I purchased my solar panels and battery back up system back in 2014. I paid cash for the entire system back then. Before the syelsstem was installed APS did a cost analysis based on my usage of electricity and it was determined that my monthly avg. bill was approx. $200.00 per month. In May of 2014 the installation was completed. I have had nothing but problems with this company . Not only did they do a shoddy job in the installation of 24 panels that I was told would more than handle my power needs (which was a lie) my monthly bill avg. was still more than $100.00 dollars most of the time closer to $150.00. My lights still to this day flicker everytime there is a power surge that I have mentioned to these idiots more than 20 times.They finally delivered the so-called battery back-up sytem almost 2 years later and installed it in May of 2016. Now I'm sitting here for three hours and no power from APS or the so-called back- up system.These people do not like to follow up on their promises or return calls. So please run far and fast as you can from these criminals, because that's what they'll do is take your money and service is something unheard of with this company. They even tried to charge me again for half of the cost of the back-up system. This company is definitely a scam artists dream in ripping people off. Don't do it, don' t even listen to them or give them a call, they will try and take you to the cleaners. I know much time has past since this shoddy work was done but I tried to be as patient as possible but enough is enough , I'm through talking with these clowns.