1. Firstly, the packaging of the battery should be checked for damage, and then the packaging should be carefully opened to check whether the batteries are in
good condition one by one; And check the factory date of the battery to determine the time when the battery needs to be recharged when it is put into operation.

2. Due to the high voltage of the battery pack, insulated tools and gloves should be worn during installation to prevent electric shock.

3. Batteries should be installed away from heat sources and potential sparks (greater than 2 meters), such as transformers, power switches, and fuses.

4. In order to facilitate battery heat dissipation, the distance between batteries should be at least 20mm. Before connecting the battery, the surface of
the wiring terminals should be wiped with a copper wire brush or emery cloth until a metallic luster appears.

5. The connection between batteries must have correct polarity and be firmly connected. After the battery pack is connected, connect the positive and
negative poles of the battery pack to the positive and negative poles of the charging device, and ensure that they are firmly connected. Then apply a layer
of Vaseline to the connection area for protection.

6. To extend the service life of the battery pack, high-quality automatic current limiting and constant voltage charging equipment should be used. Within
the range of 0-100% load change, the charging equipment should achieve a voltage stabilization accuracy of 1%.

7. In order to prevent the temperature rise of the battery from reducing its lifespan and prevent the accumulation of hydrogen gas inside the battery from
potentially exploding, the location where the battery is installed must be well ventilated. If possible, the battery should be installed in an air-conditioned room
with a constant temperature of around 20 ℃. According to research institutions, it is expected that by 2023, over 55% of energy storage systems will be deployed
alongside solar power generation facilities. With the expansion and development of the market, its system architecture will become an important consideration for
developing solar+energy storage projects.

According to the latest survey report by research company WoodMackenziePower&Renewables, the application of DC coupled solar energy+energy storage projects
on the grid side is becoming increasingly common and may dominate the residential market. In addition, although the eligibility for federal investment tax credits in
the United States is a factor in the growing share of DC coupled grid side solar+energy storage systems, even if the investment tax credit (ITC) gradually decreases in
2021, its share is expected to continue to grow.

This growth is also due to the new changes brought about by the DC coupled system architecture, which has made DC coupled solar+energy storage projects the first
to become grid side applications and receive more attention. Typically, user side (BTM) DC coupled systems use multi port hybrid inverters related to battery storage
systems and solar power generation assets. Although these inverters are suitable for user side (BTM) battery energy storage projects, they are not suitable for grid
side (FTM) battery energy storage projects.

The new changes in the DC architecture of the FTM battery energy storage project involve independent DC-DC converters connected to the battery. These new grid
side (FTM) DC coupled systems typically have lower interconnection costs than AC coupled systems, as they only rely on a single interconnection point. Interconnection
costs will significantly affect the capital expenditure of project developers (depending on the size of the system, interconnection costs may account for 20% to 35% of the
system's balanced cost stack).

In this DC coupled system