Disadvantage of the Off-Grid system is probably the price of the battery. Because if it is a large system that will use electricity at night from the battery entirely, it must be designed to have a large battery capacity. This will also increase the installation costs in this section. Address: 4345 (Bhiraj Tower at Bitec) Sukhumvit Rd, Khwaeng Bang Na, Khet Bang Na, Krung Thep Maha Nakhon, 10260, Thailand Phone: 064-249-8962 | 097-159-5926 Email: doublejgd@gmail.com Social Profile: https://www.facebook.com/J2GD.ENERGY https://www.youtube.com/channel/UCK2D25Lcqwmd9uqKvMMke6w https://line.me/ti/p/~@j2gd