Which type of solar photovoltaic power generation system is most suitable for household use?
Release time:
2025-09-04
That is to say, under the premise of proper use and maintenance, it can basically achieve a return on investment in about 5 - 6 years. And according to the service life of the equipment, it can basically be guaranteed for about 25 years, which means the pure profit - making cycle is about 20 years. It's quite cost - effective.
Part 1: What's the Appropriate Configuration of Solar Photovoltaic Power Generation System for Ordinary Households?
Considering both the demand from users and the supply from manufacturers, a general configuration of 10KW is usually sufficient. However, household electricity consumption is not static. Therefore, if you decide to install a household photovoltaic power station system, it's best to choose a "modular" product. This allows for more flexible selection and configuration of the entire system, and also facilitates installation and maintenance.
At present, a few brands on the market have developed such flexible and expandable modular household photovoltaic power station system products. For example, the Lenercom Power Storage Treasure. It can orderly stack 1 - 9 battery modules according to users' different power demand at different stages. Each battery module can store 5.12kWh of electricity, with a cycle life of more than 10,000 times, ensuring a service life of over 10 years.
But before installation, you must pay attention to one point: obtaining the construction and installation permit. Although according to relevant national laws and regulations, household photovoltaic power generation systems are not illegal constructions. As long as you submit an application through legal channels, design and build the photovoltaic power station reasonably, the State Grid will connect it to the grid and distribute subsidies on time.
However, in actual operation, you still need to get the consent of your local property management. Especially for residents of commercial housing, since it will inevitably occupy the rooftop space, you also need to obtain the consent of other residents in the same building. Otherwise, disputes may easily arise, which can be quite troublesome to handle.
Part 2: How Long Does It Take to Recoup the Investment for Installing a Household Photovoltaic Power Station System?
How long it takes to recoup the investment depends on the cost of the products you purchase. Therefore, we can only preliminarily establish a model for calculation, which is for reference only.
Let's make a conservative estimate based on a 10KW household photovoltaic power station system. Assuming a medium - level initial investment cost of 100,000 yuan, with the power grid's on - grid price of 0.39 yuan per watt - hour and a cost of 30,000 yuan.
The annual power generation of a 10KW system = 10,000W × 4H (average sunshine time) × 360 days = 14,400 kWh per year
The electricity recovery price from the power grid = 14,400 kWh × 0.39 yuan/kWh = 5,616 yuan
Then, the annualized return on investment = 5,616 ÷ 30,000 = 19%
That is to say, under the premise of proper use and maintenance, it can basically achieve a return on investment in about 5 - 6 years. And according to the service life of the equipment, it can basically be guaranteed for about 25 years, which means the pure profit - making cycle is about 20 years. It's quite cost - effective.
