Before we get started with generating single line diagram, ensure that you already have created the design, added solar PV modules and inverter in your design. It's preferred that you have already added all the strings. It's always recommended that you create string and then switch to Single line diagram, as this will give you an accurate result of whatever you have created in design studio the same would get reflected into your single line diagram.
Let's start with single line diagram.
Step 1. Ensure that your latest updated design is saved. After saving the design then click on the view tool on the left tool bar and select the single line diagram. You can also double tap 4 on your keyboard to directly go to the SLD view.
Step 2. The line diagram will slightly vary based on the type of inverter we choose i.e. Micro inverter, string inverter, hybrid inverter or central inverter.
2.1. If we have added string inverter then, an array of modules will be connected to form strings and then the string will get added to inverters. The central inverter will have similar configuration as string inverter.
2.2. The hybrid inverter will also have similar settings except that a battery will also get added to it.
2.3. If we have added micro inverter then each modules will be connected to it's respective micro inverter.
Step 3. In this line diagram each module is connected to micro inverter. Based on maximum branch length of micro inverter, the micro inverters are connected into branches.
Step 4. All the branches then get's connected to junction box.
Step 5. After junction box, the conductors get's added into load center in which we have the flexibility to change it's breaker size. So in our case we have by default taken 15 ampere but if it's required we can update it. Note, load center will only be present if we have no. of AC conductors more than 4. If Enphase micro inverter is added in your design then Envoy-Monitoring unit(IQ Gateway) will also get added in the line diagram.
Step 6. Production meter connection can be changed based on how your main connection is i.e. depending on whether it's load side or it's line side or it's a normal connection. You can change it according to the way your customer's house is designed.
Step 7. There are two types of AC disconnect that we have in our software that is fused AC disconnect and non-fused AC disconnect, based on your project requirement you can change it accordingly. There are two more additional things like in case of AC disconnect you can choose how you want to add the AC disconnect. That is whether you want to have it after production meter or you want to have it prior, if you choose the option of 'AC-PM-AC' then you will see that we will have two AC disconnects.
After changing the connection the two AC disconnects gets updated, now the connection is production meter is in between two AC Disconnects.
Step 8. At the end of the circuit we have the main service panel. Under the main service panel dropdown we have a list of different wire configuration connected into the main service panel. We also have several other options available if you want to add other electrical components like sub panels or if you have different types of load connection. You can also add generator to your system. So based on whatever is your requirement you
can choose from the list of available electrical components.
Step 9. We also have option to view 3 line diagram. By clicking on the radio button of 3L you will be able to see the 3 line diagram. Under 3 line diagram you will be able to see the positive, negative and the neutral wire connections.
Step 10. You also have the option to export single line diagram to Auto CAD by downloading the DXF. file of single line diagram. To download Auto CAD layout click on export tool on the top menu bar and choose the option of export sld. A DXF. file will get downloaded. You can open that file in Auto CAD.
Note: If you want to change the wiring connection or update the number input and output conductors(wires) from one electrical component to another then, you will need to update the no. of current carrying conductors in wire size calculator first. Once your wire size calculator is updated with new sets of conductors, come back to design studio. Save the design and then view single line diagram. You'll be able to get the updated line diagram.