Needs manual setup
OutBack Power FXR3048A + EG4 LL-S 48V 100Ah
- Voltage matches: the 51.2 V battery suits this 48 V inverter.
- The inverter maker doesn't list this battery for closed-loop communication. The battery maker doesn't say it can run without communication. Ask them before you set it up by hand.
Checked automatically against spec sheets. Not yet confirmed in a real install. Last checked 2026-10-22. We don't track firmware versions.
Size the battery cable and fuse for this pair in the build tool, from your run length.
What you'll set up yourself
- Ask EG4 whether this battery can run without communication. Their documents don't say.
-
Enter the battery's charge settings on the inverter by hand, in the battery
settings described in the inverter's manual.
- Max charge current: no more than 100 A per battery, from the battery's spec sheet.
- Charge voltage, float voltage, and low-voltage cutoff: from the EG4 LL-S 48V 100Ah manual.
Published limits, side by side
| Spec | OutBack Power FXR3048A | EG4 LL-S 48V 100Ah |
|---|---|---|
| Voltage | 48 V accepts 42–68 V | 51.2 V |
| Current | Max battery current 90 A | Max charge 100 A Max output 100 A |
| Communication | Open loop (no comms) | EG4 hybrid closed loopEG4 EHV closed loopGrowatt SPF/SPE closed loop |
| Cable connection | Stud size M8 × 1.25 | Terminal M6 bolt |
Values come from each maker's documents. "Not published" means the maker doesn't state it.
Confirm with the makers before you buy
- Whether one battery can take the inverter's full current. The inverter's max battery current is 90 A. This battery is rated for 100 A charging and 100 A output. Ask how many batteries to run in parallel.
- Which firmware versions support this pairing. We don't track firmware.
- That your cable lugs fit the inverter's battery studs (M8 × 1.25) and the battery's terminals (M6 bolt).
- How to install both safely, from each maker's manual and your local code.
This result checks two things: the battery's voltage suits the inverter, and the inverter maker lists this battery for closed-loop communication (the battery tells the inverter how to charge it). It doesn't check current limits, charge settings, firmware, cable sizes, or safe installation. Confirm those with both makers before you buy.
Sources
This result comes from the documents below. We haven't yet found an outside source that confirms it, such as a forum report or a video of a real install.
Where to buy
OutBack Power FXR3048A
- No store links yet. The maker's site is below.
- OutBack Power (maker)
EG4 LL-S 48V 100Ah
- No store links yet. The maker's site is below.
- EG4 (maker)
Spot a mistake? Email errata@offgridstacks.com with this page's link.