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jejochen avatar image
jejochen asked

Charging EV with excess PV when battery full

Looking for a solution: using an ESS system, when homebattery is fully charged, ideally the excess solar power now is used to charge the EV if it is plugged in. Has anyone worked on such project? There are solutions to charge an ev with excess solar, but this doesn't include a battery in the system.

This one can be programmed together with the victron if i am correct, but have litteraly zero experience with this. Any thoughts?

https://github.com/goecharger/go-eCharger-API-v1/blob/master/go-eCharger%20API%20v1%20EN.md


ESS
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3 Answers
Rob Duthie avatar image
Rob Duthie answered ·

Hi

You can set one of the relays to switch when the SOC is at a certain point, by using VE configure.

On the Mulitplus inverter charger.

Regards

Rob D

NZ

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jejochen avatar image jejochen commented ·

Hi, thanks for the tought. I also considered this, but then there is tbe matter, that if you want to charge the ev when you need to, no matter what, there is no bypass option to start the charging. Also, when the relais switches on, the charger will pull full power to charge, instead of the excess solar power

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Rob Duthie avatar image Rob Duthie jejochen commented ·

Hi

You can set it up for exces power.

Regards

Rob D

NZ

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jejochen avatar image jejochen Rob Duthie commented ·

So i added the programmable relais assistent, but cant find any options to use the excess pv power. Can you point me al little further in the right direction?

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spicedreams avatar image spicedreams Rob Duthie commented ·

Hi @Rob Duthie@Jejochen I am also very interested in this. Could you please work through the steps in a little more detail to get this set up?

I am 100% off grid, no ESS.

Thanks

Graham (NZ)

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Rob Duthie avatar image Rob Duthie spicedreams commented ·

Hi

Yes you can by putting in a bypass switch if you want to charge the EV at any time. If on auto you can set to charge the EV on surplus power SOC setting by using a assistant like this order. SOC to suit.

programmable relay (size:169)

*) Use primary programmable relay.

*) Set relay on

*) when SOChigher than 99%.


programmable relay (1) (size:30)

*) Use primary programmable relay.

*) Set relay off

*) when SOClower than 98%.

Regards

Rob D

NZ



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spicedreams avatar image spicedreams Rob Duthie commented ·
Thanks @Rob Duthie

Elsewhere in the community we are warned not to exceed the EasySolar's power rating- but would that be the solar charger's rating 70 A @ 250 V DC, or some parameter of the Multiplus?

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Bogdan Nedelcu avatar image
Bogdan Nedelcu answered ·

I posted a quick script to prevent draining the batteries while a large consumer draws power from the system.

https://community.victronenergy.com/questions/113114/software-attenuation-for-home-excess-pv-charging-o.html

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Lucian Popescu (Victron Energy Staff) avatar image
Lucian Popescu (Victron Energy Staff) answered ·

We have a new product, capable of doing this:
https://www.victronenergy.com/accessories/ev-charging-station

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Rob Duthie avatar image Rob Duthie commented ·
When are these availble in New Zealand?
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