Free tools Windows power users keep installed
One-click scans. No signup required.
Pre-Switch says its AI-controlled soft-switching platform improves inverter efficiency by timing power-switch transitions to reduce the overlap of voltage and current that causes switching losses. The company has reported high efficiency figures for CleanWave reference inverters, but those results are tied to specific systems and test conditions; they are not a guarantee of performance in every inverter or vehicle.
How Pre-Switch’s soft-switching approach works
In a conventional hard-switched inverter, a power transistor turns on or off while voltage and current may still overlap across it. That overlap dissipates energy as heat. Pre-Switch uses forced-resonant soft switching: small auxiliary resonant transistors help create conditions for the main switches to change state with minimal voltage-current overlap.
An FPGA runs an adaptive algorithm that adjusts the timing of those auxiliary transistors. The AI element, as described for the platform, is this timing control; it is not a claim that the inverter independently learns how to drive a vehicle or manage the entire power system. The available descriptions do not specify the algorithm’s internal design.
Reducing switching losses can make higher switching frequency practical. Higher frequency can, in turn, support a cleaner motor-current waveform and reduce motor iron losses, and may allow smaller DC-link capacitors and output filters. These are potential system-level benefits, not automatic results: they depend on the converter, motor, operating conditions and design choices.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minute#1 Best Overall
- Unique Glass Cover Design: Tempered glass upper cover with big 6.25 inch LCD display and touchable buttons, cool look with high transparency, more clear to see real-time data of your inverter
- Powerful Inverter: 4000W rated and 8000W peak output. Please check the rated and peak power of your load, add up the watts used by all devices you think you'll run at the same time and see whether it is within the output power range of the inverter
- Stable and Efficient: Pure sine wave output, no interference, extends life of your devices, especially sensitive inductive appliances. Build-in 140A MPPT charge controller, max. PV 5600W 350VDC, max. conversion efficiency 98%
- Work without or with Battery: This power inverter can work without battery in daytime, use PV DC current to run the loads. While PV input voltage needs exceed 120V and grid is NOT connected, or it will consumes grid power inevitably. To reduce grid power consumption, we recommend connecting a battery. It works with most kinds of 24V batteries like AGM, Gel, Lead-acid, Lithium-ion and LiFePO4
- Hybrid Solar Inverter: This power inverter can configure charging and output priority of solar panels, battery or utility, allowing for energy storage and direct use, provides you sustainable power for off grid life, power outage, emergency
What the published CleanWave results show
The reported efficiency figures belong to named Pre-Switch reference systems. They should be read as company-reported results covered by trade publications, not as independent certification or a universal rating for the platform.
| Reported result | System and conditions stated | Attribution and qualification |
|---|---|---|
| 99.3% efficiency | Reported at 100 kHz; other test conditions not stated | Pre-Switch data reported by EE Times in 2021. The company CEO said the figure had an accuracy of 0.01%; the cited reporting does not establish independent verification. |
| 98.5% efficiency | CleanWave2 at 5% load; switching frequency and other test conditions not stated | Pre-Switch test result reported by Electronics360 in 2023; independent reproduction is not established. |
| 99.57% peak efficiency | CleanWave2 at 100 kHz; load and other test conditions not stated | Pre-Switch test result reported by Electronics360 in 2023; this is a peak figure, not an efficiency value across the operating range. |
| 90% or more reduction in total system switching losses | Double-pulse testing; the exact setup and comparison conditions are not stated here | Result reported by Power Electronics News in 2020. It concerns switching losses, not a 90% increase in overall inverter efficiency. |
The CleanWave200 reference hardware described in the 2020 report included a 200-kW inverter, Pre-Drive3 controller board, Pre-Flex FPGA and RPG resonant power-gate-driver board. That report also said the system enabled switching frequencies 4–5 times those of hard-switched IGBT systems and 35 times those of hard-switched SiC and GaN systems. The comparison is attributed to that report; baseline frequencies and full test conditions are not stated here.
