Do the OL6KRTHW and OL6KRTHD deliver equivalent power capacity and output quality?

Both units are rated identically at 6 kVA output capacity and 6000 W true output power, with a unity output power factor (1.0) and an input power factor of 0.99. Neither model forces a capacity derating common with older 0.9 PF designs, meaning the full 6000 W is available to connected loads.

Waveform quality is identical on both: pure sine wave output at 50/60 Hz with a crest factor of 3:1 and output voltage Total Harmonic Distortion (THD) held to 5% or less. Both accept the same wide input voltage range of 120–280 V at 40–70 Hz input frequency, making either suitable for international or variable-grid environments without adjustment.

Which model provides better power conditioning and electromagnetic noise suppression?

This is the single substantive differentiator between the two SKUs in the provided specifications. The OL6KRTHD is listed as including EMI/RFI noise filtering (Yes), while the OL6KRTHW is listed without it (No). EMI/RFI filtering suppresses high-frequency conducted noise on both the input and output lines, which matters in environments where sensitive analog or RF equipment shares a power circuit, or where upstream utility or generator noise could affect load performance.

Audible noise is identical on both units at 65 dB, indicating equivalent fan and transformer acoustic output. Surge protection is present on both models. For installations where electromagnetic interference is a documented concern—such as broadcast, medical-adjacent, or industrial edge sites—the OL6KRTHD's listed filtering capability is a meaningful differentiator. In standard IT rack environments where EMI/RFI filtering is provided upstream or is not a load sensitivity requirement, this distinction carries less weight.

Are there form-factor or deployment differences that affect rack planning?

The product naming and SKU descriptions suggest a form-factor difference. The OL6KRTHW is designated '6U' in its product title, while the OL6KRTHD is described as '2U' in its product title. However, no rack unit (U-height) specification is explicitly listed in the structured spec fields provided for either model. Buyers should verify exact U-height, weight, and physical dimensions directly from CyberPower datasheets before finalizing rack layouts, particularly in high-density installations where vertical space is constrained.

The OL6KRTHD product title also references 'Hw/cord 200-240V Rmcard RT 3YR WTY,' suggesting it may ship with a hardwire cord and an included remote management card (RMCARD) and carries an explicitly stated 3-year warranty in the title. The OL6KRTHW title does not reference these inclusions. These bundle differences are not confirmed in the structured spec fields provided, so buyers should verify included accessories and warranty terms directly with CyberPower or the distributor before purchase.

Which should you choose: the OL6KRTHW or the OL6KRTHD?

Our take: The OL6KRTHD is the stronger choice when EMI/RFI noise filtering is a site requirement, when rack space is constrained (its title indicates a 2U profile versus the OL6KRTHW's 6U designation), or when a bundled remote management card and an explicit 3-year warranty term are decision factors. On core power specs, both units are identical: 6 kVA / 6000 W, PF=1, pure sine output, 5% THD, 65 dB noise, and 120–280 V wide-input range. The sole spec-field difference is EMI/RFI filtering: present on the OL6KRTHD, absent on the OL6KRTHW. The OL6KRTHW may be appropriate where rack depth is not a constraint, EMI filtering is handled elsewhere in the power chain, and a larger chassis footprint is acceptable. Confirm U-height, included accessories, and warranty terms directly from CyberPower before procurement.

Side-by-Side Comparison

Spec-for-spec, from manufacturer data.

Frequently Asked Questions

Related Resources

• CyberPower OL6KRTHW product page — full specs and to add to a quote
• CyberPower OL6KRTHD product page — full specs and to add to a quote