Single Phase Off Grid Solar Inverter

FI series :single phase off grid solar inverter

      Next, he and his assistants started to test these 1600 kinds of heat-resistant materials by category. You can try it, or platinum is the most suitable. The lamp life has been extended to 2 hours thanks to the improved pumping method, which results in a higher degree of vacuum inside the glass bulb. But this kind of lamp made of platinum is too expensive.  Who wants to spend so  much money to buy a lamp that can only be used for 2 hours?

     The experimental work fell into a slump, and Edison was very  distressed. One cold winter, Edison sat idle by the fire, looking at the blazing charcoal fire, he couldn't help but mutter to himself: "Charcoal..."

I have tried charcoal bars made of charcoal, what should I do?  Edison felt the heat all over his body, and he tore off the scarf around his neck. When he saw the scarf made of cotton yarn, a thought suddenly sprang into Edison's mind:

     right! The fiber of cotton yarn is better than that of wood, can this material be used?

     He hurriedly tore a piece of cotton yarn from the scarf, and  after baking it on the fire for a long time, the cotton yarn turned into charred charcoal. He carefully put the charcoal wire into the glass bubble, and after a test, the effect was really good.

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