Luminous Optimus 3800+ 3.5KVA 36V INVERTER AND UPS Capacity- 3500 VA, Maximum bulb load- 2800 W Technology- Sine Wave Technology No of battery supported- Three Batteries (12V each) Display: State of the art LCD display which shows real time Inverter battery performance statistics Charging current: User can choose charging current between 8A-21A, for optimized performance Optimized performance: User can choose output voltage between 200V-240V, to optimize between longer backup time and performance Fast battery charging: Low voltage battery charging begins from 95V and fast charging from 135V input supply Mode selector: Eco and UPS mode available Complete safety for your home with protection features and alarms on short circuit, overload, over temperature and low battery Safety for your equipment as it supplies grid like power to the connected load Supports all Battery types (Flat, Tubular and SMF) and all battery capacities (80Ah-250Ah) Optimus series is a micro-controller based, advanced pure sine wave inverter series, equipped with mains by pass switch and battery charging current setting. Its informative LCD display shows eight real time performance statistics, including charging time, back-up time at current load, running load status, fault indications and much more. It offers flexibility to choose between higher backup time and better performance by controlling output voltage. Optimus inverter series is a great choice for your household, commercial and office needs