Could Rondo energy achieve much better outcomes by using heat pumps to create the heat they store? They are running during the day when COPs are best, let’s say 2.5 COP conservatively. That’s 250% kWh to heat stored * 40% heat to power = 100% of kWh in during the day to kWh out during the evening. Yes there’s a bit of heat loss in storage but also sometimes COPs are even 3+ so 2.5 feels good enough for back of envelope.
Could Rondo energy achieve much better outcomes by using heat pumps to create the heat they store? They are running during the day when COPs are best, let’s say 2.5 COP conservatively. That’s 250% kWh to heat stored * 40% heat to power = 100% of kWh in during the day to kWh out during the evening. Yes there’s a bit of heat loss in storage but also sometimes COPs are even 3+ so 2.5 feels good enough for back of envelope.