Many thanks for your information. I was aware that there is a battery inside the control box, from info. from the downloaded Hobby manual, but the control panel alarm does not suggest it. But I am hoping to get an answer from someone who is familiar with this control panel, and is ‘Hobby approved’, so is able to talk to Hobby directly. Given the problem I have, he thinks it might be a software update needed, or an overcharging problem. I will definitely tell him of your suggestion. Thank you, again.