fix 2024-07-16-energy.md

content/posts/2024-07-16-energy.md

@@ -162,13 +162,13 @@ At 42 kWh of useful battery content from a 60 kWh battery,
 >>> 60*0.2625
 15.75
 ```
-60 minutes to the hour, so 0.2625 of an hour are 15.75 minutes.
+Sixty minutes to the hour, so 0.2625 of an hour are 15.75 minutes.
 
 An electrical flow heater, dispensing water in a household, is using around 21 kW.
 
-A Tesla V4 fast charger will provide 250000 W.
+A Tesla V4 fast charger will provide 250,000 W.
 
-A Porsche Taycan can provide 560 000 Watt (760 hp), for a short time.
+A Porsche Taycan can provide 560 000 Watt (760 hp) for a short time.
 
 [![](/uploads/2024/07/energy-07.png)](/uploads/2024/07/energy-07.png)
 
@@ -178,7 +178,7 @@ A Porsche Taycan can provide 560 000 Watt (760 hp), for a short time.
 
 ![](/uploads/2024/07/energy-08.png)
 
-*I am opening the deep freezer door to take out the choclate ice cream, and I do not close the door properly.
+*I am opening the deep freezer door to take out the chocolate ice cream, and I do not close the door properly.
 The deep freezer goes into overdrive.
 Since I am plotting the 1d average power, I can see how that affects the freezer:
 Average goes up from 13 W to 19 W, peak from 35 W to 90 W.*
@@ -189,18 +189,18 @@ The numbers you see here are power, not energy.
 They only become energy if you are using the power over longer amounts of time.
 
 Saving energy would mean to measure kWh, not kW, and then cut down on the kWh used.
-Or even convert the household so that it generates kWh, i.e. by installing roof solar or balcony solar.
+Or even convert the household so that it generates kWh, i.e., by installing roof solar or balcony solar.
 
-Still, kW are often a good indicator:
+Still, kW is often a good indicator:
 
 Driving 100 km in an electric car at 100 km/h uses 15 kWh.
 Doing the same at 130 km/h uses 22 kWh.
-Doing the same in a combustium engine car at 130 km/h uses 6l of diesel, 60 kWh of raw energy content.
+Doing the same in a combustion engine car at 130 km/h uses 6l of diesel, 60 kWh of raw energy content.
 
 Washing machines, dryers, and dishwashers tend to use a lot of energy, but often only for an hour or so.
 A modern washer uses around 1.3 kWh to wash 7 kg of clothing.
 
-Permanently running devices such as file-servers use a lot of energy, because they are always on.
+Permanently running devices such as file-servers use a lot of energy because they are always on.
 Multiply their power by 24 to get energy.
 
 ![](/uploads/2024/07/energy-10.png)
@@ -228,7 +228,7 @@ but we actually put 29.7 kWh into the grid and took 24.8 kWh out of the grid at
 
 This was a sunny day.
 While we have been drawing almost 25 kWh from the grid (we use around 10 kWh on normal days),
-we also fed almost 30 kWh into the grid, for a surplus of almost 5 kWh.
+we also fed almost 30 kWh into the grid, for a surplus of almost five kWh.
 That is, despite the 2.5-fold higher power consumption than normal, we have provided a net power surplus to the grid.
 We also pulled power from the grid around noon, when solar power is usually available in abundance,
 and the hourly energy prices are lowest.
@@ -238,7 +238,7 @@ and the hourly energy prices are lowest.
 Find a way to 
 [measure power and energy consumption](https://www.amazon.de/dp/B0054PSIDW)
 so that you know and do not have to guess.
-Collect and visialize that data using
+Collect and visualize that data using
 [Home Assistant](https://www.home-assistant.io/)
 or similar.
 
@@ -266,13 +266,13 @@ Cover every surface in solar cells.
 
 Store energy.
 - Get a battery that can provide enough power for your household.
-  Power (Watt) are often a function of the number of cells, which also provide capacity.
-  A 5 kWh LFP battery often can only provide 3000 W.
-  Only larger batteries can provide sufficient power.
+  Power (Watt) is often a function of the cell count.
+  Cells also provide capacity, so larger batteries (more kWh) also provide more power (kW) up to a limit (11 kW).
+  When planning, check both numbers, kW and kWh.
 - To get a household to self-sufficiency, surprisingly small batteries are needed.
-  The minimum of around 1/2 the daily power consumption,
-  or the production of a day in March or October should be sufficient. 
+  The minimum of either half the daily power consumption
+  and the production in a day in March or October should be enough. 
   You may want more, but that is because of power, not energy content.
 - In any case, ~10 kWh LFP should be fine for most households.
-  Having more than you can fill on an early spring/late autumn day is useless, and you won't fill it Nov-Feb anyway.
+  Having more than you can fill on an early spring/late autumn day is useless, and you won't fill it Nov – Feb anyway.
   Having giant capacities in summer is useless, because you won't empty the battery.