... MCU control, more stable capablity5. High efficiecy rate of DC - AC conversion, minimize energy loss 6.Tower design, can both ... activated 11. Offline-charging functions (when the utility comes to normal, even if it is not turned on, the ... 230VAC Frequency50Hz ±0.1HzWave formModified sine wavePower factor(AC to AC)>95%Power factor(DC to AC)>80% Battery TypeSealed Lead-Acid, Maintenance-freeNormal ...