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00:00:00 – 00:12:58
The video discusses repurposing used battery modules into plug-and-play battery systems for solar power, focusing on comparing a 24-volt lithium iron phosphate battery with a new 48-volt NMC battery ideal for off-grid solar power systems. The speaker emphasizes the importance of matching battery chemistries for optimal system performance. Building a 48-volt solar power system with safety measures, correct voltage settings, and adapter creation is highlighted. Actions such as adjusting charge profile settings, conducting capacity tests, and handling battery safety modes are demonstrated. The speaker stresses the importance of safely handling batteries and troubleshooting quality issues in soldering and wiring. The video concludes with successful charging tests, minor dislikes, and sharing knowledge about the system and BMS resetting.
00:00:00
In this segment of the video, it is discussed how BigBattery.com repurposes used battery modules into plug-and-play battery systems for solar power. The focus is on comparing a 24-volt lithium iron phosphate battery with their new 48-volt NMC battery, highlighting differences in size, weight, capacity, and chemistry. The 48-volt battery is detailed as ideal for off-grid solar power systems and can be configured in series with others. The speaker mentions their positive experience with the 48-volt battery and stresses the importance of matching battery chemistries for optimal system performance and longevity. Testing and features of the 48-volt battery are also mentioned.
00:03:00
In this part of the video, the focus is on building a 48-volt solar power system with an MPP LV 5048 five-kilowatt inverter. The video highlights the importance of not connecting a lithium iron phosphate battery in parallel to an MC battery. The process includes making an adapter with a 50-amp Anderson connector, charging the inverter’s capacitors with a resistor before connecting it to the battery to prevent damage to the BMS, and setting the absorption and float voltages correctly for charging the battery. The video emphasizes safety measures and ensuring the inverter is functioning properly before attaching loads and chargers to the system.
00:06:00
In this part of the video, the key actions include adjusting charge profile settings, setting absorption and float voltages, configuring low voltage cutoff, equalization voltage and time, and bridging l1 and l2 on the input to enable charging. The individual also conducts a capacity test using a kilowatt counter meter, measures the charging current, and examines the high voltage disconnect. The battery eventually charges successfully, and the capacity test results in 3987 watt-hours, meeting the rated capacity of 3.8 kilowatt hours.
00:09:00
In this segment of the video, the speaker discusses calculating the C rate for charging and discharging a used battery. They highlight the importance of not exceeding certain wattage limits due to circuit breaker restrictions. The speaker demonstrates troubleshooting steps to take a battery out of safety mode and points out quality issues in the battery’s soldering and wiring. They emphasize the need to inspect batteries upon purchase and discuss the proper attachment of a circuit breaker. The segment ends with the speaker sharing their struggles with getting the battery out of safety mode and indicating the importance of safely handling batteries.
00:12:00
In this segment of the video, the individual demonstrates charging up the capacitors, verifying that the system is working fine at 44 volts without error codes. They mention the 30-amp output to the batteries and some wiring details, like using the original wire from a BMW pocket. Despite minor dislikes, the system passed the test, but they express disappointment about the circuit breaker. They end by mentioning knowledge about using lv 50 48 and how to reset the BMS in safety mode, concluding with a farewell message to viewers.