VTCBATT Powerwall ESS Energy Storage Battery Series has IP67 waterproof&dustproof case,which uses the best surface materails of thick bake paint steel.It has the best hardness,reliability,corrision resistance in the powerwall ESS market.All the powerwall ESS has the most innovative design in the market.VTCBATT Powerwall ESS Lifepo4 battery is the perfect home energy storage wall-mounted. LiFePO4 Battery has the characteristics of small floor space, light weight, convenient installation, less calorie-generating and long cycle life.