I’m new to solar power and just follow tons of YouTube videos. This Works great for me storing solar power for free into batteries and and transforming my batteries power into 115-120 alternate current volts 60hz. I’m able to power 10+ LED light bulbs in various spaces, a flat screen TV, wireless internet,game system, have a Hurricane fan blowing at max speed, power laptop computer, charge a phone a freezer and still have extra wattage for more. Great for daily use and in case of an electrical blackout.I tied to 6, eight volts batteries that I paid 50 bucks for all, they are led acid batteries and have plenty of acid, voltímeter reads 8+volts DC on each but it wasn’t enough to power a golf kart for a full golf tournament so the seller change to lithium batteries.I found tree semi worn 36 volts Photovoltaic panels that produce 29 volts max on a sunny Florida day and paid 65 a piece.I bought a 100 feet long black and red cable spull gage #4, for $77 on Amazon and a crimper tool with big round copper connectors for $35, and a 100 amp breaker that I put on the positive side of the batteries just before connecting the red cord to the converter for $20. I did all the splicing and tying myself in 2 hours. You can’t not use this converter without batteries, it won’t work. I try it.I used 3 of the eight volts batteries in series for a total of 24+ volts and then I did the same for the other 3 batteries separated. when I had 2 arrays of 24+ volts created, I put them in parallel and with the cables ( black and the red with the breaker on the red cable already connected on the converter), then I screw the negative cable first to the batteries negative terminals and the positive cable to the positive battery terminals.It works marvelous. I wish I could find more deals and build me 6 or 7 of this mini arrays and run my entire house.