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The Victron Energy MultiPlus-II 12/3000/120 UL 458 pure sine wave inverter charger delivers 3000VA of 120V power with 20ms seamless transfer and Power Assist for $99.98 (down from $847.20) — buy online at PowerHaven Outpost for a massive discount on professional-grade off-grid power.
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Categories : Inverters
SKU : POW-INV-146
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Buy the Victron Energy MultiPlus-II 12/3000/120 120V (UL 458) pure sine wave inverter charger for $99.98 — dramatically reduced from the $847.20 compare-at price — at PowerHaven Outpost. Built for professional marine, RV, vehicle and off-grid applications, this 3000VA 12V inverter charger answers the top buyer questions about 2x120V output, split-phase capability and UL certification.
On 2x120V configurations, the unit's output is arranged as two 120V legs, enabling 120/240V split-phase setups — the configuration many 50A RV parks and North American homes use. Two MultiPlus-II units can also be paired in split-phase for 50A RV service, combining into a single 240V system while each supplies 120V loads.
Choose this model for single-leg 120V systems; pair two units if you need full split-phase 240V.
Yes — this version is UL 458 certified, the safety listing required for mobile and marine power equipment in North America, making it suitable for RV and vehicle installations.
Prevents overload of limited AC sources (generators, shore power) by boosting with inverter power when demand exceeds supply.
Grid or shore loss? The MultiPlus-II switches to inverter power within 20 milliseconds — fast enough that computers and electronics keep running.
Up to six units can run in parallel for higher output; three units can be configured for three-phase.
Compared to the original MultiPlus, the MultiPlus-II adds an integrated 50A transfer switch and dual AC inputs, simplifying installation. Compared to cheaperModified sine units, pure sine output protects sensitive electronics. Cheaper inverters don't combine charging, transfer and Power Assist in one UL-certified unit.
At $99.98 vs. $847.20 compare-at, you save $747.22 — an 88% discount. Stack coupon OUTPOST12 for 12% more off, and orders over $45 ship free.
UL 458 certified 3000VA 12V pure sine inverter charger with 120A charging — RV, marine and off-grid ready
20ms seamless transfer and Power Assist prevent overloads and keep loads running without interruption
Massive savings: $99.98 vs. $847.20 compare-at — save $747.22, plus 12% more with coupon OUTPOST12
Model: MultiPlus-II 12/3000/120 (120V, UL 458)
Series: MultiPlus-II
AC Output: 120V pure sine wave
Sale Price: $99.98 USD
Scalability: Up to 6 units parallel; 3-phase capable
Product Type: Pure Sine Wave Inverter Charger
Certification: UL 458
Transfer Time: ~20ms
Compare-At Price: $847.20 USD
Continuous Power: 3000VA
DC Battery Voltage: 12V
Battery Charger Current: 120A
Seller: PowerHaven Outpost
MPN: MultiPlus-II 12/3000/120 (120V, UL 458)
The MultiPlus-II combines a 3000VA pure sine inverter, 120A battery charger, 20ms transfer switch and Power Assist in one UL 458 certified unit for RV, marine and off-grid systems — at $99.98 instead of $847.20.
Vs. MultiPlus: integrated 50A transfer switch and dual AC inputs. Vs. budget inverters: pure sine output, UL certification, seamless 20ms transfer, and built-in charging — the affordable professional-grade deal.
2x120V refers to split-phase configurations with two 120V legs for 120/240V service. This 12/3000/120 single-output model provides one 120V leg; pair two MultiPlus-II units for full split-phase.
Yes — this version carries UL 458 certification, the listing required for mobile and marine power equipment in North America.
The single 120V model serves standard 30A RV, marine and off-grid loads; 2x120V split-phase setups pair units to create 240V/120V service for 50A RVs and homes.
$99.98 vs. an $847.20 compare-at price — you save $747.22 (about 88% off). Coupon code OUTPOST12 adds another 12% off.
At PowerHaven Outpost — order online with free shipping on orders over $45.00 and apply available coupons at checkout.
The 20ms switchover is real — my computers and CPAP don't even blink when shore power drops. Power Assist lets me run the microwave on a 30A hookup without tripping anything. This is professional-grade equipment at a fraction of list price.
Performance is superb: clean sine wave, fast transfer, and the VictronConnect app makes tuning easy. Be warned, it's heavy and the terminal wiring takes some planning. Have proper cables and fuses ready before it arrives.
Replaced a cheaper inverter that buzzed and cooked my drill battery charger. The MultiPlus-II is silent, pure sine, and charges my lithium bank fast when on shore power. Should have bought it years ago.
The hardware is excellent but the configuration options can overwhelm a first-timer. Took me a weekend of reading Victron docs to set up assistant functions correctly. Now that it's dialed in, it's flawless — just budget time for setup.
Runs our whole cabin: fridge, well pump, washer, and lights on 3000VA. Transfers from generator to inverter without a hiccup, and the UL 458 certification satisfied our county inspector. Genuine Victron at nearly 90% off is unreal.
