Computer inverter to make an emergency home lighting

[sicetaitsimple]

What's the graph? Consumption imported "EDF" during the day?

[phil59]

My conso enedis ....

[phil59]

And on 12/06/2022

12062022.PNG (61.62 KIO) Accessed 1152 times

Still not there....

[sicetaitsimple]

My conso enedis ....

It's almost "perfect"! The daytime "EDF" consumption is almost erased.

But it's June 11 or 12, two days you're away. Inevitably, it will be different in other months and/or when you are present. But I would say that your project to double the PV surface to go to 1500Wp makes sense, even if it causes some additional surpluses in summer.

[phil59]

And here is yesterday, where the little girls were sick, so at least one TV "on" almost all day, the car that has finished recovering from the weekend, so it's about 2 kW....

21062022.PNG (64.05 KIO) Accessed 1140 times

And yesterday, at my house, a very average day, less than 2 kWh of production.

To put it in perspective, in the morning, the boiler wood stove worked for 2-3 hours, in very light, just enough to bring back 1-2° more to be comfortable.

Some peaks, I see, induction hob, oven, but others, I don't know or I haven't made the connection yet .... although my wife has put a washing machine, the dishwasher, but directly on hot water, so a little less juice, and, unfortunately, a dryer for a few minutes ....

[phil59]

It's still funny, that over ten days, only answers on the substance, and still limited to not many people, but not on the form...

Ce forum Is it starting to be less frequented, with people having technical skills and daring to publish them?

Well, where I am with this inverter ...

Two of the batteries exceeded 12V, and keep them on for at least 4-5 days (not testing any longer, and not trying to push them much further) plus the one I had, which is ok.

The others, more of the old ones I had, don't retain better than 10V, and when I put 3ok, and one at 10V, not good for the inverter...

I received my BMS 3S yesterday, which I had ordered....

Haven't had time to go up yet, to do a test.

I have at least 12 18650 batteries, which still retain at least 1000 mAh, so 48Wh max output to test...

So, with 3 batteries ok, I'm thinking of making one in 18650 at 6Ah ....

I hope it all mixes well...

I have well over 100 18650s, after testing half of them on Friday I have 47 at over 3V, so no problem for her, 2 at 2.4V average, and one at 1.7V, so hs, more some that I had marked hs, a while ago... (usually, when I replace them at work, I try to have them at about 50% charge, in order to keep them).

In fact I would need almost 200 ok, to start doing some good.

Then I have the solution to put car batteries, but not the same at all, and it's not the best, not intended for slow discharge...

[sicetaitsimple]

This is the whole question of the "second life" of batteries
In a stationary and domestic application, with a capacity of a few kWh and around 2 to 3 kW, we say to ourselves that even "worn out" it should hold up to the few tens of kW required by an electric vehicle;
Obviously it seems a little more complicated than that... In any case, we see fewer articles on the subject than a few years ago.

[phil59]

I was talking about thermal battery, because if I could recover EV batteries for cheap, I would take immediately ....

It is necessary to count that at the end of life, we would have about 50-70% of their initial autonomy, for the "lithium".

But it is especially, when you start to have several "unbalanced" cells that the pb start to arrive.

There, do not hang around like that, an HS, can plant you all, a little less good can make that even with 10% of autonomies, the car stops ....

No 15-20 year old lithium cars on the market yet to be able to hope to recover a little ... but recovery is becoming more and more complicated.
The system "manages" in 10 years, what will it be?

[sicetaitsimple]

No 15-20 year old lithium cars on the market yet to be able to hope to recover a little ... but recovery is becoming more and more complicated.
The system "manages" in 10 years, what will it be?

I wasn't really thinking of "resourcefulness", but of a well-structured industrial system that would recycle end-of-life EV batteries into stationary batteries, with acceptable performance for this stationary use, much less "demanding" than a EV use.

[phil59]

I believe this is already underway, or at least planned.

Some have already recovered batteries from 106, clio, ax, etc., but it's piecemeal.