LPG vs Economy 7

LPG vs Economy 7 

Below quick comparison of  costs for LPG and Economy 7 Electricity. The comparison is based on a KW/h of energy from both sources. I have not factors in efficiency of end use. 

Economy 7

We get our electricity from Ecotricity. Their economy 7 rate is 13.32p/KWh. 

LPG

We get our LPG from FloGas. They charge 68.00p per litre. 

1 litre of LPG weighs 0.51kg.

1kg of propane = 14.019 kWh

Price therefore approx 7.14p/KWh

Discussion 

You could add 10% on to the cost of LPG, as even a very efficient boiler is not 100% efficient. 

However, it is likely that any use of economy 7 energy will require some form of storage:

• Thermal Store
• Power Wall (Battery)
• Storage Heater

These will "leak" heat in to the home / office when it is not needed (at night) and as such there are some losses to consider there. 

So for heating Economy 7 will be more expensive than LPG. 

For appliances with delayed timers such as dishwashers, or washing machines any loads you can delay so they fall within the off-peak period, will make a saving. 

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