Charging Battery at night rate

Very impressive!!

How do you configure these in series and parallel? And how does the footprint compare?

Where do you store them? Are they safe in an attic with heat and dust?

I am in much the same position and I have also been pondering, have 30Kw battery and 2 EV chargers wired into the ESB meter box on a 32A circuit, then the washing machine and dishwasher also comes on at night all off the back of a 63A fuse on the CU and 80A ESB fuse.

So here is the setup,

• EV chargers are set to prioritize one charger over another so when the master charger is finished the slave kicks in (That's on a Home Assistant automation) so 31A for 9hrs
• Figure that I will need about 27kw to the batteries so that's 3Kw per hour 14A (Manually set with Solis App)
• Will manually set the Dishwasher and Washing Machine to come on at separate times, so an additional 13A when elements are heating.
• The house load at night is normally around 900w - 4 A

So that's 62A in total (Worse case scenario), when the kettle goes on thou will be the craic.

And the zappi can load balance very well. In winter it keeps my grid draw at a steady 14.7kW (on my 12kva connection) when I'm charging the car and charging the home battery during night rate hours. When someone puts on the kettle, the zappi will simply reduce charging speed. No chance of the fuse popping!

Do folks here really have two Zappi's? I have two EVs, but managing fine alternating different evenings when I have to charge at night time.

Oh she will notice that alright

For that reason I have an outdoor waterproof socket on its own 16A RCBO with a granny cable attached to it. Although our mileages are a bit over average and well below average, so not really any need for it. Just handy to have. Granny cable comes with the car, so is free too.

Yes and should both our mileages increase drastically, we shoukstill be able to charge both. I also did this as I expect the "night rate slot" on a smart meter to be shorter and / or in general have small slots with cheap or free electricity where it would make financial sense to draw the max I possibly can from the grid

9 hours times 7kW = near 60kWh into each car every other day. That's 30kWh per car per day, or near 200km. Who has 2 EVs in their household that both do a commute of well over 200km per day? I'd well less than 1% of the population.

Battery capacity is in kWh (kilo Watt hour). How long it takes to fill from empty to full depends on your inverter power (in kW). If your inverter is 5kW, it takes one hour to fill up 5kWh 🙂

Hi Jonas and welcome to boards!

I've got a Sunsynk (rebranded Deye) inverter. But it doesn't really matter. And for sure you can put in a system with a hybrid inverter and a battery, without having any solar panels. Charge up the batteries cheaply at night and use it during the day. Or even export it back to the grid during the day for some nice rewards! To give an example, I only buy night rate at 5c / kWh and I do export anything I don't use at 27c / kWh

As for where to buy, that varies. Start a new thread with your budget and your aims, and the people in here will give you good advice on what to get

Hey, late to this, but what is this set up? From your rate description I'm assuming the 7.9 is for a 2-4 / 2-6 window? I'm just figuring out how you fill 30kwh of batteries in such a window if those assumptions are right.

I've been on a smart meter and the Pinergy EV plan for nearly a year now. This is working out very well. I pay just 5c / kWh now and they pay me 25c / kWh for anything that I export. I normally don't really keep track, but someone asked, so I did the sums over last month:

Exported 1835kWh, €459. Imported 1320kWh, €66. Standing charge €30. Total bill for the month, minus €363

Is this possible to set up on an Eddi?

I am not having any luck on google trying to figure it out

I am trying to charge the batteries on the night rate. I couldn't see an option in the Eddi for the batteries.