PV Panels: Difference between revisions
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*$500/kg - [https://www.alibaba.com/product-detail/High-purity-99-999-metal-B_1125504514.html?spm=a2700.7724838.2017115.9.ccfdd3987VVLIx&s=p] | *$500/kg - [https://www.alibaba.com/product-detail/High-purity-99-999-metal-B_1125504514.html?spm=a2700.7724838.2017115.9.ccfdd3987VVLIx&s=p] | ||
*[[Borax]] - 25 cents/lb | *[[Borax]] - 25 cents/lb | ||
=Sourcing= | |||
*Wanxiang 230 Watt 60 Cells Poly Silver Frame UL. 16 of these would be 3680W. [https://mail.google.com/mail/u/0/#search/sunelec/FMfcgzGkZtClCCqzKmCJLpQlWLtHcvCQ?projector=1&messagePartId=0.1]. Company - [https://www.wanxiang.com/universalsolar_US.pdf]. Panel specs - [https://www.enfsolar.com/pv/panel-datasheet/crystalline/39433?utm_source=ENF&utm_medium=panel_more_series&utm_campaign=enquiry_product_directory&utm_content=100331]. The site shows panels as low as 20 cents. Is there a USA source at similar cost? | |||
**$14720 for 200 | |||
=Materials Cost= | |||
Latest revision as of 18:32, 9 December 2024
How They are Made
How is Silicon Produced
- Carbothermal reduction - Si02 is heated with Carbon (charcoal) in an arc furnace to produce metallurgical grade (impure) silicon
- This silicon can be drawn into a round billet from a melt
- Metallurgical grade silicon is purified to solar grade silicon (not as pure as semiconductor grade) by zone refining in vaccuum [1]
- This is an induction heater traveling up a billet of silicon
- Vaccuum sucks out light impurities
- Heavy impurities are travel up the melt zone as melt zone travels up the billet
Phosphorus
- If a PV panel, 285W, weighs 19 kg and maybe 1.5 kg silicon - [5] - then .2 ppm -> then 0.3 mg of phosphine per panel. If a bottle of phosphine contains 10 kg phosphine, then one bottle is sufficient for - 30,000,000 panels! Thus, phosphine costs per panel are negligible - 0.002 cent per panel. This may be reduced for inefficiency of diffusion - but still likely to be way under 1 cent per panel.
- $5/lb - [6]
Boron
Sourcing
- Wanxiang 230 Watt 60 Cells Poly Silver Frame UL. 16 of these would be 3680W. [10]. Company - [11]. Panel specs - [12]. The site shows panels as low as 20 cents. Is there a USA source at similar cost?
- $14720 for 200