3000w Inverter Charger vs 2000w Inverter  Charger

3000w Inverter Charger vs 2000w Inverter Charger

renogys blog Apr 14th 2022

Almost every trailer, motorhome, and other camping vehicle have an inverter charger.

When you attach an inverter charger into an AC input like a generator, it usually has an installed transfer relay that detects it. When the inverter charger detects AC, it acts as a flow-through, allowing you to power your gadgets from the AC source while simultaneously charging the batteries if needed.

When the inverter charger senses a loss of AC, it switches to DC mode, allowing you to use the battery packs that the power inverter charger has been charging to run your devices.

The charger in an inverter charger creates a huge inductive load (under 8kW). Chargers with a more significant "power factor" are preferred since they are least vulnerable to extreme energy using less AC power. A generator should be almost twice the charger's energy consumption.

Since inverter chargers consume a lot of currents and can create dead snags and fire hazards if improperly connected, they should be fitted by an expert. They form an essential element of your solar power system and can quickly recharge battery banks with capacities ranging from 400 to 800Ah.

Many trawler operators opt for a more powerful inverter charger for their AC appliances, supplemented by propane ranges and DC refrigeration systems, rather than a large diesel generator.

What is an Inverter Charger?

In its most basic form, a power inverter is a device that you connect with your solar panels. Its purpose is to transform low-voltage DC electricity into conventional residential AC power. This enables you to use the electricity generated by your home solar panel kits or boat's batteries to run domestic appliances and electrical devices.

Inverter chargers function similarly to traditional chargers, but they also contain robust battery chargers, battery monitoring, and remote controls.

They usually feature an automated transfer switch which switches when they detect another generation of AC power.

The inverter charger will revert to inverting status once removed from the AC power source.

Solar panels are frequently used to charge batteries in off-grid solar systems. When the days are short, solar energy alone wouldn't be enough to recharge the battery in the cold season. In these situations, you can utilize an AC generator to maintain the battery charge. An inverter will convert the AC power from the generator to DC power.

An off-grid inverter charger converts electricity on both ends, from AC to DC to recharge the batteries from the AC generator and from DC to AC for your electronics.

Most inverter chargers can even run a generator autonomously if the batteries' charge level drops too low.

Types of Inverter Chargers

There are two major types of inverter chargers:

  • Pure sine wave inverter chargers.
  • Modified sine wave inverter chargers.

What Size Inverter Chargers Do I Need?

Before purchasing an inverter charger, determine what size inverter charger you want so that you may get a device that supports a wide range of appliances.

Watts are the unit of measurement for power inverters. It must be capable of running the AC components attached to it at any given moment.

You should install an inverter charger with a rating that is roughly 25% greater than the most power-hungry device you want to install.

Assume you have a 240-watt slow cooker, a 200-watt blender, and a 300-watt television.

To operate them simultaneously, the camper's electrical system requires a significantly larger inverter than if you only use one at a time.

What to Look for When Purchasing an Inverter Charger

Even after you've estimated the required size, you should consider other elements of the product's specification and functionality before choosing your final selection.

Range of Input Voltage

If you're a frequent traveler, select an input voltage that corresponds to where you'll be spending most of your time.

Output Voltage

This is the current that the battery charger will deliver to the battery. A 12v battery bank is found in most RV and camper electronic wiring. Purchase an inverter charger with an output power that matches the voltage of your battery bank.

Efficiency Rating

This is the inverter charger's total efficiency. An inverter rated at 90% efficiency consumes 10% more power than the unit it powers.

The higher the efficacy rating, the less heat the component produces while in use and the lower the current wastage.

It will drain less power from the connect-up point if it has a better efficiency rating.

Some campsites restrict the power the camper may use from their power systems hook-up points, which is particularly significant in these circumstances.

Assume the campground's AC connection point is limited to 25 amps. On your primary supply circuit, this must provide your RV inverter charger and all AC appliances.

If an RV inverter charger uses 7 amps, you'll have 18 amps left over for your TV, air conditioner, and other appliances.

If you take any more, the breakers will fall, and you will lose power.

If the hook-up connection point is locked, you'll need to contact the campground personnel to unlock it and reset the trip switch.

A less effective inverter charger may require 8 or even 9 amps, decreasing the amount of AC accessible before tripping.

A control panel is available on some inverter chargers, such as Renogy's 3000W inverter charger. This enables you to restrict the amount of power drawn from the connection. Any linked appliances are given priority, with the leftover current charging the battery. This eliminates the possibility of tripping.

Maximum Charge Current

This is the highest amp that the device can produce. It's the inverter charger size determined by your battery packs and load. This must be large enough to fulfill your requirements.

Charging Algorithm

The charging algorithm indicates the number of phases in the battery system.

Battery Compatibility

Most inverter chargers, though not all, are interoperable with AGM, lithium, and Gel batteries, but check before purchasing.

Transfer Switch

This handy function is available on several inverter chargers. If the mains' power fails, they immediately switch to another AC source.

Continuous Power

A 1000w inverter charger can give a constant voltage of 1000w, which means it can deliver this much power as long as the DC power is adequate.

Power Rating

The component may also generate a higher power surge in brief bursts related to the inverter function.

This is particularly handy for equipment like compressor refrigerators that require a power spike to start up.

They require a massive power boost to begin running.

The peak energy score of an inverter charger is frequently higher than the constant power rating.

For any peak demand, check the appliance's parameters.

Power Quality

The term "power quality" relates to the current and resonance stability. An inverter with poor power quality may produce a harsh voltage waveform. In a high-power generator, such as those present in an electric fan or vacuum pump, this instability will result in severe jerking and rattling.

