2026-08-08 03:23:05
Any idea what I might be able to do to prevent nature from taking over our #PV every year?
Edit: which doesn't include disassembly which I can't and won't do.
Currently, I cut it down with an extension thingy which is hard work and might also put an additional risk on our modules.
PV-Anlage beim Solateur um die Ecke bestellt. Gutes Gefühl und jetzt schon grobe Ungeduld. Jepp und wirklich Late to the Party! #solarpunk #erneuerbare #pv
PV-Anlage beim Solateur um die Ecke bestellt. Gutes Gefühl und jetzt schon grobe Ungeduld. Jepp und wirklich Late to the Party! #solarpunk #erneuerbare #pv
I calculated how different battery sizes would influence our energy balance. Based on data from 2025. Charging limits and battery losses not taken into account.
25 MWh production from 28,8 kWp #pv
9 MWh load
Current setup with no battery
3,1 MWh from grid
20,3 MWh to grid
1 kWh battery: 0,5 MWh from battery
5 kWh battery: 1,6 MWh from battery
10 kWh battery: 1,9 MWh from battery
15 kWh battery: 2,0 MWh from battery
20 kWh battery: 2,1 MWh from battery
100 kWh battery: 2,4 MWh from battery
1000 kWh battery: 2,8 MWh from battery
5000 kWh battery: 2,8 MWh from battery
The optimal battery size based on that data would have been 7 kWh (256 cycles) to 10 kWh (194 cycles).
Over a lifespan of 10 years, a 7 kWh battery would save 3600 € (1794 kWh times 10 years times 0,2 € (current energy price 0,26 € - 0,6 € lost feed in earning)).
From a financial perspective, a battery still doesn't make sense to me in our situation. Maybe if the inverter needs replacing or if the heat pump changes our usage profile enough.
Does anyone have need of something like a couple of shoe boxes' worth of (probably mono- or poly- crystalline #silicon) #solar #PV cells, from suburban SW #London UK? ~20yo. Likely free to a good home.
#solarCell #solarDIY #someAssemblyRequired #photovoltaic
#solarPunk