Battery replacement safety
| Check |
Action |
Stop |
| Qualified work |
Battery removal and maintenance must be done by qualified personnel. |
Stop if you are not qualified for battery work. |
| Loads off |
Turn off all loads and accessories connected to the battery. |
Stop if a load cannot be turned off. |
| Terminal order |
On a grounded-negative system, remove the negative terminal first; if grounded positive, remove positive first. |
Stop if the grounding polarity is unknown. |
| Tools |
Use insulated tools only. |
Stop if only uninsulated tools are available. |
| Battery condition |
Do not charge a frozen battery; inspect terminals for corrosion and handle acid with soap and water. |
Stop on a frozen, swollen, or leaking battery. |
This is a safe-removal decision, not a test of battery capacity or charging system. Use a qualified technician for diagnosis.
Battery install checks
| Check |
Action |
Stop |
| System voltage |
Connect only a 12-volt battery or battery system. |
Stop if the system voltage is not 12V. |
| Lithium BMS |
For lithium-ion, use a pack with a certified Battery Management System. |
Stop if the pack has no BMS. |
| Tools and loads |
Use insulated tools and turn off all loads during terminal work. |
Stop if a load cannot be turned off. |
| Terminal order |
On grounded-negative, connect positive first and negative last; reverse for grounded-positive. |
Stop if grounding polarity is unknown. |
| Battery condition |
Do not install or charge a frozen battery. |
Stop on a frozen or damaged battery. |
Battery diagnose checks
| Check |
Meaning |
Stop |
| 12V system |
Confirm the battery system is 12 volts. |
Stop if voltage is wrong. |
| Lithium BMS |
A lithium pack without a certified BMS is incompatible. |
Stop and replace the pack. |
| Charger compatibility |
Do not use a transformerless charger with the inverter/charger. |
Stop if that is the only charger. |
| Frozen battery |
Never charge a frozen battery. |
Stop until thawed and checked. |
| Terminals |
Check for corrosion and handle acid with soap and water precautions. |
Stop if acid damage is present. |
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