ตัวระบบสามารถทำงานได้แม้ในยามไม่มีไฟฟ้า และสามารถทำงานตามปกติเมื่อมีกระแสไฟฟ้า Must have solution top quality assurance for 5 years when in warranty terms Should have a completely new inverter quickly Work on Saturdays, Sundays and general public holidays in whole as an alternative of normal operate times Because of the said day No really need to buy electric https://bluetechsolarcell.com/solar-rooftop-%e0%b8%82%e0%b8%ad%e0%b8%99%e0%b9%81%e0%b8%81%e0%b9%88%e0%b8%99/