Needs manual setup
Victron Energy Quattro 48/5000/70-100/100 120V + Fortress Power eVault Max 18.5
- Voltage matches: the 51.2 V battery suits this 48 V inverter.
- The battery maker says it works with this inverter's link (Victron BMS-Can), but the inverter maker doesn't list this battery. The battery maker says it can run without communication, so you enter its charge settings on the inverter by hand.
Checked automatically against spec sheets. Not yet confirmed in a real install. Last checked 2026-10-12. 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
-
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 180 A per battery, from the battery's spec sheet.
- Charge voltage, float voltage, and low-voltage cutoff: from the Fortress Power eVault Max 18.5 manual.
- Closed-loop communication needs an extra part: Victron GX device (e.g. Cerbo GX) for BMS-Can or a Lynx Smart BMS.
Published limits, side by side
| Spec | Victron Energy Quattro 48/5000/70-100/100 120V | Fortress Power eVault Max 18.5 |
|---|---|---|
| Voltage | 48 V accepts 38–66 V | 51.2 V |
| Current | Max battery current Not published | Max charge 180 A Max output 180 A Peak output 230 A |
| Communication | Victron BMS-CanVictron VE.Bus BMSVictron Lynx Smart BMS | Sol-Ark closed loopOpen loop (no comms) |
| Cable connection | Stud size M8 | Terminal M10 |
Values come from each maker's documents. "Not published" means the maker doesn't state it.
Confirm with the makers before you buy
- Each product's current limits. One or both aren't published, so ask both makers.
- Which firmware versions support this pairing. We don't track firmware.
- That your cable lugs fit the inverter's battery studs (M8) and the battery's terminals (M10).
- 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
Victron Energy Quattro 48/5000/70-100/100 120V
- Shop Solar Kits
- Victron Energy (maker)
Fortress Power eVault Max 18.5
- No store links yet. The maker's site is below.
- Fortress Power (maker)
Spot a mistake? Email errata@offgridstacks.com with this page's link.