Rank #2
- 【POWERFUL DC to AC CONVERTER】: This solar inverter delivers 2000W of continuous battery DC 12V to AC 110V 120V power and up to 4000W of peak surge power when the load is started. The 12V inverter has a conversion efficiency of greater than 93% during normal working and low no-load losses
- 【PURE SINE WAVE INVERTER】: The power inverter output waveform is consistent with the AC waveform of the utility grid and is suitable for inductive and capacitive loads. It extends the service life of the equipment and reduces the fault rate. Can be used with electrical equipment such as televisions, home theaters and other sensitive loads for a long time
- 【INTELLIGENT LCD DISPLAY】: This 2000Watt inverter comes with a high-brightness real-time smart screen that simultaneously displays input and output voltages, battery and load status, multiple operating conditions for timely troubleshooting. At the same time, the output voltage and screen can be adjusted independently in a small range
- 【POWER YOUR EXPECTATIONS】: The inverter 12V to 110V features dual AC socket, 20A Outlet, 5V2.1A USB port, Hardwire Port and remote controller with 23Ft Cable. This solar inverter is ideal when you need energy for off-grid, outdoors, RV, trucks
- 【MULTIPLE SAFETY PROTECTIONS】: Pure sine wave inverter provides undervoltage, overvoltage protection, overload, over temperature protection, short circuit and reverse connection protection. Aluminum and sturdy plastic housing ensures long term use
Does 99.3% mean every inverter reaches that efficiency?
No. The 99.3% figure is a Pre-Switch-reported result at 100 kHz, not a universal efficiency specification. Efficiency varies with load and temperature, and a peak result says little by itself about performance across a vehicle’s drive cycle or a converter’s full operating range. The 2023 report’s 98.5% result at 5% load is a separate CleanWave2 measurement, and should not be combined with the 99.3% figure as though both describe one test curve.
To evaluate a claimed inverter efficiency, look for the tested hardware and semiconductor type, switching frequency, load and temperature range, measurement method, and whether results have been independently reproduced. A single peak value cannot answer how the unit performs under real operating conditions.
Rank #3
- All-in-one Inverter Charger: Not only a power inverter with 3600 watt rated/7200 watt peak power, but with built-in 120A MPPT solar charge controller, and 100A AC battery charger. PV input voltage range 60V-500VDC, Max. PV input power 4200w, 16A
- Pure Sine Wave Inverter: Stable grid-like output 110V/120VAC, no interference with clear signals, can be used for general household appliances and certain sensitive inductive electronic devices within its power range
- Work with or without Battery: This DC 24V to AC 110V inverter works with most kinds of 24V batteries like AGM, Gel, Lead-acid, Lithium-ion and LiFePO4. It also can work without battery, uses pv power to run loads, while pv input voltage needs exceed 120V and grid is NOT connected, or it will consumes grid power inevitably. To reduce grid power consumption, we recommend connecting a battery
- Hybrid Solar Inverter: This power inverter can configure charging and output priority of solar panels, battery or utility, allowing for energy storage and direct use, great for household, workshop, power outage, emergency back up
- Easy Setting and Monitoring: This inverter has a LCD display, indicating the operating status and input/output information, allowing you to set parameters like battery charging current. Module for remote monitoring is optional, sold separately
Could soft switching extend EV range?
Pre-Switch has claimed up to 12% improvement in EV range, as reported by Power Electronics News in 2021. That is a company claim, not a universal or independently established range increase. The report details available here do not specify a vehicle, route, baseline inverter, or test protocol, so the percentage should not be treated as a prediction for a particular car.
The proposed rationale is that reducing inverter switching losses and improving motor operation at higher switching frequency can reduce energy lost in the powertrain. But vehicle range depends on the whole vehicle and driving conditions. An inverter-level efficiency result alone does not establish a matching percentage gain in range.
Rank #4
- 【𝟑𝟎𝟎𝟎 𝐖𝐚𝐭𝐭 𝐈𝐧𝐯𝐞𝐫𝐭𝐞𝐫】--- This pure sine wave inverter can provide 3000W continuous clean DC to AC power (6000W surge) with >91% efficiency, which strongly and effectively reduces conversion loss and protecting sensitive electronics (Microwave Oven, Laptops, CPAPs, LEDs) from damage. Handles heavy startups (Coffee Machine, Window AC, Power Tools) effortlessly. For RV, Home, Solar, Emergencies.
