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h1. Relais Autonome

Issue #60

h2. Données

* panneaux PV EUR/W m2/W

** autour de 1 a 2 EUR/W, fortes baisses http://solarbuzz.com/facts-and-figures/retail-price-environment/module-prices

** poly

** mono 1.2 m2 pour 175W 145W/m2

** amorphe 1.3 m2 pour 90W 70W/m2

* batterie Wh/kg EUR/Wh

** plomb acide

*** 22 EUR 12V12Ah = 144Wh 0.15 EUR/Wh 36 Wh/kg Caractéristiques : Dimensions 151x98x97.5mm . Poids 4Kg   http://www.priceminister.com/offer?action=desc&aid=280092061

*** 40 EUR 12V18Ah = 216 Wh 0.18 EUR/Wh 37 Wh/kg Caractéristiques : Dimension 181x77x167mm . poids 5,70Kg http://www.priceminister.com/offer?action=desc&aid=114187437

*** 175 EUR 12V100Ah = 1200 Wh 0.15 EUR/Wh 38 Wh/kg Caractéristiques : Dimensions: 328x175x216mm. Poids: 31Kg 

*** 140 EUR 12V145Ah = 1740 Wh 0.08 EUR/Wh 49 Wh/kg  longueur 512x189x225 35 kg http://cgi.ebay.fr/Batterie-de-Camion-145ah-Batterie-de-Bateaux-/261080527354?pt=FR_JG_Moto_Pi%C3%A8ces&hash=item3cc99cb1fa#ht_1971wt_1165

*** 250 EUR 12 volts 111 Ah = 1332 Wh. 0.19 EUR/Wh 40 Wh/kg  (C20) - D: 330x173x220 mm. 33.1 Kg  http://www.priceminister.com/offer?action=desc&aid=494856956

*** 250 EUR camion 60kg 12V 200AH 1200EN / BORNE+G / 518 x 273 x 241 http://www.agram.fr/Magasin-Piece-Rechange/FicheArticle.php?IdArticle=40227

*** http://www.priceminister.com/boutique/PROTECTOR/kw/batterie

*** 249.95  33 x 17 x 22 Poids : 32 Kg 12V 110Ah http://www.priceminister.com/offer?action=desc&aid=286088063&productid=90337258

*** http://www.accus-service.fr/BatteriesIndus.asp

*** loi de peukert http://forum-photovoltaique.fr/viewtopic.php?f=40&t=9010

*** 5-8 EUR/kg

** LiFePO4

*** 545 USD = 440 EUR 24V30Ah = 720 Wh 0.61 EUR/Wh 96 Wh/kg 7.50 kg Small Size: 300x105x150 mm http://www.pingbattery.com/servlet/the-V2.5-LiFePO4-Battery-Packs/Categories

*** http://forum-photovoltaique.fr/viewtopic.php?f=40&t=11020

*** http://www.southampton.ac.uk/mediacentre/news/2012/feb/12_24.shtml

* kit

** PV 100W + 12V90Ah 799 EUR http://www.solar-kit.com/epages/62035995.sf/fr_BE/?ObjectPath=/Shops/62035995/Products/%22kit-panneau-solaire-camping-car-mobile-home-%28500Wh/jour%29%22

h2. Antennes et MB

* 29 dBi 50cm MIMO http://www.atel-electronics.eu/produkt.php?hash=08052

* 59.47 EUR HT http://www.i4wifi.eu/Antennas-5-GHz-1/26-dBi-dual-MIMO-dish-antenna-5-GHz.html?cur=1

* catalogue 5 GHz http://www.i4wifi.eu/index.php?cur=1&tpl=&_artperpage=100&?cur=1&force_sid=f1q12b2lncee76uad8per3dd04&cl=alist&searchparam=&cnid=614

* http://wiki.confine-project.eu/hw:antennas

* http://www.interprojekt.com.pl/mikrotik-routerboard-433llevel-64mb-minipci-p-1241.html

** 57.14 EUR HT CPU Atheros AR7130 300MHz 64MB RAM, 3 LAN, 3 miniPCI 2W 105 mm x 154 mm, Weight: 137g L4

* http://www.interprojekt.com.pl/mikrotik-routerboard-433uahl-3xlan-3xminipci-1xusb-p-1243.html

