I have an ENERDRIVE ADVENTURER 12V DC power supply system. It comprises a DC-to-DC charger, an AC-to-DC
charger, as well as a 240V AC inverter. The ENERDRIVE ADVENTURER system is powered by 12V
240Ah LiFePO4 battery system. The battery has a DALY 12V 250A battery
management system. The battery management system has software which maps the voltage to the State-
Of-Charge (SOC) of the battery. And the table of values is only theoretical, so it's not accurate. I wanted
to have a more accurate mapping of battery voltage to State-of-Charge capacity. So over the course of
several weeks I used the inverter to power up chargers for my BOSCH 18V lithium battery,
as well as my MILWAUKEE 18V lithium batteries. And I also charge several NiMh
low-self-discharge batteries. I let this occur over several weeks, draining the full capacity
240Ah battery down to the point where the battery management system shuts down because the voltage
is too low. And at various times during the process, I recorded the voltage of this battery using the
ePRO battery monitor which is connected to a shunt. And recording the voltage versus the State-
Of-Charge of the battery. So the State-Of-Charge of the battery monitored through this ePRO battery
monitor is more accurate because it's Actual compared to the factory setting State-Of-Charge
in the battery management system. I'm doing this so that with Actual values of State-Of-Charge, I
can reset tables in the battery management system from theoretical to Actual values. So join me in
this video as I attempt to reboot the battery management system, & wake it up. I have here
a multimeter. I will measure the voltage of the battery, & see what the voltage is at the moment.
So negative probe to the negative terminal which comes in to the battery management system.
And positive probe to the positive terminal of the battery. I'm reading a voltage of 12.02V.
That is strange to me because in the battery management system configuration, the low-voltage
shutdown is 10.4V. I will try & see if I can understand what has happened. When I began the last
series of charging the BOSCH & MILWAUKEE batteries, the ePRO battery monitor showed that the battery
was at 30% State-Of-Charge. I suspect that what has happened here is that as the inverter continued to
supply power to my battery chargers, the voltage of my battery eventually dropped to below 10.4V -
which is the shutdown voltage of the battery management system. So this disconnected the
inverter, & eventually after several hours the battery voltage must have slowly climbed back
upwards. However, the battery management system must have some sort of operating protection that
prevents itself waking up even though the battery voltage climbs back upwards - until it detects an
external voltage of at least 0.8V to 0.9V higher than the voltage of the existing battery.
I have a 50A Anderson connector on the cable connected to this lead-acid battery.
I'll plug this in into this socket another Anderson plug which I labelled Car-Battery In.
So this means the ENERDRIVE system will then be receiving 12V power from this battery.
This is a 00B&S cable that connects the ENERDRIVE ADVENTURER to my 240Ah battery.
On the side, there's a battery-reset button. This button fundamentally connects the
car-start battery - which is connected to my small 12V sealed lead-acid battery. It connects that
to the big 240Ah battery. And in theory, that should wake up the
DALY battery management system. So I'll push this button, & see if that works.
Doesn't work. I don't understand why? Do the battery reset again.
It still doesn't work. I don't understand why? I will have to investigate further.
I tried a third time pushing the battery reset button, & it worked. I have a 330W solar panel
connected to this DC-to-DC charger, & you can see that it's receiving 2.6A from the solar panel.
And the battery voltage is now 12.2V from the charging. So I don't understand why,
but it seems that my persistence with just trying again - without doing anything different -
did finally wake up the battery management system. So that's good but doesn't help me understand why.
Now that the battery management system has woken up, I'll measure the voltage of the battery which
is now receiving solar power charging. And the voltage is 12.16V. This is the Anderson
connector for my 330 watt solar panel previously when i measured across the input and output ends
of the battery management system (BMS) terminal. When the BMS was asleep there was no circuit. Now with it
awake, there should be a circuit. And you can hear my multimeter beep. There' a circuit. So it's very
clear the battery management system has woken up. I can now disconnect this small lead-acid battery.
And I usually keep this here, so that if I need to wake it up, I have this battery to wake it up.
And conversely, I use this inverter to charge this battery as well, when the system is charging
via solar panel. Well, I hope you found this video interesting & informative. If you have a
LiFePO4 battery with a battery management system that's gone to sleep, & you don't have
such a system as the ENERDRIVE ADVENTURER with the battery-reset button, that's okay. There are 2
other ways you can wake up your battery management system if it has gone to sleep. One is to use a
simple lead-acid battery like this, similar voltage as the deep-cycle battery that you are trying to
wake up. Just connect the terminals of the battery you have, to the battery that is asleep. And the
higher voltage of this battery should wake up the battery management system. Alternatively, I've used
another method. I've used an AC-to-DC regulated power supply. It's just a 'block'. I've set the
voltage to 12V. Connected it to my house 240V AC power supply. And connected the terminals
to the terminals of the deep-cycle battery. Turn the power on the power supply, & it's woken
this up. Do hit the Like button, & Subscribe to my channel to help it grow - thank you very much.