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wattline GmbH ( and HKI have entered into a cooperation. The main product of wattline is the pooling of its customers' energy demand (on the German market). This creates a bargaining power that regularly leads to significant savings for customers. In addition to the advantages of the energy services offered, HKI members also benefit from special conditions. wattline's fee for energy pooling, which is only a percentage of the first realised savings, is reduced by another 20% for you.