Battery - to take advantage of 2am to 5am cheap rate electricity - v2

Import 45 units, produce 100 units, use 25 units yourself, so indeed: export 120 units

So yes 3 hours of importing 15kW (=45) and 21 hours of exporting 5.7kW (=120). Only a boggo NC6 required for this

Should be the same for your setup. This time next year, irishchris, we'll be millionairs!

Like the sounds of that delboy 💰💲

Definitely food for thought for mine too 👍

So yes 3 hours of importing 15kW (=45)

@unkel I presume an additional 10kW of battery chargers are needed for this unless my sums are wrong? (Charging from a 5kW/NC6 Inverter for 3 hours would get a nominal 15kWh vs 45kWh above)

If so, I would be interested to hear how the chargers would be all wired up(in parallel?).

I was doing some further searching on the topic & came across this on ESBN site. Summary below with more details via the link above.

Seems to suggest that over the 3 hour EV window, that (assuming no EV in the mix) the realistic max with 12KVA after losses would be around 30kWh of battery charge per night? This would increase to circa 40kWh per night with a 16kVA connection. They also state that the max demand below is averaged over 10 mins so the figures above might be de-rated for the full 3 hour continuous window.

An EV could take a big chunk out of all this.

Yes perfectly compatible with solis as that is what I connected it to.

Not in conjunction with dyness but could sell it and get second gobel

Plug and play. 12kwh usable if discharging to 15%

No ongoing maintenence above any other battery

Literally just connect positive cable, negative cable and the can communication cable.

Then connect PC to it via the rs485 cable that comes with it and select pylontech battery.

That's it. Then just enjoy the extra capacity of the battery

Nice! Is the rectifier connected to the same AC line that feeds the inverter?

I never used any separators, but I use CALB cells that are rigid and have cooling fins, not EVE cells that have much thinner and more flexible enclosure

Yeah those CALB cells have the ideal case for DIY. Check voltages on cells and all showing 3.29 so happy with that. Just need to get some ring terminals for the bms and think about whether to use a separator between the cells, especially as i wont be compressing the cells.

Yes they can. No issue.

Yep. I draw 14kW constantly between 2AM and 5AM every single night (on a bog standard 12kVA connection). Half of that is for my cars, the other half mostly for my battery, I might have an appliance or two running sometimes as well. If there is anything at all left out of that 14kW, it goes towards heating my hot water.

Christ no. Positive is connected to its own breaker, then to positive busbar (along with the other positives, like the one from the inverter). Negative is connected to negative busbar, which is connected to a heavy duty breaker and then on to P- side of the BMS. Gotta protect your battery / cells!

Would anything be stopping you from feeding the rectifier directly with a V2L input? I know you have a lot of battery capacity already but for those with smaller batteries, it could be a good way to get access to more battery capacity for a relatively small investment.

Yes you could do that, but you would just be taking from your car battery and sticking it into your home battery. I guess if you had free work charging or something like that it could make sense. Drain the car overnight into your home battery every night and charge up in work again the next day 😀

Yep. In fact that is exactly what I did with my 1996 EV last winter with my rudimentary home made V2H solution 😀

When I ran out of home battery, I switched on the connection from my car's high voltage battery into my Solis PV inverter. Which then took its max draw from the car and dumped it into my home load first and if that was lower than about 2.5kW, then the rest into my home battery