AC side and point of common coupling

What this is for

The run from the inverters to the network. Opt-in, and design-level: one installation meets the grid exactly once, however many zones sit behind it. Leave the AC conductor blank and the condition set's flat AC loss covers it instead - which is the right answer for a short run and the wrong one for a warehouse with a hundred metres to the board.

Nothing on the canvas says where the installation meets the network until you place it. Without that point, no AC run can be measured.

Steps

1. On a wiring zone, open AC side. Choosing an AC home run conductor opts that zone in. The Grid connection block then appears above the zone list: Place it or Move it for the point of common coupling. Interconnect voltage (V) follows the Supply voltage on the project's Grid connection card; type a figure only where this installation's own connection runs at something else, not what a grid code says.
2. Inverter output (V) on the zone reads the chosen inverter's published AC voltage, and the runs are measured at it. Type a figure only where this installation differs. Where the datasheet states none, the box says so, and that is the one case it needs typing.
3. If inverters gather onto a board, set AC panel inputs on the zone (zero means they reach the connection directly) and choose the Panel to grid conductor. Boards are counted as inverters over inputs, rounded up, and filled evenly; where zones state different inputs, the smallest governs. Once the connection point is placed, the block shows how many boards the layout implied and offers Place AC panel for each. An unplaced board estimates from the connection point.
4. A transformer is inferred only where two stated voltages differ - yours, the inverter's datasheet or the project's connection. A voltage nothing states never conjures one. It is on the bill of materials and on the single-line; its efficiency is not modelled, so no loss is applied for it. It carries the two voltages and never a kilovolt-ampere rating.
5. On the outputs page, a diagram that stops at the inverter with no PCC placed tells you the board, the metering and the network connection have nothing to draw from. Set them on this rail rather than treating the truncated drawing as the product's limit.
6. Export limiter fitted, under Grid connection at the foot of the pane, is design-level and read by compliance. Switching it on starts at 0 kW. No limiter and a limiter set to zero are different answers: nothing caps export, versus a limiter commissioned to refuse it.

Until a zone opts in, no AC run is generated, the condition set's flat AC loss stands in for the cable, and the single-line stops at the inverters.

Tips and common mistakes

• Do not hang the grid point off a wiring zone. Two zones on two inverter models still connect once.
• An unplaced inverter is never estimated from the PCC, which would report zero metres of DC cable. The estimate is from the array centre until you place the inverter.
• The storage bank is part of the wiring. Where a battery is fitted, Storage bank on this rail places it and takes its Battery conductor, AC opt-in or not. An unplaced bank is still listed and drawn but gets no run, rather than a run of zero length.

Related

• Wiring zones
• Electrical outputs
• Generate wiring
• Grid-code compliance