I had the solar repair guy out yesterday and as soon as he opened the cover on the older of the two inverters one could see what's wrong. There are two blue capacitor-looking gizmos soldered to connectors on the ceiling of the inverter box. One of them was hanging at an angle and upon closer inspection you could see that it was only hanging on by one soldering point instead of four. So that inverter hadn't been working for quite a while. As luck would have it, the unit was 10 years old (warranty age) in May of this year. Also, they don't stock that part anymore, so I need a new inverter. Looking on the bright side, the new inverter will be guaranteed for 10 years and my existing solar panels are supposed to be good for 20 years, that means the new inverter and the solar panels will run out of warranty/steam at the same time! Oh well. in 10 years I'll be 91, and probably not around anymore anyway!Oh, no. That’s a huge hike in your bill... Someone will have to look into it. So sorry to hear, Yvonne, and a big electronic hug for what it’s worth.