** 83.90 EUR HT CPU Atheros AR7161 680MHz 128MB 3xLAN, 3xminiPCI, 1xUSB 2W 105 mm x 154 mm, Weight: 137g L5

h2. Systemes

* http://opensourceenergy.wordpress.com/2012/06/25/hello-world/

* Blow-by-Blow PV System Efficiency: A Case Study for Storage http://www.theoildrum.com/node/9499

* http://physics.ucsd.edu/do-the-math/2012/07/my-modest-solar-setup/

* http://www.hellopro.fr/natural-energy-solutions/lampadaires-solaires-pour-l-eclairage-public-2006842

* arduino 35mA 5V = 0.175W

** http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1280873480/11

* http://www.energiemobile.com/modulosite2/energie-mobile.htm

* 12W amorphe + batterie 12V 5Ah + chargeur 249.90 http://www.conrad.fr/kit_panneau_solaire_12_w_p_50682_50748_854189_563341_FAS

* 24W amorphe + batterie 12V 15Ah + chargeur 339.95 http://www.conrad.fr/kit_panneau_solaire_24_w_p_50682_50742_853686_715796_FAS

* Arduino MPPT http://www.timnolan.com/index.php?page=arduino-ppt-solar-charger

** http://en.wikipedia.org/wiki/Maximum_power_point_tracker

* Kermeur

** http://blog.lekermeur.net/?page_id=252

** http://www.lekermeur.net/lndkavr/

** http://blog.lekermeur.net/?p=1271

** http://blog.lekermeur.net/?page_id=287

 RB433, 2 minipci R52 ~ 15V 250 mA = 3.75W Ca fait 90 Wh par jour soit 15 euros et 2.7 kg par jour d'autonomie sur une batterie plomb, il faut encore multiplier par 2 ou 3 pour eviter de decharger trop.

 2 panneaux 65Wc + batterie 110AH => coupures en decembre/janvier

 2 panneaux de 80Wc et une batterie de 150AH => Ok

* Relai Solaire http://lists.vaour.net/pipermail/ran/2012-June/008031.html

 Ici, c'est un panneau 130Wc et une batterie 200Ah pour un 54gl et une  PS5. Ça tient la semaine du 21 décembre même quand il fait très très  nuageux dans les quelques heures de jour par journée 

* Test par Olivier

** [[Test_du_kit_Photovoltaique_Ekko_12W_pour_alimenter_un_WRT_autonome]]

* production http://physics.ucsd.edu/do-the-math/2012/08/solar-data-treasure-trove/

* production http://www.bdpv.fr

** a Toulouse en moyenne mensuelle polycristallin 1h/jour en décembre/janvier et jusqu'a 5h/jour en avril-juin

** http://re.jrc.ec.europa.eu/pvgis/apps/radmonth.php?lang=fr&map=europe

** quotidienne http://photovoltaique.bojolpif.com/news/production-decembre-2011.html

** http://pvoutput.org/list.jsp?userid=1598

** http://pvoutput.org/map.jsp?p=0&country=83

** http://pvoutput.org/aggregate.jsp?id=1681&sid=1275&v=0&t=w

** remarques : certains jours a moins de 5mn de production nominale, sur une semaine moyenne basse a 15mn/jour.

* orientation 

** http://www.ef4.be/fr/photovoltaique/aspects-techniques/orientation-structure.html

** http://www.cipcsp.com/tutorial/ensoleillement-france.html

* tracker DIY

** http://em.ch.free.fr/tipe/docs/dossier.pdf

* http://www.enerzine.com/14/14054+les-energies-renouvelables-sont-de-plus-en-plus-concurrentielles+.html

** http://www.irena.org/DocumentDownloads/Publications/RE_Technologies_Cost_Analysis-WIND_POWER.pdf

** http://www.irena.org/DocumentDownloads/Publications/RE_Technologies_Cost_Analysis-SOLAR_PV.pdf

** http://www.irena.org/DocumentDownloads/Publications/RE_Technologies_Cost_Analysis-HYDROPOWER.pdf

** http://www.irena.org/DocumentDownloads/Publications/RE_Technologies_Cost_Analysis-CSP.pdf

** http://www.irena.org/DocumentDownloads/Publications/RE_Technologies_Cost_Analysis-BIOMASS.pdf

** http://www.irena.org/DocumentDownloads/Publications/Renewable_Energy_Jobs_and_Access.pdf

* Mikrotik

** http://wiki.mikrotik.com/wiki/Solar_Power_HOWTO

** http://mydigital.info/Mikrotik/RouterBoardPowerUsageNotes.aspx

* http://forum.mikrotik.com/viewtopic.php?f=3&t=27981

* arduino régulateur de charge http://fixme.ch/wiki/R%C3%A9gulateur_de_charge_de_batterie_intelligent

