The Optima 2800ES is a petrol-powered single-phase generator designed for light residential or small commercial loads. It is part of Thermocool’s smaller generator line, suitable for supplying power to essentials (lighting, fans, TV, small fridge, etc.) during power outages.
It uses a 4-stroke OHV (overhead valve) engine with forced-air cooling, which is a common design for reliability in small petrol generators. The “ES” suffix implies that it has electric start, although many units also retain a recoil/manual start as a backup.