I have a 110, 14W energy saving globes installed in the building, single phase supply. I believe these globes have a PF of 0.06. Problem when the power fails and they are supplied by the inverter, the battery bank consisting of 4 X 12V X102APH batteries fails within two hours. I understand that the amperage rises to 11.66 due to the PF of the globes. I have calculated the a 1KVAR capacitor would be required to correct the PF to 0.9. Perhaps one of you who have more experience of PF correct could advise if my calculation is correct and where I may purchase the capacitor in Durban.