Do not count connectors to infer MPPT trackers
In an inverter specification, MPPT and string-input counts may appear close together, but they describe different items. Before choosing the larger number, ask the supplier to identify the proposed model's tracking groups and string connections. Neither number directly states the maximum number of solar modules that can be installed.
Read a specification that separates the two
The April 2021 SMA Sunny Tripower CORE1 table lists independent MPPT inputs and strings per MPP input as 6 and 2 respectively. This example shows why tracker counts and strings per tracker must be read separately. It is not a model recommendation or confirmation of current project specifications. Obtain the exact model document and revision for the actual offer.
Connect roof areas to panel grouping
Give the designer the roof plan, orientation and known shading, then ask which panels are assigned to which MPPT and why. For example, two roof faces receiving sunlight at different times cannot be explained by the total module count alone. Request an understandable grouping overview, without treating an article illustration as an approved electrical drawing.
Check other limits alongside tracker counts
Even if the tracker count suits the grouping, the designer must still check voltage ranges, current and other conditions for the actual modules and inverter. Ask which items were checked and against which documents. Spare connectors do not establish that more modules can simply be added. Do not move wiring, connect modules or open equipment yourself to regroup the system.
Compare offers on a common basis
If two offers use different MPPT counts, request grouping plans and yield assumptions for the same roof from both suppliers. Ask which constraint the difference addresses and what costs it brings. More trackers alone do not prove higher bill savings or a need for them on every roof.
Keep the installed grouping plan
For a Kintury Energy project, request equipment model documents and a grouping plan updated to match the installation, along with group references in supported reports. If equipment models or module counts change during the work, have the responsible team review and update the documents. This provides a consistent starting point for maintenance and future expansion.