- 【𝐏𝐨𝐰𝐞𝐫 𝐈𝐧𝐯𝐞𝐫𝐭𝐞𝐫 𝐏𝐮𝐫𝐞 𝐒𝐢𝐧𝐞 𝐖𝐚𝐯𝐞】--- LANDERPOW inverter delivers the same as grid-quality Pure Sine Wave AC power, outperforming modified sine wave units. Safely powers inductive/capacitive loads (Window ACs, Coffee Machines, Refrigerators, Home Theaters, Car Audio) with zero hum/flicker. Protects sensitive electronics, extends lifespan, and cuts failure risks—ideal for long-term use.
- 【𝟑 𝐀𝐂 𝐎𝐮𝐭𝐥𝐞𝐭𝐬+𝐅𝐚𝐬𝐭 𝐂𝐡𝐚𝐫𝐠𝐢𝐧𝐠 𝐔𝐒𝐁/𝐔𝐒𝐁-𝐂+𝐇𝐚𝐫𝐝𝐰𝐢𝐫𝐞𝐝 𝐀𝐂 𝐓𝐞𝐫𝐦𝐢𝐧𝐚𝐥】--- This All-in-One Power Inverter features 3 AC Outlets + 1 Hardwired Terminal for high current electrical appliances/tools, plus 5V/3.1A USB & 30W PD ports for fast device charging. Multi-interface flexibility powers RV trips, job sites, and emergencies with pro-grade reliability. The plug-and-play design is very user-friendly.
- 【𝐇𝐢𝐠𝐡 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝟏𝐀𝐖𝐆 𝗣𝘂𝗿𝗲 𝗖𝗼𝗽𝗽𝗲𝗿 𝐁𝐚𝐭𝐭𝐞𝐫𝐲 𝐂𝐚𝐛𝐥𝐞𝐬】--- The LANDERPOW inverter 12V to 110V comes with two 1AWG/2 FT high-quality thickened pure copper battery cables, which can effectively protect the safety of the inverter during use. It is not easy to get hot during use and the conversion efficiency is higher.
- 【𝐒𝐦𝐚𝐫𝐭 𝐋𝐄𝐃 𝐒𝐜𝐫𝐞𝐞𝐧 𝐑𝐞𝐦𝐨𝐭𝐞 𝐂𝐨𝐧𝐭𝐫𝐨𝐥】--- LANDERPOW 3000 watt inverter comes with 15ft wired remote controller. The remote has smart LED screen to track battery levels, output, and errors in real time—no more guesswork, enables you timely battery swaps & power control. One-touch shutdown/restart design thrives in trucks, RVs, and job sites. Real-time Monitor from your cab or campsite.
Where the technology may be useful—and what to compare
The strongest documented application is EV traction. The platform is also identified for DC/AC and AC/DC converters, renewable-energy power conversion and industrial systems; aviation motors are described as a potential use. These applications have different power, cooling, reliability and certification requirements, so an EV reference result should not be assumed to transfer directly.
When comparing a soft-switched inverter with a conventional one, assess the complete system rather than efficiency alone:
- Efficiency across operating conditions: compare load and temperature curves, not only peak numbers.
- Switching design: identify hard-switching versus resonant operation, switching frequency, and the semiconductor type—SiC, GaN or IGBT.
- Electrical behavior: examine EMI, voltage slew rate (dV/dt) and the effect on the motor and its insulation.
- System size and power density: check whether higher frequency actually reduces filter, capacitor, cooling or enclosure requirements in the target design.
- Complexity and cost: account for auxiliary switches, control electronics and gate-driver components as well as any reduction in semiconductor count or cooling burden.
- Evidence quality: distinguish vendor-reported measurements from independently reproduced tests, and confirm that compared results use equivalent conditions.
What the evidence supports
Pre-Switch’s central engineering proposition is that adaptive resonant timing can reduce switching losses enough to make much higher-frequency inverter operation practical. Its trade-publication-reported CleanWave results provide examples of high efficiency and reduced switching losses, but the available figures do not establish a universal advantage over other inverter designs or confirm the claimed EV-range improvement independently.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
