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1. Embed this notice
   Terence Eden (edent@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:13 JST Terence Eden

   Doing some maths on our solar panels and battery.
   Last month, we only paid for 10% of our electricity!
   I'm now crunching the numbers to see just how much the 4.8kWh battery has saved us.

   🌞 + 🔋 = 🥰

   #Solar #SolarPower

   • Embed this notice
     Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Sunday, 28-Jul-2024 22:27:11 JST Ryan Castellucci (they/them) :nonbinary_flag:

     in reply to

     • DamonHD

     @DamonHD @Edent Heat pumps are apparently a challenge to run off battery - my system is limited to about 4kW max discharge and the heat pump can pull a lot more than that. We'll see how this works out in practice.

   • Embed this notice
     Terence Eden (edent@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:12 JST Terence Eden

     in reply to

     More maths!

     Over the last 12 months, we purchased about 1.2MWh from the grid.

     Across the same time, we sold 1.2MWh back to the grid!

     I think that means our #solar panels and battery have got our domestic consumption down to #NetZero!

     It also knocked about £750 off our electricity bills.

     Now I just need to find a way to replace our gas boiler. Sadly can't have a heat pump.

   • Embed this notice
     DamonHD (damonhd@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:12 JST DamonHD

     in reply to

     @Edent what's your barrier to going heat punk?

   • Embed this notice
     Terence Eden (edent@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:12 JST Terence Eden

     in reply to

     • DamonHD

     @DamonHD physics, mostly.

     https://shkspr.mobi/blog/2022/07/why-we-cant-have-an-air-source-heat-pump/

   • Embed this notice
     DamonHD (damonhd@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:12 JST DamonHD

     in reply to

     @Edent are you in a conservation area? If not then at least two of the restrictions you list may (no longer) apply, and the rules continue to be relaxed further. I am also in a terrace but I think that we are going to be able to make a heat pump work.

   • Embed this notice
     Terence Eden (edent@mastodon.social)'s status on Sunday, 28-Jul-2024 22:27:13 JST Terence Eden

     in reply to

     These aren't the final numbers - but are pretty indicative.

     In the last 12 month, having 5kW of solar panels, and a 4.8kWh battery, has saved us a massive two-thirds of our electricity bill!

     And that isn't even taking into account how much we sold back to our neighbours.

     #Solar