Victron Phoenix Inverter 12/800 wiring diagram

These notes cover the legacy Phoenix/Inverter 12/800 VE.Direct described in Victron's July 2024 manual. Its model specification table rates 800 VA, with 650 W continuous at 25°C, 560 W at 40°C, and 1500 W peak. The catalog's continuous rating therefore matches this older generation. Newer HW15 products have different power ratings; do not transfer their figures or terminal torques to this unit without matching the part number.

The 12/ prefix means nominal 12 V DC input. AC versions have different sockets and nameplates; confirm whether the installed inverter supplies 230 V or 120 V. The generic catalog record does not identify a complete hardware/AC suffix, so this remains family-qualified.

DC + / DC − are the battery input. AC L / AC N represent the output socket conductors, not a shore-power input. The Chassis PE port represents the required external Class I protective-earth lug. Preserve the output socket's earth connection as well. Its 125 A catalog limit is a planning envelope copied from the existing DC terminals, not a manufacturer earth-lug ampacity. The remote on/off connector and VE.Direct port remain omitted.

Appendix B specifies an earth conductor at least half the battery-cable cross-section, using its tabulated conductor sizes; the earth lug accepts at most 25 mm². This protective conductor is separate from the normal DC return.

Neutral-to-earth bonding depends on the outlet version and installation. The manual says standard units have an isolated/floating output, while GFCI versions are bonded internally. Have that arrangement checked before relying on an RCD/GFCI; do not assume the drawn N is already earth-referenced. Never connect the inverter output directly to another energized AC source. A shore/inverter installation requires suitable transfer equipment.

The battery table, printed page 4, gives 16 mm² for 0–1.5 m and 25 mm² for 1.5–3 m on the 12/800, with 100 Ah minimum battery capacity as its guideline. Actual battery discharge capability and BMS limits must also support startup demand. The model's terminal capacity is 25 mm²; this legacy manual establishes no numeric tightening torque.

The listed 150 A BF1 internal fuse is distinct from battery-cable protection. The manual requires an additional fuse/breaker near the battery for cables beyond 1.5 m, and for UL NEMA-GFCI versions at every cable length. Select battery-side protection with the installed conductor and applicable installation requirements; do not present the internal fuse as a universally specified external rating.

Configure low-voltage shutdown/restart and ECO mode through VE.Direct. Bluetooth requires the separate VE.Direct Bluetooth Smart dongle on this generation. Default ECO wake-up is 15 W, checked every 2.5 seconds; small electronics may fail to remain powered in ECO. Normal no-load consumption is about 6.5 W for the 12 V model, versus 1 W in default ECO.

Use a dry, ventilated IP21 location with 100 mm clearance around the unit. Follow the mounting-orientation drawings and keep ventilation openings unobstructed. Check battery polarity before energizing, then test the intended load and shutdown behavior. Heat, cable voltage drop and motor starting surges can reduce usable capacity below the headline wattage.