Grid-tie solar electric systems can be connected to the utility grid via a bidirectional meter. The meter will register the electricity consumed in your house as well as the nervy produced by your solar system. Packages in this section are composed of solar panels and inverters. The solar panels generate the electricity while the inverter converts the energy generated by the panels and makes it compatible with the grid. The number of solar panels determines the size of the system. For example, a solar system made of 12 solar panels of 250W each, is a system with a total capacity of 3000W (Watt) or 3kW (Kilowatt). This is also known as DC capacity or DC system size. Complete grid-tie solar kits in this section include solar panels and the inverter suitable to ensure best system performance. Each system has been evaluated by our engineers to confirm the compatibility of the equipment and ensure optimum production. Packages do not include mounting structures and accessories such as junction boxes. The reason we have not included these components is that each installation is different and we only included the items that will be required in all cases. For each system we will make sure that the end user is aware of the additional components that might be needed for their specific project. Some packages include central inverters, other packages are composed of solar panels and micro inverters. Systems with central inverters are more cost-effective when you consider the cost per Watt installed. Microinverter systems offer much more flexibility in terms of shading, orientation and location of the solar panels. In this section, only systems with microinverters include monitoring equipment. Systems with central inverters also can be remotely monitored; however, the monitoring equipment is sold separately as an accessory.