Inverter / micro inverter

Stringing starts with the inverter. You add the inverter first, then group the placed modules into strings and assign each string to one of the inverter's MPP trackers. Microinverters are the alternative: one small inverter per module, with no MPP-tracker grouping to manage. The full module-by-module stringing walkthrough lives on the Plan PV modules page. This page covers the inverter side.

Before you start

• Place your modules first. Strings are built from modules already on the roof, so if the roof is empty, go back to module placement.
• Know which inverter model you're using and how many MPP trackers it has. Inverters come from your components catalog.
• For a microinverter system, have the microinverter component selected. The flow is different (see Use microinverters instead below).

Add an inverter

1. Switch to Strings mode in the top toolbar.
2. In the sidebar, click Add Inverter.
3. Pick an inverter from your components catalog.
4. The inverter appears in the right sidebar with its MPP tracker slots empty. To name it (such as Main Inverter, South Roof), open the inverter's detail panel and edit the name there.

Assign strings to MPP trackers

Each inverter has one or more MPP (maximum-power-point) trackers. A tracker holds all the modules on its string at a single operating point, so a shaded or differently-angled panel drags the rest of the string down.

1. Create or select a string in the 3D scene.
2. In the inverter's panel, click an empty MPP tracker slot and drag the string into it.
3. Alternatively, open the string's detail panel and assign it to an inverter plus MPP tracker there.
4. Keep modules on the same string aligned in orientation and shading so the tracker isn't held back by one weak panel.

Note: If a string's current exceeds the inverter's limit, Reonic shows a warning inline on the affected MPP tracker so you can rebalance the string. Read the warning before you move on.

Use microinverters instead

Microinverters give every module its own inverter, so each panel runs at its own operating point with no MPP-tracker grouping.

1. In the components catalog, some inverter components are tagged as microinverters (one per module).
2. Add the microinverter component. It maps one-to-one to the modules you assign.
3. Place modules, then add microinverter assignments. There's no MPP-tracker structure to manage.
4. Check the component's specification to confirm whether it's a microinverter or a standard inverter before you wire.

Things to know

• The current-limit warning helps you rebalance. When a string's total current exceeds the inverter's limit, Reonic shows a warning inline on the affected MPP tracker. Read it, then rebalance the string to clear it.
• Inverter sizing. If you provision more module wattage than the inverter can handle, the simulation caps the output. Use the catalog inverter specs to size correctly.
• Hybrid inverters with integrated storage come from the components catalog. Pick the matching component and the storage is modelled with it.
• Wiring locks after signature, like the rest of the plan.

Related

• Plan PV modules places the modules and contains the detailed stringing walkthrough.
• Optimizers flag optimizers on shaded panels so they don't drag their string down.
• Plan the building draw the roof, upstream of placement.
• Circuit plan the AC-side schematic downstream of DC stringing.

Need help?

• Step-by-step questions about this flow contact your Reonic account manager.
• Feature requests or something missing drop a note to your account manager.
• Bug reports include a screenshot and the URL where it happened in your support email.

Last updated on August 4, 2026