Three Output Modes PV priority mode: Switch to mains supply when the PV charging fails. This mode maximizes the use of solar energy while maintaining battery power, suitable for use in the areas with relatively stable grid. Mains priority mode:Switch to inverter only when the mains fails (when there was mains power, switch to mains power for charging and power supply). Then, the unit is equivalent to a backup UPS, suitable for areas with unstable grid. Switching does not affect PV charging. Inverter priority mode: Switch to mains supply only when the battery discharge under voltage is lower than the set point (item 04). When the charging battery is higher than the set point of (05 setting item), switch to the battery discharge mode. This can cycle the battery charge and discharge. This mode maximizes the use of DC power and is used in the area with stable grid. Switching does not affect PV charging. Warnings： This solar inverter is off grid inverter. It can not be used in parallel.This pure sine wave inverter can only used for 24V solar system.Optional WiFi/GPRS remote monitoring need extra cost.Voltage setting logic:[15]＜[12]＜[04]＜[14]＜[35]＜[37]＜[05]＜[09/11] 3000W DC 12V 4000W DC 24V 8000W 48V with WIFI/COMM 6500W 48V with WIFI/COMM 12V 100Ah LiFePO4 battery 24V 100Ah LiFePO4 battery Add to Cart Buying Options Add to Cart Buying Options Add to Cart Add to Cart Price $825.00$825.00 — no data $1,546.00$1,546.00 — no data $295.00$295.00 $589.00$589.00 Output Power 3000W 4000W 8000W 6500W 1280Wh 2560Wh DC Input 12V 24V 48V 48V 12V 24V AC Input 120V 120V 120Vac/240Vac 120Vac/240Vac - no data - no data AC Output 120V 120V 120Vac/240Vac 120Vac/240Vac - no data - no data