Victron MultiPlus-II 48/3000 + Cerbo GX + EG4 Battery: Parts List
The parts in the Victron MultiPlus-II 48/3000 system with Cerbo GX, GX Touch 50 and an EG4 Indoor WallMount battery, and the videos showing the build.
Last reviewed 2026-10-10.
Parts
| Role | Part | Qty | Why this part | Where to buy |
|---|---|---|---|---|
| Inverter / charger | Victron MultiPlus-II 48/3000 | 1 | Inverter/charger for a 48 V system with a 35 A charger and 50 A transfer capacity; 120 V US model. | This listing is no longer available at Signature Solar. Original listing removed; the UL-listed 48/3000 is the current listing. See the current model: Victron MultiPlus-II 48/3000 (UL listed) →Affiliate link — we may earn a commission if you purchase through this link, at no extra cost to you. |
| System monitoring and control | Victron Cerbo GX | 1 | Monitors and controls the Victron system. | This listing is no longer available at Signature Solar. The store redirects the original Cerbo GX to the MK2. See the current model: Victron Cerbo GX MK2 →Affiliate link — we may earn a commission if you purchase through this link, at no extra cost to you. |
| Display for the Cerbo GX | Victron GX Touch 50 | 1 | Touchscreen display for the Cerbo GX. |
View on Signature Solar →
Affiliate link — we may earn a commission if you purchase through this link, at no extra cost to you. |
| Battery | EG4 WallMount Indoor Battery 280Ah | 1 | A 48 V, 280Ah (14.3 kWh) wall-mount battery made for indoor use. |
View on Signature Solar →
Affiliate link — we may earn a commission if you purchase through this link, at no extra cost to you. |
Manufacturer's specifications
- Victron MultiPlus-II 48/3000/35-50 (120 V): DC input voltage range 38 to 66 V; output 120 VAC ±2 % at 60 Hz; continuous output 3000 VA. (manufacturer's specification)
- Victron MultiPlus-II 48/3000/35-50 (120 V): continuous output power is 2400 W at 25 °C (77 °F), 2200 W at 40 °C (104 °F) and 1700 W at 65 °C (150 °F); peak power is 5500 W. (manufacturer's specification)
- Victron MultiPlus-II 48/3000/35-50 (120 V): maximum battery charge current 35 A (up to 25 °C / 75 °F ambient); absorption voltage 57.6 V and float voltage 55.2 V; transfer switch and maximum AC input current 50 A. (manufacturer's specification)
- Victron MultiPlus-II 48/3000/35-50 (120 V): maximum efficiency 95 %; zero-load power 11 W; operating temperature -40 to +60 °C (-40 to 140 °F) with fan-assisted cooling; protection category IP22. (manufacturer's specification)
- Victron MultiPlus-II (120 V): it has a VE.Bus communication port for parallel, split-phase and three-phase operation, remote monitoring and system integration; two units of the same model can be connected for a 240 V split-phase output. (manufacturer's specification)
- Victron Cerbo GX: Victron's manual describes the Cerbo GX MK2 as almost identical to the original Cerbo GX but with two VE.Can ports; the original Cerbo GX, which this build used, has one fully functional VE.Can port. The manual's specification table covers the current MK2 and MK3 models. (manufacturer's specification)
- Victron Cerbo GX MK2 (current model): supply voltage 8 to 70 V DC; two paralleled VE.Bus RJ45 sockets, three VE.Direct ports, Bluetooth, Ethernet and WiFi; operating temperature -20 to +50 °C; IP20. (manufacturer's specification)
- Victron GX Touch 50: 800 × 480 display, IP54 (without connectors), connected to the Cerbo GX with a 2 m cable. (manufacturer's specification)
- EG4 WallMount Indoor 280Ah battery: 51.2 V nominal, 280 Ah, 14.3 kWh total energy capacity at 25 °C and 100 % state of charge. (manufacturer's specification)
- EG4 WallMount Indoor 280Ah battery: maximum continuous charge current 140 A and maximum continuous discharge current 140 A; bulk/absorb charging voltage 56.0 V (±0.8 V) (the BMS column of the spec sheet; the sheet gives a separate recommended-setting column). (manufacturer's specification)
- EG4 WallMount Indoor 280Ah battery: charging range 0 °C to about 50 °C (32 to about 122 °F); discharging range -20 °C to about 55 °C (-4 to about 131 °F); storage range 0 °C to about 45 °C; ingress protection IP20; the internal heater turns on at or below 0 °C (32 °F) and off at 5 °C (41 °F). (manufacturer's specification)
- EG4 WallMount Indoor 280Ah battery: more than 8000 cycles (0.5C, 80 % depth of discharge); the spec sheet lists UL1973 and UL 9540A under certifications (we have not seen the certificates or test reports); RS485 and CAN communication ports; weight 286.6 lb (130 kg). (manufacturer's specification)
Firmware and version records
- Victron MultiPlus-II 48/3000: no firmware version recorded (The version was not noted at the time.)
- Victron Cerbo GX: no firmware version recorded (The version was not noted at the time.)
- EG4 WallMount Indoor Battery 280Ah: no firmware version recorded (The version was not noted at the time.)
What we did not test or check
- We did not take our own measurements of this system. The figures on this page are the manufacturers' published specifications, not our results.
- Whether loads and charge or discharge rates stayed within the limits of each part was not checked.
- Surge and motor-startup loads were not tested.
- Operation in heat or cold extremes was not tested.
- Voltage drop in the DC battery cables was not calculated or measured.
- Cable sizing, routing, terminations and torque were not checked against the manufacturers' instructions.
- The sizing and placement of the DC and AC fuses and breakers were not checked against the manufacturers' requirements or the electrical code.
- Grounding and bonding were not checked.
- Compatibility between the parts' firmware versions was not checked.
- Generator and grid-tie operation were not tested.
Videos that show this build
- Victron MultiPlus-II 48/3000 off grid system made easy with Cerbo GX and EG4 battery – System overview with Cerbo GX and EG4 battery
- How to build a Reliable Victron 240v Split Phase Off Grid system | #victron MultiPlus-II #eg4 – 240 V split-phase build
Important notice: our experience, not instructions
This page records one system that TGBATG built and used, on the date shown and with the parts and versions listed. It describes what we did, not what you should do. It is our experience only. It is not instructions, directions, a design, a plan, an inspection, a recommendation that you copy it, or engineering, electrical, safety or legal advice, and it creates no professional relationship between you and us.
Electrical systems differ in their loads, climate, wiring, local code and the exact parts and firmware used, and manufacturers change their products, specifications and instructions without notice. Parts listed here may be discontinued, replaced or revised. Your results will differ from ours.
Batteries and mains-voltage electricity can cause serious injury, electric shock, fire and death. Read and follow the manufacturers' instructions and warnings for every part, follow your local electrical code, obtain any permits that apply, and have the work done or inspected by a licensed electrician where required. Do not rely on this page to decide how to size, protect, wire, ground or configure any system.
We list above some things we did not test or check. Even for what we did test, we may have made mistakes or left things out. We cannot guarantee that this page is accurate, complete or current, or that it is suitable for your use. It is provided as is, without warranties of any kind. You use it at your own risk and, to the fullest extent the law allows, TGBATG and its owner are not responsible for any loss, damage or injury that results from using it.
Some links on this page are affiliate links: if you buy through them TGBATG may earn a commission at no extra cost to you. We list the parts we used whether or not we earn a commission on them.
If you find an error, please tell us at contactus@tgbatg.com.