Yes, it is possible to use the stored energy in a home battery during peak moments in the electrical grid. A well-designed home battery system can be programmed or configured to release the stored energy when the electricity demand in the household is high or when electricity rates are at their highest.

This process is known as "peak shaving." During periods of high electricity demand, such as peak hours, the home battery can supply energy to the household, reducing the need to draw electricity from the grid. This can lead to cost savings because electricity during peak hours is often more expensive.

Moreover, a home battery system can also be programmed to charge when demand and electricity prices are low. This allows the system to take advantage of cheaper electricity rates during off-peak hours, further optimizing overall costs.

The ability to use stored energy during peak moments depends on the capacity of the home battery, the energy needs of the household, and the programmability of the battery system. It is important that the battery system is adequately sized and configured to meet the specific needs of the household.