanks again
Paul

Sorry people but I am still confused. I thought my drag coefficient was dependent on my frontal area (among other things) but your replies seem to say drag coefficient is separate from frontal area. I note acmotor's red suzi has a frontal area which is almost "flat on" (perpendicular) to air onrushi...

Hi people, As we know the frontal area of a vehicle influences drag. My question is how do I measure frontal area? I can easily measure the distance from the roof to the bottom of the car and multiply by the width of the car to get the frontal area - correct? However doesn't the angle of the windscr...

I would welcome more silly ideas - you never know when two silly ideas put together could work! Your idea sounds slightly silly whereas mine may have been in the fairly silly category. I have a property in the Blue Mountains west of Sydney which is solely powered by solar panels and a wind turbine. ...

Hi People, This one is not so much a charging idea as a reduction in current drawn by my accessories. My silly question is would it be possible to use 12V Dc Compact Flouro's as headlights? When I asked my mate (the car mechanic) his immediate reaction was that headlights need a high and a low beam....

Hi people, With all the bright and experienced people on these forums my mate and I would like some comments on one of our weird ideas. Who better to ask than you lot!! My motor mechanic mate and I are intending to convert a Suzuki Swift, using Goombi/Eugen’s kit and have been “brainstorming” as man...

Just to make this clear in my own head the concensus of opinion is that a 96v battery bank (120ah capacity) with 96v dc motor with a 72v controller would not work? Or is it that it would work but overheat something or would work but only at a 72v performance standard?
Thanks in advance
Paul

Thanks very much for the replies - much appreciated.
Paul

Hi all

I am a real newbie so I am not sure if this is a silly question. Does the voltage of the controller need to exactly match the voltage of the motor. For instance 120v controller with a 144v motor or say a 72v controller with a 96v motor?

Thanks in advance
Paul