There are two interrelated upgrades which may be necessary when installing a new residential solar electric system. As net metering laws and rules for energy buyback by utility companies expand, many residents with solar electric systems are looking forward to actually making a little money off their investment. Therefore, many upgrade to a more powerful inverter just in case they want to take advantage of likely incentives in the future.

A stronger inverter can add significant cost increases, not only for the beefier inverter, but for a possible utility service upgrade. On the breaker panel it will list a maximum AC flow in amps (100, 200 max AC, etc.). The inverter for a new solar electric system will plug right into this panel, and the system can send quite a bit of flow through the inverter. In a case where the maximum AC is breached, then you may need a service upgrade from the utility to handle the extra current.

A utility service upgrade can be a complicated process with many steps that will need to be followed carefully to prevent confusion and extended time with your power shut off. First the utility company may want to inspect your meter to determine that it is in the correct or an adequate spot. You may also need a building permit or other contact with the city, you may need to coordinate with all parties involved to get the job done quickly to prevent prolonged grid disconnection. There will most likely be fees involved also.

For a residential service upgrade it should cost somewhere between $400-600, depending on where you live. However, there may be benefits or rebates if a solar electric system is involved. Utility companies are coming round to solar because it saves them time and money also. Have a solar contractor give you a consultation on a system that can get you started. A solar contractor based in your area will have a solid grasp of local incentives and be familiar with your utility company, too.