Module & Inverter Engineering

These two sections, labeled DC engineering and AC engineering respectively, allow you to modify the different settings listed below:

DC Engineering

DC engineering is where you set the allowable range of modules per string using the min and max modules per string values.

It also allows you to set either the NEC 690.12 (Rapid Shutdown) requirements for rooftops or enable DC combiner box for ground mounts.

Rooftop DC Engineering

For rooftops we allow for three different configurations to comply with the NEC 690.12 Rapid Shutdown requirements:

• Optimizer: When selected you can enter the name of the optimizer.
• NEC 690.12(B)(2)(1): When selected, we assume that your system's racking and inverters comply with the UL exemption for rapid shutdown.
• Microinverter: When selected, we assume your inverter is a microinverter and responsible for rapid shutdown compliance.

Canopy DC Engineering

Canopies have no additional DC engineering settings, as they require neither combiner boxes nor rapid shutdown compliance.

Ground DC Engineering

Ground mount systems have the ability to use Combiner boxes (CBs) in the field. These combiner boxes can be sized on both the box and the string fuse level. When combiner boxes are enabled, you have the option to add an inverter DC disconnect for that inverter as well.

For Central Inverters, CBs are required. When there are centrals, the min, target, and max strings/CB are listed under the DC engineering.

AC Engineering

AC engineering is where you edit the inverter settings, including the inverter MPPT count and the minimum, target, and maximum strings per inverter.

For ground mount systems, there is an option to designate the inverter as a central inverter. Any ground mount inverter with multiple MPPTs is considered a central inverter. When a central inverter is enabled, you can set the number of combiners for that central.