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Victron Energy, 12-volt inverter/charger

Victron MultiPlus-II 12/3000/120-50 (120 V)

Also written as MultiPlus-II 12/3000, PMP122305122

A 3,000 VA pure sine inverter and 120 A charger in one box, listed to UL 458, the RV and marine inverter standard.

Not yet available

Best for

An RV or van that wants 120 V outlets from the battery, shore-power charging and automatic switchover.

Photo pending: we only show images we own or are licensed to use.

Strengths and limitations

Strengths

  • 3,000 VA / 2,400 W continuous at 25 C, 120 V 60 Hz (Victron).
  • Charges the battery at up to 120 A from shore power or a generator (Victron).
  • Takes over loads in less than 20 ms when shore power drops (Battle Born, Victron dealer).
  • UL 458 listing; 5-year Victron warranty (Battle Born, Victron dealer).

Limitations

  • 42 lb and 22.8 x 10.9 x 5.8 in (Battle Born listing).
  • At 12 V, full output draws far more current than one 100 A battery supplies. Plan batteries in parallel and heavy cable.
  • Setup needs a Victron interface or dongle and the VictronConnect or VEConfigure software.

What it does not do

  • Charge from solar: pair it with a charge controller such as the SmartSolar MPPT.
  • Run 3,000 W: continuous output is 3,000 VA, which Victron rates at 2,400 W at 25 C.
  • Give 240 V: this is the single 120 V model.

Specifications

From the cited source on 2026-11-10. "Not verified" means no source we checked published it.

Continuous output 3,000 VA / 2,400 W at 25 C [2]
AC output 120 V +/- 2%, 60 Hz [2]
DC input 9.5 to 17 V [1]
Max charge current 120 A [2]
Transfer switch 50 A; under 20 ms switchover [1]
Listing UL 458 [1]
Size / weight 22.8 x 10.9 x 5.8 in / 42 lb [1]
Warranty 5 years [1]

Before you buy

  • Fuse the battery cables close to the battery and size them for the inverter's full draw.

Sources

  1. MultiPlus-II 12/3000/120-50 120V (UL 458), Battle Born Batteries (Victron dealer listing) (retailer), read 2026-11-10. Re-read 2026-11-10 (evening). Part PMP122305122, title lists UL 458; 120 V AC; takes over loads in less than 20 ms after shore or generator power drops; 5-year Victron warranty; spec table (search snippet): weight 42 lb, 22.8 x 10.9 x 5.8 in, M8 battery bolts. Price shown $1,006.40 (not printed on our site).
  2. MultiPlus-II 120V data sheet (dealer copy), Victron Energy (data sheet hosted by Solartown) (manufacturer), read 2026-11-10. 12/3000/120-50: continuous output 3,000 VA, 2,400 W at 25 C; 120 VAC +/- 2%, 60 Hz; absorption 14.4 V, float 13.8 V; max battery charge current 120 A.