Computer inverter to make an emergency home lighting

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Christophe
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Re: Computer inverter for home lighting backup




by Christophe » 11/12/22, 10:44

Macro wrote:Well... The charger part of your inverter is out of order.... And that's why the batteries of the inverter were too...


Not sure: a 48V lead battery charger charges at 4*13.5 V = 54V min and 58 V if it charges at 14.5V per battery...

My MGE inverter that I tweaked a bit was at 13.5V.

A NiMh charger charges between 40 * 1.45 = 58 V and 60V but I don't even know if it has a 40 config... as we don't always understand phil's explanations well (I wonder if it's not wanted by time... : Mrgreen: )

Measure no-load and load voltages...
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phil59
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Re: Computer inverter for home lighting backup




by phil59 » 11/12/22, 11:32

Message on page 1 of June 21.
sicetaitsimple wrote:OK, I understand better: what you want to do is no longer send your surplus free of charge to the network. I forget about securing the lighting at night, if today you are not affected by frequent cuts there is little risk that this will fundamentally change tomorrow, and not sure that an inverter + batteries islanded on a specific circuit does not cause more problems than the good old network.



Like what, you see, that can change! And at that time, indeed, there was no concern, but it is always better to plan ahead!
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:
phil59
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Re: Computer inverter for home lighting backup




by phil59 » 11/12/22, 11:55

20221211_113939.jpg


20221211_113921.jpg


20221211_113851.jpg


20221211_113826.jpg


This is what these 40 NiMh, 1.2V, 13Ah cells look like.
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:
Christophe
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Re: Computer inverter for home lighting backup




by Christophe » 11/12/22, 12:34

Ah yes it's well packaged... do the test with the charging voltages to start...
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phil59
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Re: Computer inverter for home lighting backup




by phil59 » 14/12/22, 17:01

So, I put the inverter into service, we'll see what the load does next.

Currently, I have connected half of the lighting in the kitchen, the worktop, and its 6 7W spotlights.
Not the 3 19W lamps, so half saved.

The downstairs bathroom, the 2 mirror sconces 9W+9W, the 2 7W spotlights, the shower light, 7W, and the toilets 7W.
As I did at the time, I only have one cable that goes into the SB, at the lighting level.

I have 2 of the 3 chandeliers downstairs, 3*5W, and 5*5W.

So for now, we'll say 150W max at a time.

There I "hacked" in the table, but I will redo a small table on the side for what will be wavy.

On the other hand, I plugged in my old "thingy" reader of Watts, Volt, etc., and when empty, it goes to 50W, goes down to 1, and goes back to 0 .... with nothing in consumption on it, weird, I I'll see tomorrow, my "back" is stewed.

Tomorrow, I hope to bring the corrugated to the attic, I had spent more than 6mm2, a pair in 1.5, or 2.5, just in case, and redo a distribution of the rooms, and go down again to take the box, in the living room .... I have a lot of cable that goes through the attic, which distributes the first, and a small part of the ground floor, it was easier to redo, like that.



The old 12V battery of the small inverter has given up the ghost, and for the moment, only an inverter battery inside to save the stove circulator, and the boiler, so not very long, probably 15 minutes ....
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:
phil59
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Re: Computer inverter for home lighting backup




by phil59 » 14/12/22, 23:02

The test did not last very long, the batteries at the start were only less than 51-52V.

I will see tomorrow, after full charge.
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:
phil59
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Re: Computer inverter for home lighting backup




by phil59 » 17/12/22, 18:40

The inverter does not charge my batteries at all, and even discharges them, they went from 51V to 49V, in about 2 days, while the inverter is plugged into juice.

Impedance of incompatible batteries? inverter out of load?

I will soon recover 12V 175Ah, lead, there I would do a test.

What I know is that in 48 hours, I ate 1 kWh, for all this lighting, and when I have my future batteries, if the inverter charges well, I will soon have 8 kWh of storage, and in fact at least 2-4 kWh available, without too much damage to these batteries, batteries changed as a preventive measure.
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:
phil59
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Re: Computer inverter for home lighting backup




by phil59 » 05/01/23, 17:23

So I recovered 4 12V batteries, which had different lives, and of different intensities.

It's cool to have recovered for free, but as cool for the use to make 48V ....

2 Times 225Ah
1 x 180Ah
and 170Ah.

They are all still in the 12.3V, see a little more.

For now, I have not been able to move them, too heavy for me!

I will have to do some tests one by one, we will say that if I put in series, it will be at best on the weakest, in 170 Ah.

We will say that I could probably count on 150 Ah, at 48V, or about 7 kWh, with a little more than 3 kWh that can be used.

I wonder how in practice all this will mix, correctly or not, and how it will be able to load correctly....

It is for troubleshooting, and to improve the red day of the EDF tempo tariff.
0 x
hmmmmm, hmmmmmmmmmmmmm, hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhmmmmmmmmm, huh, hmmmmmmmmmmmmm.

: Oops: : Cry: :( : Shock:

 


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