Measure a 12 V solar equipment
The 4 LEDs on the K2 Solar are sufficient for the consumer. For a test report one would like however significantly more information about the device.
Previously I had to measure with 2 Multimeter Volt and Ampere between photovoltaic and solar system . The watts are a multiplication between volt and ampere. For the Wh, you just have to calculate the wattages and add them. Now all of this is done by the Electrical Parameter Tester.
It was just 25 watts, suddenly only 9 watts, although the sun seems the same. The battery is full, since the K2 Solar can no longer use the current to charge the battery, but only the connected laptop.
This theory is verified by the smartphone additional connected at the USB output. Now 14 watts are used from the photovoltaic. Exactly the 5 Watt more, which the Smartphone at the USB output consumes.
The Electrial Parameter Tester is between photovoltaic and K2 Solar.