1. Name of the Device the battery is installed in.
2. Power status range.
3. Battery capacity.
4. Battery life or charging time.
Why does my battery’s state of charge (SoC) never go all the way down to 0%? Is something wrong?
Nothing is wrong — this is intentional and helps protect your battery.
Emaldo systems use several reserve and protection levels to balance usable energy, backup power availability, and long-term battery health. Because of these protections, the battery will normally stop discharging before reaching 0%.
Battery systems maintain a reserve for several important reasons:
- Protect battery lifespan
Fully discharging lithium batteries places additional stress on the cells and can accelerate battery degradation. Maintaining a reserve helps preserve battery health and capacity over time. - Prevent deep-discharge damage
Lithium batteries have safe operating voltage limits. Allowing the battery to discharge too deeply can cause permanent damage and may affect its ability to recharge properly. - Keep the system operational
The battery and inverter require a small amount of power to operate monitoring systems, safety functions, and restart procedures. A reserve ensures these critical functions remain available. - Improve reliability and safety
Factors such as temperature, battery age, and sudden changes in power demand can affect battery performance. Maintaining a reserve helps the system manage these conditions safely and reliably.
Emaldo reserve and protection levels
Emergency Reserve (user configurable )
A portion of the battery is reserved for backup power during a grid outage. The system will charge the battery as much as possible to build and maintain this reserve, except during periods of very high electricity prices.
Low Battery Warning (not configurable - set to 5%)
When the battery reaches the Low Battery Warning level, emergency charging will begin when the system is connected to the grid. During a grid outage, the battery can still continue discharging to supply the home’s loads.
Battery Protection (not configurable - set to 2%)
When the battery reaches the Battery Protection level, emergency charging will begin when the system is connected to the grid. The inverter output will be disabled, stopping power supply to connected loads, in order to protect the battery from deep discharge.
Why you might sometimes see SoC drop below the configured reserve
In some situations, the SoC may fall below the configured Emergency Reserve and, in rare circumstances, the reported SoC may approach or briefly reach 0%. This does not normally indicate a fault. The battery includes built-in protection mechanisms that help prevent deep-discharge damage and protect long-term battery health.
Examples include:
- Cold weather and battery heating
At low temperatures, the battery heating system may consume energy to keep the battery within its safe operating range. - Battery system self-consumption
The battery and inverter require a small amount of energy for monitoring, communication, and safety functions. If the battery remains near the reserve level for an extended period without sufficient charging, this consumption can gradually reduce the SoC. - Peak shaving configured too aggressively
If the peak shaving threshold is set too low, the system may discharge further than expected in order to support the configured load profile.
Bottom line
It is normal for the battery not to reach 0% SoC. The reserve and protection levels are designed to preserve backup power availability, protect battery health, and ensure reliable system operation.