Description
xVictron MultiPlus-II 12/4000/160-32 230V Inverter Charger
The Victron MultiPlus-II 12/4000/160-32 is a combined inverter and battery charger designed for 12V battery systems requiring 230V AC output. It is suited to off-grid installations, marine and vehicle applications, and backup power systems where a single, integrated unit is preferable to separate components. The 160A charger input and 32A transfer switch make it capable of handling substantial loads while managing battery charging from shore power or a generator.
Key Features
- 4000VA continuous inverter output at 230V AC from a 12V DC battery bank.
- 160A built-in battery charger with adaptive charge algorithm to suit a range of battery chemistries including lead-acid and lithium.
- 32A AC transfer switch for switching between shore/generator power and inverter output, with a transfer time of less than 20 milliseconds.
- PowerControl function limits the load on a generator or shore supply by reducing charger current when AC loads are high.
- PowerAssist function supplements shore or generator power with battery power during peak demand, allowing a smaller AC supply to handle larger loads.
- Two AC outputs: one with UPS functionality (no-break) and one that can be disconnected when running on battery to shed non-essential loads.
- Compatible with Victron VE.Bus for system integration, remote monitoring and configuration via GX devices and VictronConnect.
- Programmable relay for generator start/stop or alarm signalling.
Product Overview
The MultiPlus-II is the second generation of Victron's MultiPlus inverter charger range. Compared to the original MultiPlus, it adds a built-in current transformer for more accurate AC monitoring, an additional AC input for grid or generator connection management, and improved integration with Victron's GX ecosystem. The 12/4000/160-32 variant is the largest 12V model in the range, making it appropriate where a 12V battery bank is already specified but high inverter output and fast charging are required.
The 160A charger is significant in practice. At 12V, 160A equates to roughly 1920W of charging power, which allows a large battery bank to be recharged efficiently during generator run time. The adaptive four-stage charge algorithm (bulk, absorption, float, storage) helps extend battery life regardless of whether the bank is lead-acid AGM, gel or lithium iron phosphate. For lithium batteries, the unit must be configured correctly and used with a compatible BMS; Victron's own Smart Lithium batteries communicate directly via VE.Bus or a BMS interface.
PowerAssist is particularly useful in installations where the available shore or generator supply is limited. If the AC input is set to, say, 16A and the connected loads briefly exceed that, the MultiPlus-II draws the shortfall from the battery rather than tripping the supply breaker. This allows a modest generator or marina shore connection to support loads that would otherwise require a larger supply. The sub-20ms transfer time means most sensitive electronics, including computers and medical equipment, continue operating without interruption when switching between AC input and inverter.
Technical Specifications
| Parameter | Value |
| SKU | PMP122405010 |
| Battery Voltage | 12V DC |
| Inverter Output Power | 4000VA / 3500W continuous |
| AC Output Voltage | 230V AC |
| Battery Charger Current | 160A |
| AC Transfer Switch Current | 32A |
| AC Input Voltage Range | 230V AC (single phase) |
| Transfer Time | <20ms |
| Communication Interface | VE.Bus |
| Weight | 23.4 kg |
| GTIN | 8719076072058 |
Applications
- Off-grid cabins and remote buildings with 12V battery banks requiring 230V AC output.
- Marine vessels with 12V DC systems needing shore power integration and battery charging.
- Large motorhomes and expedition vehicles where high charger current reduces generator run time.
- Backup power systems for critical loads requiring near-instantaneous transfer from mains to inverter.
- Hybrid off-grid systems paired with a Victron GX device, solar charge controllers and a generator.
What Is Included
- Victron MultiPlus-II 12/4000/160-32 230V inverter charger unit.
Installation Notes
The MultiPlus-II 12/4000/160-32 handles high DC currents at 12V and must be installed by a qualified electrician or accredited installer. DC cable sizing, fusing and connection torque are critical at this current level; undersized cabling presents a serious fire risk. For any grid-connected or export application in the UK, G98 or G99 compliance requirements apply and the installation must be notified to the relevant Distribution Network Operator. When used with lithium batteries, a compatible BMS must be in place before commissioning. Configuration is carried out via VEConfigure or VictronConnect and should not be altered without understanding the implications for the connected battery and load.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.