True Hybrid Energy System
4 posts • Page 1 of 1
What is the inrush current for the battery circuit when I turn on the battery breaker in the BOS ? I have a 48V, 16s 280aH battery pack with a 150 amp class T fuse between the battery pack and the skybox. When I turned on the battery breaker in the Skybox BOS it blew the 150 A fuse. The fuse is a Littlefuse JLLN 150A-P which is fast acting. So far I can't find a slow-blow class T fuse. Does Outback have a recommended fuse/circuit breaker that can handle the inrush of the skybox ?
- Mike Curran
- Forum Emperor
- Posts: 2509
- Joined: Sat Aug 28, 2004 6:28 pm
- My RE system: Outback - Garage roof:
- 8 (2x4) Evergreen 180's into one FM80 (2007/2020 - replaced MX60)
- 6 (2×3) ALEO S79-300's into one FM80 (2017)
- 2 grid-tied VFXR3524A-01's series stacked, replaced GVFX's (2020)
- 12 Surrette/Rolls 2V x 1766Ah (2007)
- Hub10.3, Mate3s, FNDC, RTS. Tigo ES maximizers on each PV module.
Westinghouse Solar - Barn roof: (2012)
- 30 (2x15) 235W panels with Enphase M215 microinverters, grid-tied
Outback Skybox - Barn roof: (2019)
- 14 Talesun 275W in series (DC array input to SB inverter/charger)
- 3 SimpliPhi 3.8 batteries, 48V, 225Ah total
- AC coupled input from 14 Talesun 275W, Enphase M215 microinverters
Battery systems operate in grid-tied, battery backup mode
All self-designed and self-installed
- Location: Chagrin Falls, Ohio
I don't know but I can't believe it's over 150A. Before you turn on the breaker, is the red led indicator on the breaker lit? If so your battery polarity is reversed. If not I would recommend rechecking all of your wiring. And make sure that when you're switching the battery breaker on that your AC load breaker is open (off).
No, the red light on the breaker was not on. I verified correct polarity and wiring is correct. I did have the AC breaker on. I will try powering up the skybox with battery only (line AC & load AC breakers off). Just waiting for my replacement fuses now. Thanks
- Forum Whiz
- Posts: 25
- Joined: Tue Aug 25, 2020 1:18 pm
- My RE system: Skybox 24 260 watt panels, 2 12 string kong 48 volt 233 amp lipo4 battery 12k watts
I have roughly the same size battery but a 300 amp fuse. However mine has generally tripped when conditions were set outside bms parameters so check skybox settings against your bms and monitor your bms.