The strongest reserve for the doomsday

By the time everyone finished drinking this cup of tea, it was almost four o'clock in the afternoon when they started work together.

Looking at the tense and busy scene in and out of the yard and the house, I listened to the sound of various welding machines and cutting machines.

Who would have thought that 3 hours ago, it was still a rural silence.

After three hours, it was transformed into a modern construction site

with all kinds of building materials, all kinds of modern mechanical equipment, and 15 brothers working here.

Thinking of this, this is a bit of an admiration for my organizational skills. Haha, Wang Po sells melons and boasts.

Of course, organizational skills are required. But what is more important, and plays a more critical role, is money. Hehe,

Lao Wang's installation of this door is very simple, so I was too lazy to do any more manual work here, and ran to the side where the solar panels were installed.

They had already made deep holes in the ground in the yard, then lowered the stainless steel pillars and poured cement.

This cement sand and gravel concrete is waterproof and quick-drying, and it is estimated that it will be formed in half an hour, so waiting for the gap for the support column to form, the masters here began to build and weld the stainless steel bracket above.

I went to the truck to get the solar-powered batteries out of the truck.

This kind of battery capacity is 200A with a voltage of 12V, and I ordered 20 such batteries, which cost me a total of 40,000 yuan, except for the fat man buying cigarettes, which is also the largest expenditure.

But after all, electricity is very important, and it is worth spending a little more. Electricity in the apocalypse is worth more than buying that cigarette. I

climbed into the compartment and saw that the battery was about half a meter long, 30 centimeters high, and almost 30 centimeters wide.

I rolled up my sleeves and carried it, I wiped it, and found that this thing was at least 100 pounds...

It's not that I can't move 100 catties of things, if you give me 100 catties of RMB, I can not only move, but I can also run.

But this 100-pound battery, it's hard to say. I can barely move this though.

But when you get out of the car, you're afraid it's easy to break. To be on the safe side, I called the fat man.

"Fatty, come, come and help carry the battery, this thing TMD is too heavy"

The fat man was violently tearing down the door frame there, and when he heard me calling him, he put down his work, wiped the sweat on his palms, and came over.

"You bring the battery over first, I'll carry it underneath," the fat man looked at and told me to move the battery to the edge of the measurement first, and then he moved it to the ground.

It's obviously a lot easier, but 100 pounds is actually not easy, the kind of nylon elastic band, strangles my hands one by one.

The width of the living room is about 3 meters, the depth is about 6 meters, the length of this thing is half a meter, and the width and height are only 30cm,

so I plan to put this thing horizontally along the west wall, against the wall.

A set of 8 cells, divided into 2 layers of 4 each. Such a battery pack is 2 meters in length.

In this way, the two groups together are 4 meters long. And the length of the living room is 6 meters, so it is just right, and it is not very obstructive to put it on the side.

The battery rack sent by the solar cell company is made of stainless steel, and I looked at the four-layer structure

, so that the first and second layers are used for batteries, and the third layer is for the inverter and controller. On the fourth floor, you can place some sundries or other electrical equipment to increase the storage space.

There is also an overhead layer of about 5cm below the first layer of this shelf, which is estimated to prevent moisture or water from the ground from blistering on the battery.

So I took the shelf in, leaned against the west wall, and placed it.

At this time, two employees of the solar cell company also came over and carried the batteries to the shelves in the house with me.

Of course, they were pushed up by small carts, and only at the granite steps were forced to move up.

Nima, if you don't say it sooner, I moved several times in vain...

After a bit of tinkering, the batteries were finally moved to the shelves one by one. Two floors and one long row sit in rows against the west wall.

"Little babies, the power supply here will depend on you in the future"

The fat man bowed to these, and began to be superstitious again.

As for the wiring of these batteries and the wiring of the inverter and the wiring of the solar controller, I don't know much about it, so I will leave it to the professional electrician of the solar cell company to do it.

We watched from the sidelines, as if every boy was particularly interested in this kind of mechanical, or electronic, repair.

If I was a child, I would have been asked to go to the garage to see the motorcycle repaired, and I would have been given a small bench and I could watch it for a day.

If I were to watch the excavators digging in the river from the bridge, I could watch it for a day.

In this way, the fat man and I were like two 200-pound children, watching the electrician wiring and installation on the sidelines.

The inverter we bought is 48V 6000W, because the power is relatively large, so we chose the 48V one

, because 6000W If you still use 12V, then the current will be as high as 6000/12=500A

Since the power formula of the resistance is P=I²R, the power heat is proportional to the square of the current. Therefore, the current of 500A is too large, and no matter how thick the wire is, it will not be able to withstand such a large current, and it will inevitably heat up and catch fire in the end.

But if the voltage is upgraded to 48V, then the current is 6000/48=125A

A 50 square copper core wire can withstand 175A current, so that the wire connecting the battery and the inverter only needs to buy 50 square copper core.

One battery is 12V, and my side is a group of 8 batteries, a total of two groups of batteries, each group of batteries, including the inverter controller solar panel wiring are independent of each other, so that you can ensure that in case one of them breaks, the other can still hold on.

A set of 8 batteries, divided into upper and lower layers. Such a layer of 4 pcs., each 12V. Such a layer in series is just 48V.

The same is true for the upper layer, and then the two layers are connected in parallel, so that a 48V system is completed.

Then connect this to the solar controller, and then lead two more wires from the solar controller to the inverter. In addition, two wires are drawn from the solar controller to the solar panel for charging. That's all and you're done.

Solar controller, mainly to control charging and discharging.

The first is to prevent the charge from being too full and bursting.

The second is to prevent the battery from being damaged by too much discharge.

For these connecting wires, I asked the electrician to use the thickest 50 square copper wires, and we are not short of money.