On-grid domestic battery storage

Starfrog

EVandPV said:

Starfrog said:

chamelion said:

Starfrog said:

chamelion said:

Starfrog said:

EVandPV said:

Just scored a one year old 2.4kwh Pylontech for £715 delivered on fleabay.
Still one left of anyone's interested.

https://www.ebay.co.uk/itm/Pylontech-US2000-Plus-2-4-kW-Li-Ion-Battery-Pack-48V/325089961309?mkpid=0&emsid=e11021.m43.l3160&mkcid=7&ch=osgood&euid=c798941d6ad5429189347923aa61f552&bu=43022666713&ut=RU&osub=-1~1&crd=20220308031453&segname=11021&sojTags=ch=ch,bu=bu,ut=ut,osub=osub,crd=crd,segname=segname,chnl=mkcid&pageci=e592a3e6-60e0-4094-aa85-b7cb40dfba11&epid=3029963771&redirect=mobile

I purchased my ones direct from this company and they arrive tomorrow. I think its a good price for brand new one inclusive of Vat at £765 for a 2.4kWh US2000C (I bought 5 of them and they give you a £15 discount per battery on orders over 4 batteries so the saving made my shipping cost only around £19 for all of them. 

PylonTech US2000C with 95% DOD - Trade Prices, next day delivery – ITS Technologies

I 2nd this. You missed a group purchase a couple of months back (See my earlier posts) where I got a stack of batteries to make use of a per battery discount for an order over 4 batteries, plus savings on shipping. 

Batteries all arrived on a palette, no issues. 

out of interest how much power should i expect that the batteries will supply to my home power consumption if I have 5 of them ? you have 3 so im thinking it will be at least that ? 

ah my signature is out of date. I'm up to 3 x 2.4kw and 2 x 3.5kw batteries now. I have a high energy use home and I consume every bit of solar in house usage alone for 90%+ of the year... I load up my battery bank with cheap power overnight on intelligent octopus, which basically runs my entire home from 5:30am to about midday (currently - this will extend significantly as we move to summer and i generate more on PV) before hitting my minimum SOC on the battery. I then switch over to the 'expensive' day rate until the next slot i'm granted. 

I guess im looking for the cover it will give for say running my electric shower at 8kWh will the batteries cover it or will i still need to draw from the grid ? 

The max output is 3.6kw from one Lux ac controller with 3 or more Pylontechs (1.2kw output per 2.4kwh Pylontech module).
You would need 2 parallel Lux controllers to increase to a max of 7.2kw with 6 Pylontechs.

how would that look when configured ? maybe i can just get a bigger hybrid controller that limits the export to grid to 3.6 that way i can also begin to maximise my solar production as currently it keeps clipping at 3.5 and hmmm maybe theres a Lux that would give me 6k from solar and then add the solar and batteries to give me a increased total cover for consumption. I suspect Id add a total of 8 pylontech batteries (8 giving me 19.2kwh) 

newbuilder

Would another way in the short term be to buy a second inverter, parallel it up and run aoboet on one and Pylontech on the other?

Starfrog

Im just not clever enough to do that, id end up blowing all the fuses and probably setting alight my hair 

EVandPV

newbuilder said:

Would another way in the short term be to buy a second inverter, parallel it up and run aoboet on one and Pylontech on the other?

He would need 2 completely new Lux controllers to do that.
The ac controller he has doesn't allow parallel connection to another Lux, there is a specific model of Lux controller that allows connecting 2 of them in parallel.
@solarchaser has this type of setup.

Starfrog

EVandPV said:

newbuilder said:

Would another way in the short term be to buy a second inverter, parallel it up and run aoboet on one and Pylontech on the other?

He would need 2 completely new Lux controllers to do that.
The ac controller he has doesn't allow parallel connection to another Lux, there is a specific model of Lux controller that allows connecting 2 of them in parallel.
@solarchaser has this type of setup.

how about i get a lux controller and replace the one I have now with the new one at higher specification and output ?

EVandPV

Starfrog said:

EVandPV said:

newbuilder said:

Would another way in the short term be to buy a second inverter, parallel it up and run aoboet on one and Pylontech on the other?

He would need 2 completely new Lux controllers to do that.
The ac controller he has doesn't allow parallel connection to another Lux, there is a specific model of Lux controller that allows connecting 2 of them in parallel.
@solarchaser has this type of setup.

how about i get a lux controller and replace the one I have now with the new one at higher specification and output ?

