Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls
Hitachi has introduced a new line of water heaters that use carbon dioxide as the refrigerant in a heat‑pump system. The units are designed to work with time‑of‑use electricity tariffs, allowing them to operate when solar generation is high or rates are low. The company says the technology improves efficiency and reduces emissions compared with conventional electric heaters.