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Rectangular metal inverter charger unit with terminal block and marine coated finish

Thinkstar

Thinkstar 4000W Pure Sine Inverter Charger 24Vdc 120Vac UL

SKU CH-KWT9-S6C79

Delivers 4000 W pure sine output from 24 V DC with 12000 W surge for 20 seconds and UL-listed safety

  • Pure sine output with 95% efficiency for clean power
  • 4000W continuous and 12000W surge for heavy loads
  • 24V DC input with 120V AC single-phase output
  • Listed to UL 458, 1741, 1012 and CSA 22.2 standards
  • 10ms transfer time with battery priority selector

4000 Watt Low Frequency Inverter Charger

This 4000 watt low frequency inverter charger converts 24 volt DC input to 120 volt AC single phase output. It is built for off grid, marine and backup power systems that require reliable AC from a battery bank. The unit carries listings to UL 458, UL 1741, UL 1012 and CSA 22.2 numbers 107.1 and 107.2.

Installation Notes And Common Pitfalls

The AC direct connect terminal block simplifies hardwired installation in fixed locations. Marine coated and protected construction resists corrosion in humid or salt air environments. Installers must verify battery bank voltage matches the 24 volt DC requirement and size cables for the 4000 watt continuous rating to avoid voltage drop.

Sustained Load Behaviour

Continuous output is rated at 4000 watts with a 300 percent surge capability delivering 12000 watts for 20 seconds. Output frequency holds at 50Hz or 60Hz within .3 Hz tolerance. Typical transfer time is 10 milliseconds maximum. Total harmonic distortion is rated at 95 percent efficiency under load.

How it compares

Measured against everything we stock in DC-to-AC Power Inverters, at today’s prices. Recalculated every night.

Price $1,899.99
Pricier than about 92% of the 866 comparable items (median $25.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the Thinkstar 4000W inverter is producing clean power after installation?

Measure the output with a true-RMS meter; it should read 120Vac at 60Hz ± .3Hz with THD below 5% and transfer to battery within 10ms typical.

What comes with the Thinkstar 4000W Pure Sine Inverter Charger and what must I source separately?

The unit includes the inverter-charger with AC direct-connect terminal block and battery-priority selector; you must supply 24Vdc batteries, DC cables, fuses and mounting hardware.

Which UL-listed Thinkstar 4000W model should I choose for a 24Vdc marine system needing 120Vac output?

This single 24Vdc-to-120Vac model carries UL 458, 1741, 1012 and CSA 22.2 No 107.1 & 107.2 listings, 4000W continuous and 12000W surge for 20 seconds.

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