** http://www.timnolan.com/index.php?page=arduino-ppt-solar-charger

* PIC32 MPPT et chargeur batterie serie d'article

** http://www.abcpic.fr/2011/11/29/chargeur-mppt/

** http://www.abcpic.fr/2011/12/03/la-famille-des-pic32/

* http://fr.wikipedia.org/wiki/Maximum_power_point_tracker

** interet MPPT http://www.youtube.com/watch?v=QpL4RR0_QyM

* http://www.solarfreaks.com/tiny-mppt-t282.html

h2. Liens

* http://users.humboldt.edu/arne/pubs.html

* http://hacknmod.com/hack/solar-and-wind-powred-wi-fi-repeater/

* http://www.lilegal.org/

expérimentation post-industriel a qqs km de Toulouse, éoliennes auto construites, lilian dot chardon at orange.fr 06 14 16 79 23

* http://infracom-france.com/blog2/?p=9690

* Poste d'alim autonome "tout prêt": http://landashop.com/catalog/advanced_search_result.php?keywords=solar&osCsid=t05of5248n5f8bmgptksub3d10&x=0&y=0

* http://technoblogtroisieme.unblog.fr/

* http://technoblogtroisieme.unblog.fr/2012/05/18/recharger-son-portable-a-lessence/

* http://forum.ubnt.com/showpost.php?p=366914&postcount=1099

h2. Mats

* CTA : http://www.cta-pylones.com/

* Leclerc : http://www.antennes-leclerc.fr/

* mat alu telescopique http://www.batima-electronic.com/spip.php?article160

* eolien http://www.ase-energy.com/mat-haubane-universel-7m-pour-eolienne,fr,4,MAT7M.cfm

* eolien http://www.aurore-energies.com/eolienne/mat_universel_de_6_metres_a_4_haubans/mat_6m_pour_petite_eolienne_mat_haubane.html

* telescopique pneumatique photo 15m http://www.youtube.com/watch?v=ycjhHruigQ0&feature=related

h2. Panneaux solaires

* http://www.iqsun.com/demo/iphone.php

** http://www.enerzine.com/1/14329+solairemed-va-commercialiser-son-panneau-photovoltaique-intelligent+.html

* http://www.stecasolar.com/index.php?Selection_du_regulateur_de_charge_solaire

* 100W pour 71.43 TTC livré 1041 x 669 x 35 mm (H x l x P). http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=140831992552&ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_2541wt_1398

* Pansonic ex Sanyo HIT production 

** http://www.bdpv.fr/fiche_utilisateur.php?util=savoisien83

** http://www.bdpv.fr/fiche_utilisateur.php?util=iibm

** http://www.ebay.de/itm/SANYO-HIP-230-HDE-1-SOLARMODUL-HIP-230-PV-PHOTOVOLTAIK-/140457931744

** http://www.solarshop.net/product_info.php/products_id/3767

* http://siliconsolar.com

* http://www.motto-engineering.eu/en/products/solar/schott-solar/

* http://www.mercateo.com/q?query=solarmarkt&catcat=live~showGrossColumn*

* http://www.ebay.de/itm/Schott-Solar-ASI-103-Photovoltaik-Solar-Solarmodul-/220871992555?pt=Solaranlagen&hash=item336cff24eb#ht_1312wt_1141

* http://www.simple-et-solaire.com/panneau-solaire/panneau-solaire-12v/panneau-solaire-amorphe-95wc.html

* http://www.birdenergy.fr/shop/catalog/index.php?cPath=26 (Régulateurs multi-entrée Solaire/Eolien/hydro)

* http://www.energiemobile.com/modulosite2/catalogue-produits.htm

* http://www.vaa-solarhandel.de/wp-content/uploads/2011/04/08.11.2011-Module-WR-Kombi-BHKW-Sonstiges-Grundst%C3%BCck-Solarkabel-Gesuche.pdf

* http://www.evotrend.de/sonderangebote.html

* http://www.enerzine.com/1/14079+rec-lance-le-1er-module-polycristallin-a-passivation-de-255-w+.html

