How Charging Works In GridGap
The Charging tab shows how hard it will be to put energy back into the battery once the scenario has used it. This is where storage demand becomes a practical charger requirement and a realistic recharge time.
What the Charging tab is doing
A battery system is only half the story if it cannot be restored in a sensible way. The Charging tab turns the battery burden into a recharge problem and then estimates what charger size is needed to solve that problem inside the available charge window.
This is why charging results often feel more practical than theoretical. A battery can look fine in stored-energy terms and still be awkward to live with if it takes too long to recharge under the scenario assumptions.
Energy to replace
The first key card is Energy to replace. This shows the battery energy that must be put back after the scenario run. It acts as a bridge metric between the battery result, the charging result, and in hybrid cases the solar result as well.
If this number is high, the charging system has more work to do. If it is modest, the charging side may remain quite manageable even with a smaller charger and a shorter charging window.
Minimum and recommended charger size
The tab then shows Grid charge hours and Charger efficiency. These two values frame the charging problem. Grid charge hours tell the app how much time is available. Charger efficiency tells the app how much of the incoming charging power actually reaches the battery.
From there, GridGap gives you both minimum and recommended charger sizes: Minimum charger W, Minimum charger A, Recommended charger W, and Recommended charger A.
The minimum values are the lower technical boundary under the current assumptions. The recommended values are the more practical planning answer. They are the better place to start when comparing real hardware because they reflect a more comfortable path to getting the battery restored in time.
If the recommended charger feels much larger than expected, look back at the energy to replace, the available charge hours, and the charger efficiency. Those are usually the drivers.
Recharge time and charging window
The final key card is Grid recharge time. This tells you how long the recharge is expected to take under the current assumptions.
Read this directly against Grid charge hours. If recharge time is comfortably shorter than the available window, the charging side is usually in a healthy place. If recharge time is close to the available window, the system may still work but with less breathing room. If recharge time runs longer than the available window, the scenario is telling you the recharge plan needs attention.
For RV and boat-style use, many users treat this as shore-power charging time. The logic is the same. The question is simply whether the battery can be restored in the time the system realistically has available.