Zappi2 occasionally trips its rcd

[Mr Aargh]

Hi my zappi 2 trips its fuse (on its little daughter board with a single fuse for the Zappi). It does this roughly once every 6 weeks. Myenergi argue it is too intermittent to consider a significant fault. What could be the cause?

 

[johnb2713]

Is it the MCB thats tripping or an RCD?

What size MCB is it thats tripping and what characteristic?

What makes you so sure it's Zappi thats tripping it and not the car?

 

[Mr Aargh]

I believe it might be the zappi cause the car has not tripped any other system only ours at home.

It is the zappi's own little fuse (it's like a single mcb bolted on to the main fuse board) that goes but as you say I don't have a way of knowing what electrical item causes it.

 

[johnb2713]

I believe it might be the zappi cause the car has not tripped any other system only ours at home.

It is the zappi's own little fuse (it's like a single mcb bolted on to the main fuse board) that goes but as you say I don't have a way of knowing what electrical item causes it.

What rating and characteristic?

Zappi doesnt do very much that could trip a fuse, it's really only a switch that if conditions are right switches power on to the EV. Just out of interest does it ever trip the MCB when the car isnt connected?

 

[binky]

I believe it might be the zappi cause the car has not tripped any other system only ours at home.

It is the zappi's own little fuse (it's like a single mcb bolted on to the main fuse board) that goes but as you say I don't have a way of knowing what electrical item causes it.

Post a picture

 

[Murdoch]

How old is the device?

 

[johnb2713]

How old is the device?

Which device - MCB, Zappi, EV?

 

[Mr Aargh]

Mcb 5 yrs, zappi2 under 1 yr, eV under 1 Yr (2019 62kwh Nissan Leaf bough second hand)

 

[johnb2713]

Mcb 5 yrs, zappi2 under 1 yr, eV under 1 Yr (2019 62kwh Nissan Leaf bough second hand)

Reply to post #4?

 

[Murdoch]

Mcb 5 yrs, zappi2 under 1 yr, eV under 1 Yr (2019 62kwh Nissan Leaf bough second hand)

On the basis the zappi2 is less than 1 years old I would suggest you get the installer back

 

[johnb2713]

On the basis the zappi2 is less than 1 years old I would suggest you get the installer back

I personallty dont see how it can be the Zappi causing the problem. All it does is talk to the car and pickup a relay at the appropriate time supplying 240v to the EV after safety checks have been performed.

 

[Mr Aargh]

John, apologies. It doesn't trip when the car is not connected, no. And to post a pic as requested, of the fuse that it tripped, see attached.

 

[Murdoch]

John, apologies. It doesn't trip when the car is not connected, no. And to post a pic as requested, of the fuse that it tripped, see attached.

That’s an RCBO not a fuse.

Still think you should start by getting the zappi installer involved AND bear in mind not many sparks have proper test kit for EV chargers

 

[johnb2713]

John, apologies. It doesn't trip when the car is not connected, no. And to post a pic as requested, of the fuse that it tripped, see attached.

As per Murdoch's reply, I would ask your installer to have another look, it may be some odd earthing arrangement etc. I still feel it's more likely to be a car issue than the Zappi for reasons stated earlier.

 

[NozSpark]

Those GARO RCBO’s are known to fail,,, GARO have even changed the spec and it’s now got a different part number…. I bet if you can reduce the charge rate to 16A that it won’t fail…. They’ve found that they can’t run at full chat without failing (after a period of time)

The replacement GARO part number is RCBOGRB40EVS and they cost ITRO £35 (delivered)