LiTime 2000W 12V Pure Sine Wave Inverter with 20ms ATS

SVT Score, Lower

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4.1
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A 2,000 W, 12 V pure sine inverter with a built-in transfer switch that moves loads to battery within 20 ms of a grid failure, a wired LCD remote and hardwire AC terminals.

$221

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SKU: L12V2KW-INV-ATS-Z Category: Brand:

Usability

4.1 out of 10

At 2,000 W continuous it sits on the typical rung for a power inverter, so it scores 5 on capacity.

Better on capacityRenogy 3000W 12V InverterAt 3,000 W continuous it sits on the 7 rung for a power inverter. $414.99Scores 7.0

LiTime's spec table rates its efficiency at 90 percent or more, which meets the 89 percent rung but not the 91 percent one, and LiTime publishes no no-load draw, so read on efficiency alone it scores 4 on efficiency.

Better on efficiencyLiTime 2000W InverterLiTime's spec table gives its efficiency as 85 to 95 percent. $208.99Scores 10.0

Its 4,000 W surge is 2.0 times its continuous rating, the typical rung, so it scores 5 on operating range.

It has a built-in transfer switch that moves the loads to battery within 20 ms of a grid failure and a wired LCD remote, with hardwire AC terminals but no GFCI, search mode or parallel operation, so it scores 6 on features.

No certifier directory lists this unit (Intertek, UL, CSA, LabTest, TÜV, SGS), and LiTime's page and manual name no safety listing, so it scores 2 on verification.

Better on verificationRenogy 2000W 24V InverterIntertek's directory lists the RIV2420P2-12S to UL 458. $339.99Scores 8.0

LiTime's US and Canadian warranty policies and its product page give its 12 V 2000 W inverters a 2-year warranty, so it scores 3 on warranty and support.

Warranty and returns

LiTime sets warranty terms by product, for the original buyer only, with proof of purchase.

$221.34 at litime.com.

Grid passthrough with 20 ms switchover

The L12V2KW-INV-ATS-Z is LiTime's 2,000 W, 12 V pure sine wave inverter with a built-in automatic transfer switch, for RVs, trucks and home backup circuits that also take grid or shore power.

Verdict

It suits a buyer who wants an RV or backup circuit to fall over to a 12 V battery on its own when shore power drops, and who will not need the inverter to recharge that battery from the grid.

Strengths

  • Switches loads to battery within 20 ms of a grid failure
  • Grid input takes 90 to 144 V AC through its own breaker
  • Wired LCD remote shows wattsvolts and battery level
  • USB-C port rated up to 12 V 1.5 A beside a 5 V 2.4 A USB-A
  • 8.71 lb at 14.17 x 7.42 x 4.02 in

Drawbacks

  • Rated 90 percent efficiency or moreshort of the 91 percent rung
  • LiTime publishes no no-load draw
  • Does not charge the battery from grid power
  • No GFCIsearch mode or parallel operation
  • Two AC outlets

Social score

4.8 out of 10
RedditBrand-level4.0 out of 10

Reddit owners report problems more than praise with LiTime inverters. An r/OffGrid user's 12 V 3000 W inverter shut off at 1,200 W or more even with a leaf blower cooling it (April 2025), an r/SolarDIY owner's 48V 3500W inverter-charger cut out and restarted every 15 seconds charging from a generator until he lowered the charge limit to 10 A (November 2025), and an r/RVLiving owner's 3000 W inverter-charger stopped charging at 227.7 of 230 Ah, which he traced to a long extension cord (July 2025).

GoogleBrand-level4.0 out of 10

On DIY Solar Forum an owner's 24 V 3000 W all-in-one stopped PV charging after a month and later ran too hot to touch while switched off with panels connected (April 2025); a second owner on his replacement unit reports breaker trips on utility charging, menus he cannot reach and loads that stall on low settings (June 2025). In a marine thread an owner notes the newer 5000 W inverter-chargers carry an internal ground-switching relay (November 2025).

YouTube5.0 out of 10

Adventure Tech, which links LiTime's store through an affiliate link and passes on a LiTime discount code and is therefore not independent, walked through the new model's 20 ms transfer switch, grid bypass, remote display and outputs from the specifications, with no measurements and no long-term use (April 2026, about 790 views). No tester without a LiTime tie was found on this model.

Amazon6.0 out of 10

LiTime's Amazon US listing for this model (B0GV2J9WGS) reads 4.5 from 21 ratings, and a second LiTime listing of the same model (B0GV289L8R) reads 4.0 from 5 (October 2026). The star splits sit behind sign-in, and 26 ratings in all temper the score.

User reviewsNot scored

The retailer pool is blank: Walmart carries no rated listing of the 2000 W ATS inverter, and Home Depot, Lowe's and Best Buy carry no LiTime listing.

Trustpilot

Trustpilot rates LiTime 4.6 from 1,630 reviews on a claimed profile that LiTime pays Trustpilot to subscribe to (October 2026).

Track record
  • The BBB rates LiTime F on 4 complaints (October 2026).
  • No CPSC or Health Canada recall names LiTime or Ampere Time, searched in October 2026.
Not countedExcluded

Not counted in any pool: litime.com's own review widget, LiTime's YouTube channel and Facebook groups, or its affiliate and creator programs.

Brand-level

4.6 on Trustpilot, an F from the BBB, no recalls

Specs

  • CapacityNot applicable
  • AC Output2,000-2,999 W
  • System Voltage12 V
  • Panel PowerNot applicable
  • Charge CurrentNot applicable
  • Safety ListingNone verifiable
  • Cell TypeNot applicable
  • Low-Temp ChargingNot applicable
  • Warranty2 Years
  • MonitoringWired display or port only
  • Weight8.7 lb

At a glance

  • Hardwire L/N/G output block
  • Two 1.64 ft battery cables
  • 3.28 ft ground cable in box
  • Clip-on remote brackets

LiTime is the brand of Shenzhen Ampere Time Digital Energy Technology, founded in 2018 and renamed from Ampere Time in December 2022.

It sells direct from litime.com, which ships US orders from warehouses in Los Angeles and Dallas, and through its Amazon store and Walmart's marketplace.

The LiTime L12V2KW-INV-ATS-Z is a 12 V pure sine wave inverter rated 2,000 W continuous and 4,000 W peak surge, with 110-120 V AC output at 60 Hz (plus or minus 3 Hz), efficiency of 90 percent or more, a 10.5 V to 16.0 V DC input window, and low- and over-voltage protection at 10.5 V and 16.0 V. Its built-in automatic transfer switch takes grid or shore power at 90 to 144 V AC through its own AC input breaker, passes it straight to the loads while the grid is up, and switches the loads to battery within 20 ms when the grid fails; it does not charge the battery from the grid. The AC side has two AC outlets, a high-output L/N/G hardwire terminal block, a ground terminal, a 5 V 2.4 A USB-A port and a USB-C port rated 5 V 3 A, 9 V 2 A and 12 V 1.5 A; two temperature-controlled fans cool it, and it operates from -4°F to 104°F. It measures 14.17 x 7.42 x 4.02 in with its mounting feet (12.68 x 7.42 x 3.94 in without) and weighs 8.71 lb. The box holds two 1.64 ft (50 cm) battery cables, a 3.28 ft ground cable, the LCD remote with a 14.76 ft cable and two clip-on brackets, and screws and anchors for the remote and the inverter. LiTime publishes no no-load draw and names no GFCI, and its warranty policy and product page give it a 2-year warranty. It sells singly; LiTime's 2000 W 12 V inverter without the transfer switch is a separate product.

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