# RostEnergy > RostEnergy installs rooftop solar systems for homes and businesses in Pattaya and Chonburi, Thailand. We design each system for the site, install it, and handle the full PEA grid-connection paperwork. Most residential systems pay back in about 4–5 years. RostEnergy has been operating since 2021. The website is available in English and Thai. ## Services - Residential rooftop solar (grid-tied) - Commercial and industrial rooftop solar - Battery storage, installed with a new system or added later - Service and maintenance plans - Free site survey and a custom quote for each roof ## Key facts - Service area: Pattaya, Jomtien, Huay Yai, Bang Saray, Si Racha and the wider Chonburi province; larger commercial projects across Thailand - PEA paperwork: we handle the application, inspection and bi-directional meter for grid-connected systems - Payback: typically 4–5 years for residential systems in the Pattaya / Chonburi area - Warranty: solar panels carry a 25-year performance warranty - Batteries: systems are designed to be battery-ready, so storage can be added later ## Contact - Website and quote form: https://rostenergy.com/#contact - Phone: +66 81 094 6167 - Email: rostenergy.th@gmail.com - LINE: https://line.me/ti/p/Vo7KTwU7FE - WhatsApp: https://wa.me/message/DFQOC6Y4QJ4SI1 - Instagram: https://www.instagram.com/rostenergy_ ## Pages - [Home](https://rostenergy.com/): services, recent projects, savings calculator and contact form - [Why solar](https://rostenergy.com/#why): Thailand electricity prices and payback - [Services](https://rostenergy.com/#services): residential, commercial, battery and maintenance - [Projects](https://rostenergy.com/#projects): recent installations around Pattaya - [FAQ](https://rostenergy.com/#faq): payback, permits, rainy season, maintenance, batteries, coverage - [Contact](https://rostenergy.com/#contact): request a free quote