How Solar Controller Results Work
The Solar Controller tab separates the controller question from the wider array question. The Solar tab tells you how much solar the scenario needs. The Solar Controller tab tells you what that means for the MPPT or controller side.
What the Solar Controller tab is doing
In a hybrid result, it is possible for the panel count to look reasonable while the controller side still looks demanding. That is why GridGap gives the controller its own tab instead of burying those values inside the solar summary.
This tab stays compact, but it is important. It helps you judge whether the solar array implied by the result still fits within a sensible controller envelope.
MPPT PV input values
The first two cards are Minimum MPPT PV input and Recommended MPPT PV input. These describe the PV input power the controller is expected to handle.
The minimum value is the lower technical threshold under the current assumptions. The recommended value is the more practical planning answer. As with the inverter and charger results, the recommended value is usually the safer starting point when comparing real hardware.
If the array result feels comfortable but the recommended MPPT PV input feels high, the app is telling you that the controller side may need more care than the raw panel count suggests.
MPPT charge current values
The other two cards are Minimum MPPT charge current and Recommended MPPT charge current. These describe the controller output side in current terms, which is often how real MPPT and controller products are compared in practice.
This is useful because a controller has to do more than survive the panel side. It also has to deliver suitable charging current into the battery system. A controller that looks acceptable on PV input power alone may still be a weak match if the charge-current side is too tight.
How to use the result
Read this tab together with the Solar tab, not instead of it. The Solar tab tells you what the array is trying to achieve. The Solar Controller tab tells you what the controller must be able to support for that array to work sensibly.
This tab also becomes especially useful when you move into Equipment Check. If you already have a real controller or MPPT in mind, these values give you the reference points for comparing it against the current scenario result.