I'm not aware there is one with a higher output.
As far as I know, they're all limited to 3.6kw and you'd need 2 parallel controllers to get up to 7.2kw.

Solarchaser

As EVandPV says I have the parallel ac3600.
I have 4 batteries on each, and peak output is 3.6kw... well actually it's more like 3.45 -3.5kw.

So when using the 10kw showers I still import around 3-4kw depending on baseload of the house.

I've been turning over in my head whether to get another parallel inverter to try and cover the showers.
If im generating more than 3.5kw from solar the showers are free.

The problem is that not many people have a shower in the middle of the day when the sun is out.
Today I exported 12kwh to the grid, then the sun went down and the house had 3 showers... hmmm!

So the other option which is more in line with green and ethical is going with a hot water tank that's heated by a solar diverter and converting the two showers to thermostatic from electric.

Cost wise the hot water tank has it hands down, say £1200 for a 250l tank which will "absorb" say 15kwh a day (depending on how much its used, and so how cold the water in the tank is), as well as not using gas to heat the hot water. (I bought a diverter for £100 a couple of years ago)
Vs say £3800 for an inverter and 4 pylons.
However it's inflexible. 
Batteries can be used for so many things, but hot water tank can only hold hot water.
Batteries won't fight each other for the electric, but solar diverter and batteries probably will to some extent, and occasionally when my white goods loving wife has her many "tools" on, even the 7kw from the parallel inverters can't keep up, so another inverter would take the edge off.

I'm about 70% on the hot water tank tbh.
Gas combi atm, which I can perhaps rig up to heat the water in the winter.... or maybe just heat it with off peak leccy.
Trying to get octopus to give me a guarantee of how long I'll have the current prices to be able to calculate whether I'll have to rig up gas for the winter (cost based, not need based).

newbuilder

Has anyone been able to get the Luxpower inverter to link with their home wifi to avoid hanging out in cold garages with standing on one leg, stretching to see their other meters in the house whilst trying to keep the inverter wifi signal on their phone?

Are there dangers to bringing the inverter on board home wifi? How has one done it?

Starfrog

Solarchaser said:

As EVandPV says I have the parallel ac3600.
I have 4 batteries on each, and peak output is 3.6kw... well actually it's more like 3.45 -3.5kw.

So when using the 10kw showers I still import around 3-4kw depending on baseload of the house.

I've been turning over in my head whether to get another parallel inverter to try and cover the showers.
If im generating more than 3.5kw from solar the showers are free.

The problem is that not many people have a shower in the middle of the day when the sun is out.
Today I exported 12kwh to the grid, then the sun went down and the house had 3 showers... hmmm!

So the other option which is more in line with green and ethical is going with a hot water tank that's heated by a solar diverter and converting the two showers to thermostatic from electric.

Cost wise the hot water tank has it hands down, say £1200 for a 250l tank which will "absorb" say 15kwh a day (depending on how much its used, and so how cold the water in the tank is), as well as not using gas to heat the hot water. (I bought a diverter for £100 a couple of years ago)
Vs say £3800 for an inverter and 4 pylons.
However it's inflexible. 
Batteries can be used for so many things, but hot water tank can only hold hot water.
Batteries won't fight each other for the electric, but solar diverter and batteries probably will to some extent, and occasionally when my white goods loving wife has her many "tools" on, even the 7kw from the parallel inverters can't keep up, so another inverter would take the edge off.

I'm about 70% on the hot water tank tbh.
Gas combi atm, which I can perhaps rig up to heat the water in the winter.... or maybe just heat it with off peak leccy.
Trying to get octopus to give me a guarantee of how long I'll have the current prices to be able to calculate whether I'll have to rig up gas for the winter (cost based, not need based).

have you looked at the mixergy water tank its the one I intend to purchase when i move my hot water off the oil tank (scottish highlands so no gas) My oil that i tried to order today is now on ten days out and they have said they dont know the price but expect it to be a lot higher than normal !! i only need it for taking the edge of the remaining cold nights as we enter summer time 

Solarchaser

Newbuilder, yeah I've always been on wifi with the lux, no issue.

Starfrog yeah I have, it seems a good system from the point of view of efficiency, however it still has the water used stored in the tank.
I'm not a fan of dead water in large vessels, it needs to run a legionella cycle because of that.
I prefer the idea of a thermal store where the water stored is the "dirty" water which is used to heat a copper coil, and its just the coil that carries the potable water.
So imo the mixergy is more efficient,  but the thermal store has less risk of contamination of the potable water