HI I have a Victron EV charger connected to my Victron Offgrid Eco system. Recently we bought a second EV. It came with its own wall charger but it is a constant output. Id like to put in a second Victron EV charger.
Q1. Will they work together to share the Available Solar Surplus.
Q2 Can I prioritize one over the other ie, set Charger 1 to always charge at say 70% of the available solar, and unit 2 to take the remainder?
Thanks
Ty
Hello
I have same question. Did you try ?
Hi Zoic21,
Yes I have two on the wall and depends on their operating state they both work well. - Note, I am off grid, so Solar and Batteries only.
If in Auto - (both Ev’s plugged in) they share the available solar, the only issue is when the min current setting exceeds the available solar. Ie if they are both set at 14amps min, and the available solar is 5kw (22 amps) there is a 6 amp shortfall, this comes from the battery. I have my battery time set at 30min, so they will run on for 30 min drawing the excess from the battery. I used to have this value set at 10amps.
In manual they just run to what ever you set, I will often put the Tesla in Manual at say 16amps, and the BYD in Auto. So the BYD will ramp up and down with the excess available solar.
Only ISSUE I have - Victron if you read this please fix it .
So in an off grid scenario, and the battery is 100%, all the solar is ramped down to only supply the load, plug in an EV on Auto and it starts and just sits at its min current setting. It doesn’t ramp up the solar for the EV to reach max charge current setting of the charger. The solar ramps up to meet the new load, house plus EV min charge, but I want it to allow the EV charger to ramp to 28amps if the solar can support this load.
My install has 1 x AC coupled 5kw and 16kw of DC coupled solar, so the frequency might be 52hz and the EV will just trickle charge at the min Amps. There needs to be an off grid selector in the config, so when you plug in Auto mode, the EV is allowed to ramp to 100% output for x amount of minutes, and then throttle back according to available solar / load as normal.
For me this is a daily occurrence, my batteries are generally 100% by mid morning, and the EV’s charge at min rate if plugged in after the battery reaches the 100% (ie we come home mid afternoon) Currently the solution is to put it in manual at say 22amps, just have to remember it is like this when the sun goes down so you don’t draw from the battery and take up 60% of the inverters capacity charging the car alone from battery.