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Backup power for your lights


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Who thinks that this is a good idea? 

I have built a battery backup for my lights. It is connected to my regular light switch via an extension box. When the mains are on it charges 6 x 18650 cells, storing about 50wh of power. When the power is out it switches to battery and a mini inverter. This will power a single 5w light bulb for 10 hours, a 10w for 5 hours etc. This is at full brightness, no dimming as with the rechargeable bulbs. 

The cost for the entire system is about R600 using off the shelf parts, making it really affordable, even for multiple units around the house. 

This is a solution for those who can't afford a full on lithium battery / inverter setup but want to keep the lights on. 


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