Energy Aperture

Value chain · CLM-0181

In plain terms

The 9.4-cents and 3.8-cents per kWh figures both depend on launch prices that do not exist yet - they are extrapolated 10 and 20 years into the future from a historical cost-decline trend, using SpaceX's not-yet-finalised Starship costs and a design still based on today's Falcon 9 hardware costs.

The claim as recorded

The paper's launch cost model is built from "the format proposed by SpaceX for Starship" GEO transport (LEO insertion, refuel, transfer to GTO, transfer to GEO), with flight hardware costs based on "the current Falcon 9 upper stage," then reduced by "a logarithmic fit to historic launch cost data" projected forward 10 years (for the "middle" case) or 20 years (for the "asymptotic" case) to derive the launch costs feeding the LCOE figures in CLM-0179.

Scope and limits

No explicit $/kg figure is stated in the extracted text for this model (unlike SRC-021's and SRC-078's explicit per-kg figures) - this claim describes the METHOD, not a specific number, and should not be read as providing a $/kg data point for cross-source comparison.

What it assumes

Historic launch-cost decline trends continue linearly (in log space) for 10-20 more years; Starship achieves the cost structure SpaceX has proposed for GEO transport.

Where it comes from

SRC-006 Space solar power generation: A viable system proposal and technoeconomic analysis, 2025
"Launch costs were projected off of the format proposed by SpaceX for Starship GEO transport... The model projects the cost of flight hardware based on the current Falcon 9 upper stage. Launch cost prices were then reduced by a factor based on a logarithmic fit to historic launch cost data and projecting it forward the relevant number of years: 10 for middle and 20 for asymptotic." (PDF p.11-12).

Basis: USD, forecast basis, per kg not separately stated in body text extract (cost embedded in LCOE model)

Related records
Answers question
QST-003 not published in this release

Cite this

energyaperture.com/c/clm-0181

CLM-0181, Energy Aperture, as of 2025-06.

Connected records

Other published records linked to this one. A list, not a judgement.

Also from SRC-006
CLM-0179This 2025 paper's own numbers show that with today's technology, their space solar power design would cost about $7.78 per kWh - far more...
CLM-0180The low headline cost figure in this paper depends on using a very low 2% discount rate borrowed from a US home-energy-efficiency...
CLM-0296A 2025 peer-reviewed study from Caltech modelled its own space solar power design and calculated three costs of electricity: about 778 US...
CLM-0297The low electricity costs in a 2025 Caltech study rest on two assumptions among others. First, it assumes that SpaceX's Starship will in...
CLM-0670Caltech has two different space-solar-power efforts. One is a paper design that assumes a normal rocket-fuel-based trip to a high orbit...
CLM-1201Caltech's design has no single large structure. Many separate square craft, each 60 metres across, fly side by side in geostationary orbit...
CLM-1203Caltech's receiving station on the ground is a circle about 1.6 kilometres across, just large enough to catch the whole central spot of the...