* etude production http://forum-photovoltaique.fr/viewtopic.php?f=37&t=23056

* en decembre janvier minimas vers 35 Wh/Wc sur le mois

* http://www.alma-solarshop.com/

h2. Photovoltaique amorphe

* http://www.terra-eco.com/-Panneaux-solaires-photovoltaiques-

* http://www.equipsolar.fr/equipsolar.php?rb=2&pg=0

* http://ecatalog.tritec.info/index.php/language/fr/cat/c135_Schott-Solar-ASI-Thin-Film.html

* http://www.globosolar.fr/materiel-photovoltaique/panneaux-photovoltaiques/schott-solar.html

* http://www.tritec-energy.com/en/solar-modules/schott-asi-series-the-next-generation-c-135/

* http://www.surtec.fr/catalog/panneau-solaire-amorphe-cPath84.html

* http://www.elysun.fr/module-photovoltaique-amorphe-schott-asi-100w.html

* http://pvinsights.com/

* http://www.sunelec.com/suntech-solar-panel-220-watts-3420-vmp-p-1363.html

h2. Batteries

* http://www.narbonneaccessoires.fr/energie.html?order=name&dir=asc

* http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

* http://www.mpoweruk.com/life.htm

* http://fr.wikibooks.org/wiki/Batterie-plomb

* http://www.energiedouce.com/batterie-au-gel-a-decharge-profonde-12v-110ah-victron-energy.html

* http://www.installer-panneau-materiel-solaire.com/batteries/?mod=ecommerce&prid=&rid=4&type=pro&marque=&prix=&autre=&page=0

* http://www.maurelma.ch/shop/index.php?cat=WG101&product=740089

* http://shop.ebay.fr/mtk-handel/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686

* http://www.all-batteries.fr/

* http://www.blogeee.net/2012/06/avec-lhyperjuice-de-sahno-quand-il-ny-en-plus-il-y-en-encore/

** http://www.hypershop.com/SearchResults.asp?Cat=220

** 50Wh 46 EUR http://www.amazon.fr/gp/product/B0067XVUF8/ref=as_li_ss_tl?ie=UTF8&tag=blogeeenet-21&linkCode=as2&camp=1642&creative=19458&creativeASIN=B0067XVUF8

* http://tecsol.blogs.com/mon_weblog/2012/02/armoires-electriques-autonomes-le-stockage-comme-solution-pour-pallier-les-pics-de-consommation.html

** Castres http://www.sireaenergie.fr/

** http://www.sireaenergie.fr/suivi_photovoltaique/installations_autonomes.html

** http://www.sireaenergie.fr/docs/Catalogue.pdf

* http://www.easylibatteries.com/

* https://intranet.insa-toulouse.fr/view/483/content/BE%20Dim/INSTALL_PV/Batterie/batterie/%C3%89nergie%20autonome%20%20Batteries.htm

* http://www.infinitepowersolutions.com/press-room/178-ips-record-breaking-75000-full-battery-cycles.html

* test bench http://matthack.com/battery-benchmark-circuit-v8-0/

* battery control http://99mpg.com/workshops/designingandbuildi/

* spec sheet http://www.onenetwork.fr/energies/pdf/Datasheet%20-%20GEL%20and%20AGM%20Batteries%20-%20rev%2005%20-%20FR.pdf

* http://forum-photovoltaique.fr/viewtopic.php?f=40&t=26304

** MOLL solar ont les mêmes caracteristiques:

** 8000 cycles à 20 % de décharge 8000*20%=1600

** 3000 cycles à 50 % de décharge 3000*50%=1500 (-7%)

** 1500 cycles à 80 % de décharge 1500*80%=1200 (-33%)

* http://www.victronenergy.fr/batteries/gel%20and%20agm%20batteries/

** 4500 a 30% = 1350

** 2500 a 50% = 1250 (-8%)

** 1500 a 80% = 1200 (-12.5%)

* http://www.victronenergy.fr/batteries/telecom%20batteries/

* http://www.victronenergy.fr/batteries/lithium-ion/

** http://www.victronenergy.fr/upload/documents/Datasheet_Lithium_ion_rev03_FR_web.pdf

* controleur de charge individuel RS232 DIY http://endless-sphere.com/forums/viewtopic.php?f=14&t=38755

* http://www.solarpaneltalk.com/showthread.php?2214-LiFePO4-The-future-for-off-grid-battery-banks

