Although slightly off-topic, I decided to post this since it applies to balcony gardens and indoor small-scale gardens alike.
Tl;de no.
The maximum energy production is thus roughly 400 Wh per day.
The solar panels are connected in parallel and coupled to a solar charge controller and 550 Wh of lead-acid batteries. Assuming a 33% Depth-Of-Discharge (DoD) and a round-trip battery efficiency of 80%, this gives me a maximum energy storage of roughly 150 Wh
Total electricity use in my office is (on average) 500 Wh per day
But to the authors credit he does talk about what changes can be made around the house to do DC to DC conversation as opposed to DC to AC to DC conversation to minimise conversation loss.
Well – he writes his landlord installed solar hot water and he uses “solar heat and thermal underware” for warmth.
So his window sill solar panel installation does not get him off the grid, but a good step further away.
In Spain. Might be more difficult further north.
Perfect is the enemy of good.