Plug DC power into charger, 4 indicators are light, LED is green(no battery)

没有电池情况下，接上电源，4个指示灯是亮的，LED为绿色。

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It may be as simple as connecting it to a bank of capacitors and then running that through an inverter to convert that DC power into usable ac.

它可能会像连接到一个简单的电容器银行然后运行，通过一个逆变器的直流电源转换成可用交流电。

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The company manufactures power inverters necessary to convert the DC power generated by solar panels into the ac power required for most USES.

公司生产电力逆变器，把太阳能生成的直流电源转换为使用最多最需要的交流电源。

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Inverters and microinverters convert the direct current (DC) power produced by solar panels into alternating current (AC) used in homes and businesses.

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Solar panels produce electricity in DC, which needs to transform into AC for feeding the electric grid or for using the power onsite.

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The portable programmer, which plugs into the DC port under the locks, can also open any door, even providing power through that port to trigger the mechanism of a door lock in which the battery has run out.

FORBES: Hacker Will Expose Potential Security Flaw In Four Million Hotel Room Keycard Locks