Dynamic electricity pricing finally coming this year

Yeah, DIY is the way to go for absolute profit - but as you say, even off the shell battery prices have never been cheaper than they are now. I'll guess probably 30% cheaper than when I bought my 8.5Kwh back in 2021. I did some investigation and it's estimated to come down a little more, but not much (5% or so in 2025) and then plateau out. Course that's all speculation.

Depends on the quote/capacity/FIT rates, but I'll ballpark that most off-the-shelf would probably pay for themselves in 2-3 years.

As for the dynamic pricing itself - I'm very very curious to see what algorithm I can develop myself to cycle the BEJASUS out of my storage :-)

Boxes do pay for themselves (technically) as they keep the temps of the cells up and in turn that saves you kwh since they don't like the cold, but there is always the ghetto plywood option.

They also add compression which will make the cells last longer and keeps the swelling down.

Well yes it you can DIY the job it's obviously gonna be cheaper, discounting the cost of the education you received to gain such knowledge of course 😁

Absolutely not true and noticed by myself, the nkon cells I had got a little "fatter" when they were just sitting uncompressed in a wood box, after only 1 year (but not like they come in a perfect shape when B grade anyway) but it is noticeable for sure.

The compression helps with making sure no extra gases get stuck in the cells, there is a video that Andy shared I think, and it only works if the cells are brand new as after the first few cycles the gas gets stuck in there for good. (so useless to do for B grade)

And yeah all the heat is not wasted, is heating up my insulated workshop/gym just fine especially these days 😁

The manufacturers clearly state compression is required on the spec sheet usually, it works without it of course but is just not optimal (only applies to new cells/A grade anyway)

I agree with the fact that most will replace them before that becomes an issue alright. The only other thing that swelling can do is put tension on the busbars/studs if they expand too much, even with the "flexible" bus bars so that comes under extra safety.

In my opinion and in the context of dynamic pricing, you would probably want to have around 1.5 to 2 times the nominal daily consumption in capacity. Others would say more. That sizing factor gives you flexibility to stretch beyond the 24hr period should there be an unforseen day where the units end up being high on average across the day. That's the mularky really - playing the system for what it's worth.

I have 13 panels at the moment and the roof is pretty full, its a new install on effectively a new build that we have just moved into, so perhaps the array numbers are actually incorrect. I have followed up with the installer to get the actual details.

When you said "depending on the inverter voltage" do you mean the specs or what its actually using in use?
Below are the specs, right now its at 417V for the one array (3 others unused)

The array sizing I shared above might be incorrect, for 13 panels, ballpark what would be expected?
Still waiting to hear back from installer on details (it was all managed through main contractor :( )

That all went through the main contractor and the M&E engineer, still waiting to get the actual details!

Too many middle-men! 🤣

Anyway, they must be 540w panels to get to 7kW.

Well I sincerely hope they did your NC6.

If they gave you a copy of that for your records, then you should have the kWp figure in it. Think you would need all paperwork to get the credit within a BER assessment