Multiplus 3k as grid boost for a coffee cart

DIY
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1

I have a coffee cart that I’m looking to add a 12v multiplus 3k to as a grid boost. I have not used this feature in the past so I’m not overly familiar with how it works.

I already have a 12 400ah rack mount eg4 from another project that I would like to pair with a MP 12/3000.

So the setup would be rack battery and mp on its own cart plugged into the wall with the cart plugged into the mp output 1

I would like to set the battery charging current as low as possible and use the grid boost feature to avoid tripping the 15 amp breaker I find in most venues.

All my equipment is 120v. I have a La Marzocco GS3, a grinder, a water pump, and a small fridge. If these all hit at just the right time, I can trip a 15amp breaker, especially if there is already a load on it.

Im assuming my set parameters would be to keep total “grid” or wall plug load under 12 amps or 1.4kw.

So my question to people who have used the grid boost function is can it be used in this manner?

I assume that at some point the battery would be possibly discharging faster than the lowest charge current would be replenishing it, but most events aren’t more than a few hours.

2

The Multiplus handles this situation easily. Set the ac input current limit at 12A as you say and when running if it needs to deliver more than 12A of ac current then it will start to invert to make up the extra. In a standalone unit to program it you will need a Mk3 to USB interface and then a phone using VictronConnect (I have only used Android no idea about iPhone) or a laptop computer and you will need to vary input and charge current using this. You can get a “Digital Multi Control” panel which allows easier setting of the ac input current limit but not the charging current.

3

I was going to try and run Venus on a rpi4 with a cheap touch screen on the front panel, do i still need the Vebus dongle to make the inverter program changes ?

4

If you get your VenusOS online and connect it with VRM you can do the configuration with Remote VEConfigure which you can find under the device list.

5

Just to add further to @Christof correct reply, for remote programming you do not need the mk3 but you still need a pc or laptop to run the VE configure program on. You download the settings file from the inverter, edit it and upload it back.