Solar PV battery options

samdeluxjones wrote: »

Are the LifePO4 connected in series with the Pylontech then?

I don't have Pylontechs. My 10kW of LiFePO4 cells from AliExpress cost slightly more than a 2.4kW Pylontech unit.

SD_DRACULA wrote: »

Is that safe for them to operate without a BMS?

I have a BMS. You really do need one. But the inverters calculate their own SOC based on the voltage of the battery and the parameters you set for your storage in the inverter.

So you can happily have a battery bank which is not integrated with your inverter.

SD_DRACULA wrote: »

That's what I thought.
What type of BMS did you use if you don't mind me asking, I might go down the diy route eventually

I got an 80Ah 16s TEYO. It seems identical to the DALY

SD_DRACULA wrote: »

Cool and that just works plug and play with the Solis?
I did come across the DALY alright.

No. The batteries and BMS are completely independent. You can go down the route of getting the Australian one which would appear that it will emulate a Pylontech. Otherwise, you have to enter several parameters into the unit, entered as though it is some form of modified Lead-Acid setup

DrPhilG wrote: »

Dammit...

Batteries were due to hit Poland no later than today. No sign this morning so I sent the seller a message on AliExpress. Got no response but I just got a notification on the app of an "extension to delivery time".

Estimated delivery time still says April 17th to May 8th.

At what point do I sling in a dispute?

From my experience with Aliexpress they won't accept a dispute until weeks after the expected delivery date. You can find out how long by beginning to submit a dispute where it will show you the date then by which you can officially open one then cancelling out

I was doing some research on the lifepo4 batteries on ali and I did come across some sellers that said they had shipment from Poland which did include customs and maybe shorter delivery time so maybe that's something to look into in case this doesn't work out.

Oh I see, so not actual stock in Poland still coming over from China.

My batteries arrived a few weeks ago, set the pack up, but haven't got a chance to do the BMS yet, so it's not connected to my inverter. I have to say this supplier is excellent, the batteries were super well packed, are great value for money and all the bus bars, bolts and washers were all there too. The Poland route is great as the seller uses that as a way to handle customs / EU VAT. The shipment to the end consumer (us) comes from Poland which is in the EU, so we do not owe anything in tax or duties, so €1300 for 10kWh landed

DrPhilG wrote: »

You used the same supplier as I did didn't you? Oye Store?

How long from order to arrival overall?

No, mine are from PWOD Official Store. Took nearly 2 months.

Go back to the beginning of this thread. Not only are there links but a diagram of how to wire it up fully

I had some arrive via Poland left on front door step last week . Bit under 2 months with oye on Ali 200ah lishen seem new. Not for house use different type project very happy with them. Once they arrived in Poland the ups tracking worked. No tax just price paid to Ali. Will consider more for house once got a better feel for lifepo4 from this project.

You mean like it just did?

Yesterday's Irish Independent reported that Pinergy is planning to raise its rates from the 11th of June. The move will add €120 to the typical bill over a year.

This is after 7 Irish Energy retailers have already raised their rates this year.

Not to mention, it's now been just months since all residential electricity users were hit by a 130pc rise in the public service obligation (PSO) levy, adding almost €90 a year to household electricity bills.

I seem to be dumping a lot onto the grid even with the battery and I don't have one of the "stupid" meters that go backwards so will probably go for it since I don't see why not.