The us retail giant wal-mart in recent years there has been a question that what led to a succession of roof is on fire? Now found the answer. More than 20 August, according to foreign media reports, according to wal-mart in New York state Supreme Court on Tuesday, bringing the latest documents show a faulty tesla solar panels led to at least 2012 to 2018, seven wal-mart stores to roof of fire. Currently, wal-mart formally charged tesla breach of contract, claiming the existence 'the negligence of the large-scale, systematic problem', and 'in the installation, use and maintenance of solar panels, failed to meet the rigorous industry standards'. According to the relevant documents in the United States more than 5000 wal-mart stores, more than 200 tesla was installed on the roof solar panels. , court documents show the first roof fire occurred in 2012, solar portal, a wal-mart store in long beach, California. Since then, the roof frequent fires, continued to fall 2018. In March 2018, is located in a fire at a wal-mart store, Ohio scene appear a large number of black smoke, cause the store closed eight days. According to the relevant documents, when the fire broke out near the roof of the natural gas pipeline, fortunately, pipeline unaffected, to avoid the catastrophic losses. In May 2018, is located in Denton, Maryland wal-mart roof caught fire again, the roof was destroyed. Eight days later, the fire broke out in California to print the first wal-mart the region fire again, a firefighter is due to excessive inhalation of smoke, fire extinguishing process and treatment. In succession after the accident, wal-mart said: 'it is obvious that if it is the correct design, installation, inspection and maintenance, solar panels are not spontaneous. 'According to the New York times reported that solar energy equipment, wal-mart besides tesla's compensation claims, require the other party immediately remove all wal-mart stores tesla solar panels. Tesla's representative is not reply to requests for comment press. Electric car brand tesla in the solar industry, from its 2016 acquisition of SolarCity. New York times said, after the acquisition, tesla has been working on the development of one-stop services, sale of solar technology products, batteries and electric cars. Although tesla's products are mainly for individual consumers, but according to the California association of solar energy and energy storage ( 加州太阳能和存储协会) Data, in California, solar energy, tesla closer to a third of the solar panels used in the residential area. The New York times noted that recent years tesla's share of the solar energy market is gradually decline, has gradually lose industry leading position. According to the submission of the tesla, tesla's energy and storage business from the first six months of 2018 7. 8. 4 billion dollars, fell to the same period this year 6. 9. 3 billion dollars, fell 12% year on year. Tesla has been trying to revive its solar business recently. On Sunday, tesla CEO elon musk issued a series of messages on twitter, announced that some U. S. customers can in the case of not sign the contract now rent the tesla's rooftop solar panel system, solar power network, every month need to pay the $50 fee ( Customers need to pay $65) of California 。 Equipment, solar energy