Insensitive electrical appliances, and poor power quality is an issue. It has the potential to fry out circuits in smartphones' motherboards. High power quality is required if smart gadgets or medical equipment are to be plugged into the inverter.

Safety Features

Inverter chargers include built-in safety mechanisms that provide further peace of mind and preserve the van's electrical system.

They differ from product to product, but here's a rundown of the most frequent ones:

  • High-speed ventilation fans to maintain the inverter at a cool temperature.

What is the difference between a 2000 watt and 3000-watt inverter charger?

The only difference between a 3000W and 2000W inverter charger is their size. A 3000W inverter charge will power more loads compared to a 2000W inverter charger.

The maximum and continuous loads will decide the size of the inverter. The size of the battery will only tell you how long the inverter can draw that load before it drains the battery. There is no direct link between the two.

If all other factors are the same, choose the 300W inverter. At a specific load, a bigger inverter will often operate quieter. (And, then, you have the additional power if you require it.)

The only disadvantage of the bigger unit is that it may require an additional 500ma of current while idle and on without a load (which isn't a big deal).

How many amps does a 2000w inverter draw

With excellent ventilation, a 2,000-watt inverter charger may draw a constant current of around 83 amps (2,000W) at full load.

For a microsecond, it can draw a surge current of roughly 186 amps which is often double the continuous current.

This can occur when it's linked to huge inductive loads like motors or large refrigerators.

It's worth mentioning that the inverter charger can take up to 1.5 amps (36 W) even when no load is attached, based on its reliability.

Check the detailed specs section of a given inverter charger type for correct figures of continuous, burst, and no-load power.

How many amps does a 3000w inverter draw?

Inverters exist in various sizes, but they all perform the same task in a solar power system; convert direct current to alternating current, which AC appliances and gadgets can then use. But how much current does a  3000-watt inverter draw? Is your inverter big enough to handle your system's amps? Or do you need to invest in a more robust system?

When a source is connected to an inverter, it begins to draw amps. Use the below formula to calculate the amps:

Amps drawn = watt load / input voltage / inverter efficiency

For example, a 3000W inverter on a 230V load with an 85% efficiency will draw 15.3 amps

What can a 2000 watt pure sine wave inverter run?

If the power supply output of a  2,000W inverter is not maxed, it may be utilized as a power backup solution in the house, camper, or RV for utilities such as lights, freezer, computers, DVD player, camera, and other devices.

If you're using the inverter to run several gadgets, ensure the overall load doesn't surpass the inverter charger's continuous and peak power ratings.

To prevent inverter damage, only connect appliances that consume up to 80% of the inverter's maximum power rating.

To minimize inverter damage, only load up to 1,600W if it is classed at 2,000W. A few inverters can offer maximum output for a limited amount of time!

Tweak the number of devices and their operating voltage, then examine the total appliance load to understand which appliances may be linked to an inverter depending on its power rating.

What can a 3000-watt pure sine wave inverter run?

The 3000W inverter has a steady power output of 3000 watts and a peak power output of 6000 watts, making it ideal for 12V automobiles, cabins, Caravans, and off-grid installations. This 3000W inverter supports a single heavy load of 3000 watts in an aviation socket.

A 3000-watts inverter supports DC input voltages of 12V/24V/48V/86V/110V and AC output voltages of 120V/230V and 50hz or 60hz. The 3000W inverter can operate at full load for extended periods while also providing power protection.

For the best 3000W inverter charger in the market, try Renogy's 12V Pure Sine Wave Inverter Charger w/ LCD Display. This inverter is compatible with most batteries, and it's also programmable to fit custom batteries.

Renogy's 3000W inverter also has a 90% efficiency, a surge power of 9000W, and a four-stage battery charging system to ensure your battery charges 100% every time.

It also has a grid equivalent to AC power to protect your appliances from frying out.

With Renogy's 300W inverter charge, you can rest easy knowing you can power all through when you are off-grid and indoors. This inverter is unrivaled in the market and is even more affordable than other less efficient inverters.

What size do I need for my camper inverter?

First, you’ll need to determine which items you want to power simultaneously, since this will help you calculate the size of camper inverter you’ll need. Begin by listing all of the electronics in your RV and adding the watts required. You should consider the operating watts as well as the surge requirements, as some appliances have high surges when they first startup. Once you’ve calculated the number of watts you’ll need to power (including the surges) , add 20%. This will tell you the minimum size camper inverter you’ll need to power your devices. 

You can easily estimate the size camper power inverter you’ll need by adding up the largest number of watts you’ll be using at a given time and adding 20%. Assume you require 1,500 watts to power your PC and microwave at the same time. 1500 Plus 300 (which is 20% of 1500) equals 1800 watts. This implies you'll need a camper power inverter with at least 2000 watts. The most frequent size used in RVs is a 2000 watt or 3000 watt unit.


A 3000W inverter charger is the best option if you are looking for a reliable solution. You might not have the appliances to fully utilize all the power that a 3000W inverter charger produces, but you never know when you will need it.

Furthermore, a high efficiency, high wattage inverter lasts longer since it works quieter and colder when connected with loads that are not equivalent to its wattage.

See other related articles below to learn more:

Solar Panels 101: A Beginner's Guide

The Ultimate Guide To DIY Off-Grid Solar Systems

How many watts to run a house

Do solar panels increase home value

how efficient are solar panels

How long do solar panels last

How Many Solar Panels Do I Need