It’s well known that when Lithium batteries go into a protection mode (i.e. the BMS disconnects the load due to a fault), they sometimes need a “Jump Start” to wake them back up.
Always consult the manufacturer instructions to see what they recommend, but if no specific instructions are provided you can normally use this information.
PowerPaul DALY BMS based batteries do not normally need jump starting, they will self-re-start when the fault condition is removed. Pressing the button on the display is another way to wake it. If the battery has been drained and restarted several times without being charged, it may remain in protection mode until a charge is detected.
Our “Lite” range of batteries have a simplified BMS, which behaves differently. In the event of it going into protection mode due to over-discharge or short circuit, it may require external assistance to wake up. This can often be done with the chargers installed into the system providing the charger is capable of doing so (not all of them can do this). But if you’re unable to access mains, vehicle or solar based charging to do this there are other ways.
The “Jump Start” method should be used WITH CAUTION! You should NEVER jump start directly from another LiFePO4 battery, this can cause too much inrush current.
You may however use a regular Lead Acid/AGM car battery or a car “jump start” device in a similar way to jump starting a vehicle. If jump starting from a vehicle starter battery, this should be done with the engine OFF to keep current flow to a minimum. Once the battery has woken up (should normally only take a few seconds), disconnect the jump battery immediately and allow the system to recharge it fully as normal. Leaving the jump battery connected may drain it quickly.
