imolazhp
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Mon Feb 01, 2016 5:42 pm

davewill wrote:This mod is a "cheapskate" conversion, and doesn't change the electronics over to run off 240v. It requires a 4-wire outlet with a separate neutral and ground so the electronics can run off of 120v while the car uses 240v. That means you can't run it off a 10-30 or 10-50 which only have 3 wires (2 hots and a neutral). You need a 14-30 or 14-50, or the specified L14-30. Making an adapter to run it off of 120v should be pretty easy, though.


maini wrote:1) Yup a AWG 10 will work great
2) Use anything which has 4 prongs.. it will be fine.. just make sure you match the socket and plug properly
3) You definitely need Neutral as the EVSE checks for Ground before beginning to charge the car. It does not need Neutral to charge but needs neutral to run the EVSE circuit (as pointed out by all the EVSE circuit runs on 120V hence the need of one hot and the neutral). So you need to make modifications in your wall sockets if possible.
4) Keep the length of adapters 1-2 feet max.

L2 will change your life and the overall efficiency of your charging goes up a lot more.. you do a lot of service to yourself and the environment by moving to L2 charging :)


Thanks for the responses. I was afraid of that answer about the Nema 10-50; I pretty much knew that was going to be the answer, but asked anyway. I'm not sure I can change the wall outlet and the plug on the tankless/instant hot water heater without raising too many eyebrows, but I might be able to, I will look further into it. There is a 480v Nema L14-30 even closer to where I park for a welder we have. Too bad I can' use that!

maini
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Sun Feb 21, 2016 3:26 pm

I am sure there is a way you can leverage that 480V socket.. assuming it has multiple 120V or 240V phases. Do check with a wiring Electrician or on Google on how that is exactly wired.. there might be a way to use it.. I am not an expert on commercial power or 480V stuff.

BTW: over 400 charges and all going well no problems.. cannot complain about this Mod...
2014 SV Cayenne Red with LED and QC port

jjeff
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Sun Feb 21, 2016 4:56 pm

maini wrote:I am sure there is a way you can leverage that 480V socket.. assuming it has multiple 120V or 240V phases. Do check with a wiring Electrician or on Google on how that is exactly wired.. there might be a way to use it.. I am not an expert on commercial power or 480V stuff.

BTW: over 400 charges and all going well no problems.. cannot complain about this Mod...

A 480v socket will do you no good with any EVSE's I've seen. 3 phase commercial power is often 277v per leg(from neutral) and 480v between any of the 3 277v legs. Unfortunately EVSE's top out at ~260v max so personally I wouldn't want to use 277v, just too high IMO. It's possible to purchase a large transformer to convert the 480v 3 phase to 208v 3 phase but they are large, expensive and very heavy. Believe me I'd love it if I could use 277v but it's just not in the cards.
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

maini
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Tue Feb 23, 2016 11:36 am

That makes sense... 277V could be too high for the EVSE or even the charger to handle... Unless you can leverage that for the Fast charger port CHADEAMO?? I am sure you could get that from somewhere.. but I expect that to be very expensive..
2014 SV Cayenne Red with LED and QC port

arnis
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Tue Feb 23, 2016 3:54 pm

12A at 240V is better than 10A at 240V. In Europe EVSE is limited to 10A over household plug.
Though it should be up to 13Amps constant and 16Amp maximum.
It was limited to 10A because people were dumb enough to plug trickle charger to random
not dedicated lines and multisocket extension cords. So adding a incandescent bulb was already too much :D

When I bought my Leaf I had to charge it somehow. So i bought dedicated 160 foot extension and plugged
it into dedicated socket. Used the trickle charger. Then noticed that the cable was too warm, especially 10 feet
that were left on the drum. So after small research I concluded that cord was weak. 1,5mm² (16AWG) rated.

Its ok to use 16AWG for 16 amps but only unrolled, short and not covered. Way too dangerous for grannys.
Also voltage drop wastes energy. I lost something like 15% on that extension alone :lol:
This is why all Level1 chargers should be connected to 14AWG wired dedicated plug. Including this modified EVSE.
Circuit breaker dedicated for trickle charger should be 15A in US and 10A in EU for maximum safety, including this mod.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

maini
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Wed Mar 02, 2016 5:49 pm

I recommend using 12AWG for the above modification... I think I mentioned that somewhere right in the beginning. I replace the original plug and wire with a 4 core 12AWG wire as that is the type of cable I found in the original 110V plug/wire.

IMO 16AWG is too less to handle 12A or in that case even 14 AWG is just borderline. 12 AWG is good and never warms up..
2014 SV Cayenne Red with LED and QC port

arnis
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Thu Mar 03, 2016 5:12 am

Opinions don't matter! Any 10 year old would say that thicker cable is better.
What is "borderline"? Do cables get thinner with years? Or do EVSE-s suck
more juice with time? Rating is rating. This is recommended thickness, not minimum
thickness. We don't want to waste resources on "what if" situations.

if there are no technical reasons to use 10AWG then there is no reasons to to so.
An opinion on using "more powerful" fuse is worse than sticking to recommendations.
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

maini
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Leaf Number: 339745
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Thu Mar 03, 2016 12:51 pm

arnis wrote:Opinions don't matter! Any 10 year old would say that thicker cable is better.
What is "borderline"? Do cables get thinner with years? Or do EVSE-s suck
more juice with time? Rating is rating. This is recommended thickness, not minimum
thickness. We don't want to waste resources on "what if" situations.

if there are no technical reasons to use 10AWG then there is no reasons to to so.
An opinion on using "more powerful" fuse is worse than sticking to recommendations.


AWG 14 will slightly warm up and AWG 12 won't warm up... the original cable was AWG 12 hence AWG 12 is what you should go with..
By borderline I meant that its running close to its capacity.. hence some warm up.. which is not good... Any EE will tell you that warming up of wire conductor is bad and very detrimental to its conductivity hence losses growing exponentially with temperature
2014 SV Cayenne Red with LED and QC port

jjeff
Posts: 1083
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Leaf Number: 422121
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Thu Mar 03, 2016 4:10 pm

maini wrote:
arnis wrote:Opinions don't matter! Any 10 year old would say that thicker cable is better.
What is "borderline"? Do cables get thinner with years? Or do EVSE-s suck
more juice with time? Rating is rating. This is recommended thickness, not minimum
thickness. We don't want to waste resources on "what if" situations.

if there are no technical reasons to use 10AWG then there is no reasons to to so.
An opinion on using "more powerful" fuse is worse than sticking to recommendations.


AWG 14 will slightly warm up and AWG 12 won't warm up... the original cable was AWG 12 hence AWG 12 is what you should go with..
By borderline I meant that its running close to its capacity.. hence some warm up.. which is not good... Any EE will tell you that warming up of wire conductor is bad and very detrimental to its conductivity hence losses growing exponentially with temperature

"Warming up" also wastes electricity :) I'm not saying a person would need 10 gauge for a 14a load but if your cable is getting warm to the touch, it would be best to jump to the next sized wire. Way oversizing isn't really helpful but IMO your always better to be a bit oversized than under(in wiring that is :lol: )
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

arnis
Posts: 668
Joined: Sat Jan 23, 2016 3:21 pm
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Leaf Number: 015896
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Re: Cheap L2 EVSE by converting the 2013-14 Nissan L1 EVSE - $25

Thu Mar 03, 2016 6:14 pm

What is warming up? AWG7 would also warm up.

So how much? Now we get serious guys! Crunch some numbers to satisfy me :geek:
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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