Place emphasis on the development of nuclear power, thermal power and coal gas, after the tsunami and the nuclear power plant Fukushima in 2011, the Government of Japan has shifted to renewable energy development.

Lesson success of photovoltaic roof Seen from Japan
Prior to the incident in Fukushima, Japan did not focus on developing renewable energy. The share of renewable energy (including hydroelectricity) only increased from 3.5% in 1990 to 4.6% in 2002. Until 1999, Japan only used solar energy to generate electricity. capacity of 209 MW. During this period, Japan focused on developing nuclear power, natural gas energy and coal thermal power, reducing oil use due to expensive oil prices.

However, after the Fukushima incident, Japan was forced to change its nuclear power development strategy to switch to renewable energy. To attract capital to invest in this field, especially solar energy, the Japanese Government committed to a stable electricity purchase price for 10 years at 44 Yen / kWh (equivalent to 44 cents / kWh), the The highest price in the world at that time. As a result, the installed capacity of solar energy increased sharply, from 5,000 MW in 2011 to 25,000 MW in 2014. In particular, rooftop solar power system developed very fast (accounting for 82.7% of total solar power capacity. heaven), while commercial solar energy projects only account for 17.3%.

While commercial solar power projects face some particular difficulties, the policy on renewable energy development has really stimulated investors to invest capital in rooftop solar power systems. This system overcomes the limitations of large solar projects such as reducing land rent, no need to sign power consumption contracts with local power companies …

Lesson success of photovoltaic roof Seen from Japan


The development of roof-mounted solar power systems has facilitated the supply of electricity to each consumer household. This model also gradually changes the structure of the distribution grid in Japan in the direction of ensuring the connection of small power sources, each household is both a consumer and a generating unit

As for large capacity solar power projects, although expected a lot, it was not very successful, due to the Government’s policy change in supporting renewable energy sources; due to difficulties in site clearance compensation and conversion of agricultural land into industrial land. In addition, it is difficult for large-capacity solar projects to sign power supply contracts with four Japanese power companies, because this source of energy is highly unstable, when being connected to the grid, it will reduce System stability: The goal of Japan is that by 2030 solar power will account for 12% of the total power capacity.

Affordable Japanese buy ‘wrong’? The answer is not so, the Japanese understand that instead of spending tens of billions of dollars to rebuild Fukushima they use part of the money to encourage people. Vietnam is also facing the risk of electricity shortage, but instead of being like Japan, it seems we are doing the opposite.

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