fmeili1
Solar Enthusiast
Another fire because of a home-made solar battery.
This time, on the popular holiday island of Rügen in Germany, €300,000 structural damage (the link points to a German news story and may be translated online). Until now they don't have more technical details about the DIY battery - but there were 3 explosions in a row the neighbors told the first responders...
Many people underestimate the potential dangers of improper battery construction and operation. Many of the DIY videos suggest that it's very easy... yes, in theory that's true... BUT the dangers lurk in places that people often underestimate - even if the battery cells and BMS were connected "logically correctly" it happens that they use too small wires, busbars that are too weak, poor contacts, incorrect torques, use of cheap crimp connectors and tools and many other possibilities. If someone is unfamiliar about the potential danger of very high currents and/or with high PV DC voltages the potential dangers are just not on the screen of the people.
This is a real problem. If these types of incidents increase, it will not reflect well on the future regulations of DIY solar and battery systems and will put additional obstacles in the way of all of us DIYers. On the other hand we want and encourage others to DIY - that's the idea of this forum and our hobby...
I have no idea how it can be improved... maybe even more information, instructions, assistance, etc. but against a poorly implemented system, nobody can do anything against it.
This time, on the popular holiday island of Rügen in Germany, €300,000 structural damage (the link points to a German news story and may be translated online). Until now they don't have more technical details about the DIY battery - but there were 3 explosions in a row the neighbors told the first responders...
Many people underestimate the potential dangers of improper battery construction and operation. Many of the DIY videos suggest that it's very easy... yes, in theory that's true... BUT the dangers lurk in places that people often underestimate - even if the battery cells and BMS were connected "logically correctly" it happens that they use too small wires, busbars that are too weak, poor contacts, incorrect torques, use of cheap crimp connectors and tools and many other possibilities. If someone is unfamiliar about the potential danger of very high currents and/or with high PV DC voltages the potential dangers are just not on the screen of the people.
This is a real problem. If these types of incidents increase, it will not reflect well on the future regulations of DIY solar and battery systems and will put additional obstacles in the way of all of us DIYers. On the other hand we want and encourage others to DIY - that's the idea of this forum and our hobby...
I have no idea how it can be improved... maybe even more information, instructions, assistance, etc. but against a poorly implemented system, nobody can do anything against it.