The POW-LVM5K-48V-N is a 5000W inverter made by PowMr. It supports 48V batteries and converts solar power into electricity. It includes a built-in 80A MPPT solar charge controller. You can use this inverter with solar panels, the grid, or batteries. It also has several settings that control how it works day and night.Pow-lvm5k-48v-n Not Using Battery at Night? Sol Setting Explained
Understanding the “Sol Setting” and How It Works
The “Sol setting” usually means the inverter gives priority to solar power. During the day, this works great. But at night, when there is no solar energy, the inverter might not switch to a battery. Instead, it may try to use grid power or just stop. That’s why it might seem like your battery is not being used at night.
Why the Inverter Doesn’t Use the Battery at Night
The inverter may not use the battery at night for one or more reasons. These could be:
- The wrong output mode selected
- Battery voltage is dropping too low.
- Firmware bugs
- ECO or power-saving mode set incorrectly
These reasons prevent the inverter from switching to the battery when solar energy is gone after sunset.
How Output Mode Affects Night-Time Battery Usage
The output mode decides how the inverter delivers power. If it’s set to “Solar&Mains”, it may use a grid instead of a battery. To use the battery at night, change the output mode to “Solar/Mains/Battery Priority”. This tells the inverter to try solar first, then battery, and use the grid only if needed.
The Role of Battery Cut-Off Voltage in Night-Time Power
Every inverter has a cut-off voltage setting. This is the minimum voltage needed for the inverter to use the battery. If your battery drops below this limit (for example, 44V), the inverter won’t use it. Sometimes, even when the battery shows 52V, the inverter still cuts off, which could be due to incorrect settings or weak batteries.
Common Firmware Issues That Impact Battery Usage
Some users have found that older firmware versions cause the inverter to ignore the battery at night. Problems include high grid usage, Error 29 (BusVoltLow), and long “waiting” periods where the battery isn’t used even though it’s charged. Updating the firmware may fix these issues.
Recommended Charging and Output Mode Settings
To make the inverter use battery at night, try these settings:
- Charging Mode: Hybrid or Mains/Solar Priority
- Output Mode: Solar/Mains/Battery Priority
- Cut-off Voltage: Around 44V
- Boost Voltage: 55V
- Float Voltage: 54V
These settings ensure the inverter uses solar first, then battery, and only then the grid.
How to Check and Adjust Battery Voltage Manually
To check your battery voltage, use a multimeter. Measure the battery voltage at night before the inverter cuts off. If it’s below the required level, the inverter will not use it. If the battery is healthy but still being ignored, double-check your settings and consider updating the firmware.
Firmware Updates: When and Why You Should Install Them
Go to the PowMr website and find the latest firmware for your inverter model. Follow the instructions to update safely. This can fix bugs that stop the battery from working at night. Always update your firmware if you face problems with switching between solar, battery, and grid.
Using ECO Mode and Power-Saving Settings Correctly
The ECO mode is meant to reduce battery power usage during light loads. But if not set correctly, it might stop the inverter from using the battery at night. You can adjust this in the settings (usually under Setting 22). Disabling ECO mode may help your inverter run better during the night.
Real User Cases: Problems and Their Fixes
Case 1:
A user reported 500W grid usage at night, even with a full battery. Fix: Changed output mode to Battery Priority and updated firmware.
Case 2:
Another user faced Error 29 at night with a 53.2V battery. Fix: Lowered cut-off voltage and updated to new firmware.
Case 3:
One user’s fridge turned off at night due to a “waiting” state. Fix: Changed charge settings and disabled ECO mode.
Step-by-Step Fix: Getting Your Battery Working Overnight
- Open the inverter settings panel or app.
- Set output mode to “Solar/Mains/Battery Priority.”
- Check and lower battery cut-off voltage (e.g., 44V).
- Make sure the battery voltage is above that level.
- Update the firmware if needed.
- Disable ECO mode if it causes low-load problems.
- Save changes and monitor the inverter at night.
Table: Common Settings and Their Effects
| Setting | What It Does | Recommended Value | Impact |
| Charging Mode | How battery get charged | Hybrid or Mains/Solar Priority | Ensures battery gets charged |
| Output Mode | Where the inverter pulls power from | Solar/Mains/Battery Priority | Enables battery use at night |
| Battery Cut-Off Voltage | Minimum voltage to use the battery | 44V | Prevents early shutdown |
| Boost Voltage | Fast charge level | 55V | Charge the battery fully |
| Float Voltage | Maintains battery after charge | 54V | Keeps battery healthy |
| ECO Mode (Setting 22) | Reduces idle power use | Disabled or properly configured | Helps avoid unnecessary shutdowns |
| Firmware Version | Software inside the inverter | The latest version from PowMr | Fixes bugs and improves switching |
Final Thoughts
If your POW-LVM5K-48V-N inverter isn’t using the battery at night, it’s likely due to settings, voltage issues, or outdated firmware. Follow the steps in this guide to solve the problem easily. With the correct setup, your inverter will smoothly switch from solar to battery at night, saving power and avoiding interruptions.Pow-lvm5k-48v-n Not Using Battery at Night? Sol Setting Explained with Fixes
FAQS
Why is my POW-LVM5K-48V-N inverter not using the battery at night?
This often happens when the inverter is set to “Only Solar” or “Solar Priority” mode. These settings stop the inverter from using the battery when there’s no sunlight. To fix this, switch the output mode to “Solar/Mains/Battery Priority.”
What is the best output mode to use the battery at night?
The best setting is “Solar/Mains/Battery Priority.” This ensures the inverter uses solar power first, then switches to battery at night, and only uses grid power if the battery is low or empty.
How do I check if my battery voltage is too low?
Use a multimeter to check the battery voltage directly. If the voltage is below the cut-off threshold (often around 44V), the inverter will stop using the battery. Make sure your battery is fully charged and in good health.
Can updating firmware fix nighttime battery usage problems?
Yes. Many users reported issues like Error 29 or high grid usage at night, which were fixed after a firmware update. Visit the PowMr website and follow the update guide for your inverter model.Pow-lvm5k-48v-n Not Using Battery at Night? Sol Setting Explained.
What does the ECO or power-saving mode do, and should I use it?
The ECO mode helps reduce power draw when the load is low. But in some cases, it can cause the inverter to ignore the battery at night. Try disabling it or adjusting its settings to avoid unexpected shutdowns or switching problems.
