Heatcharge.
Seasonal efficiency product follows the Ecodesign requirements

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Panasonic's new full line-up of A+++ heat pumps
In response to the Kyoto Protocol, the European Union set some challenging targets for the reduction in greenhouse-gas emissions. By the year 2020, across the member states, the EU wants to have achieved the following objectives:
  • A 20% cut in greenhouse gas emissions (from 1990 base levels)
  • The share of renewables in the energy mix to increase by 20%
  • An overall reduction of 20% in energy consumption
The new Heatcharge heating power and efficiency
  • Energy Charge System. Heat storage unit which features Non-Stop heating and fast heating function
  • Maximum efficiency and comfort with Econavi sunlight detection
  • Nanoe-G air purifying system
  • More powerful airflow to quickly reach the desired temperature
A: Intelligent Microprocessor
B: DC Inverter
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Powerful, reliable heating even at low ambient winter temperatures
When the air conditioner is operating, the compressor, which is the power source of the unit, generates heat. Until now, this heat was released into the atmosphere. Panasonic focused on this waste heat! Heatcharge is a unique, innovative Panasonic technology that stores this waste heat in the compressor and effectively uses it as heating energy. This lets you enjoy a new level of air conditioner heating power and efficiency.
Constant heating
Using stored heat provides stable heating with less drop in temperature Even when heating operation stops during defrost operation, stored heat continues to constantly warm the room. This eliminates the previous discomfort due to the temperature dropping when heating temporarily stops to ensure stable air conditioner heating.

You can check the charge level with the remote control Press the Information button and the level is displayed in five stages (from 0 to 4)
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GRAPHIC 1
Conventional.
The room gradually becomes cold
Defrost operation: About 11 to 15 min.
Fall in room temperature:
About 5 to 6 °C 

A: Stop heating operation
C: Waste heat
D: Compressor
E: Defrosting
GRAPHIC 2
Heatcharge.
The room is thoroughly warmed
Defrost operation: About 5 to 6 min.
Fall in room temperature:
About 1 to 2 °C

B: Keep heating operation
F: Heat Storage components
D: Compressor
E: Defrosting by storaged heat
Defrost operation time and how low room temperature falls differ depending on the environment in which the unit is being used (how insulated and airtight and room is), operation conditions, and temperature conditions.
Output air temperature falls during defrost operation. How low room temperature falls differs depending on the environment in which the unit is being used (how insulated and airtight and room is), operation conditions, and temperature conditions.
In environments where a lot of frost accumulates, heating may stop during defrost operation.