The yellow underwing (Noctua Pronuba) is abundant in Hampshire and enjoys a wide range of habitats from garden to grassland, to moorland and wood –  this one appeared to be assessing the interior of my battery box as a new home. I found him after a power cut, when I went to check on the flow of energy from the solar array to the two large batteries deployed to store it. As hours in the sun are increasingly outweighed by those in darkness, I sense I will need to really eke out the flow of electrons

Traffic lights on the charge controller looking more positive, after two days stuck in the red.