8200W Hybrid Solar Inverter 48V MPPT On and Off Grid

Model STM82248 is a hybrid inverter for 48V battery systems, rated 8200W. At this size it is a whole-building machine rather than a backup box: contractors specify it for guest houses, farms with irrigation and cold storage, and mid-sized retail units moving to a hybrid supply.

On the array side, the MPPT tracker operates from 90 to 450VDC with a nominal operating point of 360VDC, accepts up to 500VDC open circuit, and delivers a maximum PV charging current of 160A. Full-load tracking is held between 360 and 450VDC, so the string should be designed to sit in that band, and maximum DC to AC conversion efficiency is quoted at 98%. On the AC side it feeds 220, 230 or 240VAC at a nominal 35.6A with a power factor above 0.99, and synchronises to a grid between 195 and 253VAC at 50 or 60Hz. Two load outputs are provided: the full 8200W main output and a second, non-essential output rated to 2733W that is shed first, with main load cut-off at 44VDC.

Hybrid, on-grid and off-grid installations are supported.

Specifications

• Model: STM82248
• Rated output power: 8200W
• Battery system voltage: 48V
• PV nominal operating voltage: 360VDC
• Maximum PV array open circuit voltage: 500VDC
• MPPT operating voltage: 90-450VDC (full load 360-450VDC)
• MPPT trackers / maximum input current: 1 / 27A
• Maximum PV charging current: 160A
• Feed-in grid range: 195-253VAC, 49-51 (+/-1) Hz
• Nominal output: 220/230/240VAC at 35.6A, 50/60Hz
• Power factor: greater than 0.99
• Maximum conversion efficiency (DC/AC): 98%
• Second load output: up to 2733W
• Main load cut-off voltage: 44VDC