neilk
Posts: 3
Joined: Wed Mar 11, 2015 2:53 pm
Delivery Date: 11 Mar 2015
Leaf Number: 003837

Variable charge rate

Wed Aug 10, 2016 11:50 am

I have a 6kW LEAF and at home I have a 5kW wind turbine. It is windy here (Orkney) most of the time and so the turbine works really well and last year delivered 16MWh. But unfortunately the car always draws 6kW, so I have to import at least 1kW, usually more from the grid.

What I'd really like to do is be able to set the car to take 3kW or something over a longer time, knowing that it will probably be windy overnight and I'd make better use of the available power. Ideally I'd like a more intelligent charging process and whilst there are some controllers that will shove 'spare' power (from pv or wind or whatever) to a circuit it does involve a load of hacking about to the supply. A simple turn down on the power demanded by the car would be easier.

Of course if we are going to get really smart the car ought to know what time I am going to want it the next day, and then sip just enough juice to fill by that point. At the moment it gorges on all it can get as soon as it is plugged in and then afterwards sits there bloated whilst the turbine shoves power out to the grid.......

User avatar
DNAinaGoodWay
Posts: 2751
Joined: Mon Dec 17, 2012 1:43 am
Delivery Date: 03 Dec 2012
Leaf Number: 23156
Location: Central Massachusetts

Re: Variable charge rate

Wed Aug 10, 2016 12:05 pm

Is your power out to the grid paid at wholesale or retail? I assume wholesale given your question.

You only need to get an EVSE with a lower power rating, like 3
kW, or a variable one like EVSEupgade, and your car will be limited to what the unit can put out.
'12 SL last reading @ 2 yr, 22k, 260 GIDs, 62.35 Ahr

'15 SV w/QC, Mfd 5/14, Leased 8/14, 292 GIDs, 64.38 Ahr when new
@ 36 months, 34k, 270 GID, 57.49 Ahr

'17 Bolt LT



6.72 kW Array

User avatar
DNAinaGoodWay
Posts: 2751
Joined: Mon Dec 17, 2012 1:43 am
Delivery Date: 03 Dec 2012
Leaf Number: 23156
Location: Central Massachusetts

Re: Variable charge rate

Wed Aug 10, 2016 12:21 pm

This looks good. Power output control and wifi programmable.

https://www.amazon.com/gp/aw/d/B019DKKR ... ref=plSrch

BTW, have you found http://www.leaftalk.co.uk

Edit: looking deeper, that EVSE gets bad reviews, but I'm sure there's a unit out there that will meet your needs.
'12 SL last reading @ 2 yr, 22k, 260 GIDs, 62.35 Ahr

'15 SV w/QC, Mfd 5/14, Leased 8/14, 292 GIDs, 64.38 Ahr when new
@ 36 months, 34k, 270 GID, 57.49 Ahr

'17 Bolt LT



6.72 kW Array

LeftieBiker
Posts: 7128
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Variable charge rate

Wed Aug 10, 2016 1:11 pm

If you have the time to charge on L-1 (120 volts), that should solve this problem.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

User avatar
DNAinaGoodWay
Posts: 2751
Joined: Mon Dec 17, 2012 1:43 am
Delivery Date: 03 Dec 2012
Leaf Number: 23156
Location: Central Massachusetts

Re: Variable charge rate

Wed Aug 10, 2016 1:56 pm

LeftieBiker wrote:If you have the time to charge on L-1 (120 volts), that should solve this problem.


No 120 in Orkney Islands
'12 SL last reading @ 2 yr, 22k, 260 GIDs, 62.35 Ahr

'15 SV w/QC, Mfd 5/14, Leased 8/14, 292 GIDs, 64.38 Ahr when new
@ 36 months, 34k, 270 GID, 57.49 Ahr

'17 Bolt LT



6.72 kW Array

jjeff
Posts: 1455
Joined: Wed Jan 13, 2016 9:10 am
Delivery Date: 13 Jul 2014
Leaf Number: 422121
Location: MSP MN

Re: Variable charge rate

Wed Aug 10, 2016 2:17 pm

Lots of EVSEs that let you adjust the charge rate. I believe 6a is the lowest the Leaf goes and ~28a is the highest it can go.
Most if not all the openevse EVSEs or something like a Juicebox will let you adjust the output amperage, of course a EVSEupgrade'd EVSE is also a good option for 6-20a charging.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a

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