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A 2000W pure sine inverter handles almost anything you'd want in a van — induction cooktop, hair dryer, power tools, espresso machine. But at 12V, it draws over 180A at full load. That's a lot of current and it dictates your entire cable and fuse setup.
The inverter market in 2026 comes down to a few solid picks. Victron Phoenix 12/2000: best quality, 8-12W no-load draw, VE.Direct integration, ~$500-600. Giandel 2000W: budget king, 18-22W no-load, perfectly adequate for occasional use, ~$150-180. AIMS Power 2000W: good middle ground, 15W idle, strong surge rating (4000W), ~$250-300. Victron MultiPlus 12/2000: inverter + charger + transfer switch in one, ~$700-800 but replaces three devices.
⚡ Expert tip
Mount your inverter within 1 meter of the battery and use the shortest, fattest cables you can. Every extra meter of cable at 180A+ creates voltage drop, heat, and wasted energy. Some builders mount the inverter directly on top of the battery box — ugly but electrically optimal.
Example calculation for your setup
Results based on a typical use case
| Appliance | Power | Usage/day | Wh/day |
|---|---|---|---|
| Compression fridge | 45W | 24h | 1080 |
| LED lighting | 20W | 4h | 80 |
| Water pump | 30W | 0.5h | 15 |
| Phone charging | 15W | 2h | 30 |
| Daily consumption | 1205 Wh | ||
Recommended inverter
No 220V appliances — no inverter needed
Adjust these values with the calculator below
VANPOWERCALC PROYOUR ENERGY PROFILE
YOUR ENERGY PROFILE.
This document contains the sizing of your future electrical installation, calculated based on your appliances.
Minimum Daily Consumption
0 WH / DAY
Inventory:
SYSTEM SIZINGPage 2
Battery
To guarantee 0WH without damaging your bank (80% max discharge):
0 AH
LiFePO4 12V
Solar
Minimum power required to recharge your consumption:
0 W
via MPPT
220V AC
Maximum power (with 25% safety margin).
0 W
No Need
Safety & CablingPage 3
12V Cable Sizing Guide
Use this professional reference table to select the correct gauge (mm²) for your cables. For 12V in a van, the maximum tolerated voltage drop is 3%. Always use multi-stranded flexible automotive wire.
| Current (A) | Round trip < 2m | Round trip 4m | Round trip 6m |
|---|---|---|---|
| 5A (LEDs, USB) | 1.5 mm² | 2.5 mm² | 4 mm² |
| 10A (Fridge, Pump) | 2.5 mm² | 4 mm² | 6 mm² |
| 20A (Heater) | 4 mm² | 10 mm² | 10 mm² |
| 50A (DC/DC Booster) | 10 mm² | 16 mm² | 25 mm² |
| 100A (Inverter) | 25 mm² | 35 mm² | 50 mm² |
Fuse Sizing
The fuse protects the wire, not the appliance. Always place it as close to the power source as possible (battery or busbar).
- Wire 1.5 mm² → Max fuse 10A
- Wire 2.5 mm² → Max fuse 20A
- Wire 4 mm² → Max fuse 30A
- Wire 6 mm² → Max fuse 40A
- Wire 10 mm² → Max fuse 60A
SCHÉMA ÉLECTRIQUE
PANNEAUX SOLAIRES
0W
REGULATEUR MPPT
BATTERIE AUXILIAIRE
0 Ah
Lithium LiFePO4
FUSIBLE
FUSIBLE
BOÎTE À FUSIBLES 12V
Pompe, Leds, Frigo...
CONVERTISSEUR 220V
NON REQUI
PRO GEARPage 4
SHOPPING LIST
Where to find this equipment? Here is the community-approved selection.
12V 6-way Fuse Box
Mandatory protection
Digital Multimeter
Test your connections
Heavy Duty Crimping Tool
For perfect lugs
Heat Shrink Tubing
Insulation and safety
GENERATED BY VANPOWERCALC PRO - UNLIMITED.
About this tool
Here's what caught me off guard on my first 2000W install: the cable sizing. At full load, 2000W through a 90% efficient inverter draws 185A at 12V. You need 50mm² (1/0 AWG) cable minimum for runs under 1.5m, and a 250-300A ANL fuse. I see builds on Instagram with 10mm² cable on a 2000W inverter — that wire would literally melt under sustained load. The other thing: no-load draw matters more than you think. A cheap inverter idling at 25W costs you 600Wh per day — that's half a small battery bank gone just to keep the inverter ready. If you don't need AC power 24/7, install a remote on/off switch and kill the inverter when it's not in use. The Victron's 8W idle draw is less painful but still adds up to 192Wh/day.
Frequently asked questions
Do I need a 2000W or 3000W inverter?▼
2000W covers 95% of van use cases: induction at 1500W, hair dryer at 1800W, power tools at 1500W. You'd only need 3000W for running multiple high-draw appliances simultaneously, which rarely happens in a van. Save the money — a quality 2000W beats a cheap 3000W every time.
What cable size for a 2000W inverter?▼
50mm² (1/0 AWG) minimum for cable runs under 1.5m. For longer runs, go to 70mm² (2/0 AWG). Fuse it with a 250-300A ANL fuse within 30cm of the battery. This is non-negotiable — undersized cables at these currents are a fire hazard.
How much battery does a 2000W inverter use when idle?▼
Depends on the model. Victron Phoenix: 8-12W idle (96-144Wh/day). Budget brands: 18-30W idle (216-360Wh/day). That idle draw runs 24/7 if you leave the inverter on. Install a remote switch or disconnect when not needed.
Pure sine or modified sine for a van?▼
Pure sine, always in 2026. Modified sine can damage sensitive electronics (laptop chargers, CPAP machines, induction cooktops) and makes motors run hotter and noisier. The price gap has shrunk — a decent pure sine 2000W is $150-200, not worth the risk of saving $50 on modified.
Can my battery handle a 2000W inverter?▼
At full load: 2000W / 12V / 0.9 efficiency = 185A draw. A 200Ah LiFePO4 can deliver this (most have a 200A continuous BMS), but you'll drain it in about an hour at max power. For sustained heavy loads, 300Ah+ is more comfortable. For short bursts (coffee maker, blender), 100Ah works fine.
Recommended gear
Pure Sine Wave Inverter 1000WPure sine wave, sensitive devices compatible, 12V→110V/230V.View on Amazon →Editor's PickLiFePO4 Battery 100Ah100% usable capacity, 3000+ cycles, built-in BMS.View on Amazon →Electrical Crimping ToolReliable crimp connections on 0.5mm²–16mm² cables, no soldering.View on Amazon →