D
danesol
Today, was a bad day for solar generation for us, any power been generated was used internally by the dishwaster etc etc, however some was avail to the solar immersion device, but very little, so my wife had to turn on the Gas Boiler ( 3yr old Valiant Condenser boiler ) at 6pm'sh to ensure she had hot water for her bath, so I found it was time to see just how much it costs to heat semi hot water via the gas boiler - here are my findings, even though the water had been preheated now and then by the immersion device.
Reading after boiler shut off ( Both reading and pic taken after 50mins ) - 2949 [28] 2
Reading before ( picture taken of meter prior to boiler been switched on ) - 2949 [16] 3
Total gas used = 0.12 units
Convert to kwh via multiplying by 31.5
= 3.78kwh
Cost of that gas 3.78 @ 3.45p per kwh = 13p ( ignoring std charge for this exercise ! )
Therefore rounding up to 30p for 2 heats per day - to allow for a colder fill and still an estimate as winter mths would cost alot more, over 365 days a year that would cost 30p x 365 = £ 109.50
Even using my exact reading for one heatup from been preheated - still would cost £ 94.90 p/a
So my previous estimation of £ 80 saving using my Solar Immersion Device could be well under and the saving even for GCH users could be more than you think ....... food for thought
Please check my calculations and comment away.....................
Reading after boiler shut off ( Both reading and pic taken after 50mins ) - 2949 [28] 2
Reading before ( picture taken of meter prior to boiler been switched on ) - 2949 [16] 3
Total gas used = 0.12 units
Convert to kwh via multiplying by 31.5
= 3.78kwh
Cost of that gas 3.78 @ 3.45p per kwh = 13p ( ignoring std charge for this exercise ! )
Therefore rounding up to 30p for 2 heats per day - to allow for a colder fill and still an estimate as winter mths would cost alot more, over 365 days a year that would cost 30p x 365 = £ 109.50
Even using my exact reading for one heatup from been preheated - still would cost £ 94.90 p/a
So my previous estimation of £ 80 saving using my Solar Immersion Device could be well under and the saving even for GCH users could be more than you think ....... food for thought
Please check my calculations and comment away.....................