* LiFePO4 charging http://www.batterypoweronline.com/eprints/TI_0510.html

* http://www.wind-sun.com/ForumVB/showthread.php?7344-Lithium-Iron-Phosphate-Batteries-LFP-LiFePO4-discussions

h2. Remote Power Control

* modele TCW180  http://www.teracom.cc/index.php/products/monitoring-and-control/ethernet-controllers.html

h2. UPS DC

* How to build a cheap UPS for PC Engines ALIX http://1wt.eu/articles/alix-ups/

* http://www.interprojekt.com.pl/uninterrupted-power-supply-c-112.html

* https://www.aerial.net/shop/product_info.php?products_id=1199

* DC DC http://www.current-logic.com/shop/index.php?main_page=product_info&cPath=10_18&products_id=167

* DC DC 9-36 vers 18/24/48 http://streakwave.com/Itemdesc.asp?ic=TP-DCDC-1224

h2. Piles a combustible

Piles au methanol pour les caravanes avec un modele en vente (ebay & boutiques meme sur Toulouse) autour de 2000 euros pour 25W (12V * 2A) de capacité, petite boite  43,5 x 20,0 x 27,6 cm / 6.5 kg et 0.9 litre de methanol par kWh produit. A 10W cela fait 45 jours d'autonomie pour 40 euros la recharge de 10 litres.

* http://energieplanete.secondes.info/prix-des-piles-a-combustible-efoy/

* http://www.efoy.com/fr/piles-a-combustible-produits.html

* http://www.le-camping-car.com/forum/electricite-energie-autonomie-f71/pile-combustible-efoy-t50.html

* http://www.ebay.de/sch/i.html?_from=R40&_trksid=p5197.m570.l1313&_nkw=efoy&_sacat=See-All-Categories

* http://www.efoy-comfort.com/fr/donn%C3%A9es-techniques-0

* 300Wh/kg rechargeable http://www.enerzine.com/14/14099+fantassin-felin---le-prototype-de-pile-a-combustible-recompense+.html

* http://www.enerzine.com/1036/14578+le-kangoo-ze-double-son-autonomie-grace-a-lhydrogene+.html

h2. Eolien

* http://www.onpeutlefaire.com/construire-une-eolienne-a-axe-vertical

* http://www.tieole.com/

* http://www.windstuffnow.com/main/vawt.htm

* http://hacknmod.com/hack/diy-wind-energy-green-electricity-turbine/

* http://www.aerial.net/shop/index.php?cPath=104

* http://www.aerial.net/shop/product/1101/macrowind-400w-12v-6-blades.html

** http://french.alibaba.com/product-gs/small-wind-turbine-321651845.html

* Test de petites eoliennes http://www.bettergeneration.com/green-energy-reviews.html

* En haute garonne installateur vendeur : http://www.krugwind.com/

* Test SEPEN http://www.sepen-montplaisir.fr/

* http://fr.wikipedia.org/wiki/Petit_%C3%A9olien

* http://eolienne-petite.com/

* http://www.econologie.com/forums/energies-renouvelables-eolien-hydraulique-geothermie-energies-marines-biomasse-et-biogaz-vf39.html

* VAWT Vertical Axis Wind Turbine

** http://www.galeforce.eu/index.php?article_id=1&clang=1&climazones=dry

* http://greenterrafirma.com/wind%20turbines.html

** Power AVAILABLE in the wind = .5 x air density x swept area x (wind velocity cubed)

 Air density = 1.23 kg per cubic meter at sea level. Swept area = pi x r squared. Our 2 foot blades = 0.609m, 4 ft = 1.219m. 10 mph = 4.4704 m/s, 20 mph = 8.9408 m/s. 

 10 mph = 16.09344 kph 

 10 feet = 3.04800 meters

 How much power is in the wind: 

 2 ft blade, 10 mph winds = .5 x 1.23 x 3.14x0.609squared x4.4704 cubed  = .5 x 1.23 x 1.159 x 89.338 = 63.7 watts

 With 4 foot blades and 10 mph winds = .5 x 1.23 x 4.666 x 89.338 = 256 watts

 With 4 foot blades and 20 mph winds = .5 x 1.23 x 4.666 x 714.708 = 2051 watts

 That's the MAXIMUM power in the wind. However, it's impossible to harvest ALL the power. The Betz Limit tells us that the maximum percentage of power we can harvest from the wind is 59.26%.

 Thus our maximum power from these turbines would be:

 2 ft blades, 10 mph wind = 37.7 watts

 4 ft blades, 10 mph wind = 152 watts

 4 ft blades, 20 mph wind = 1,215 watts

* http://forum-photovoltaique.fr/viewtopic.php?f=50&t=25037

** http://www.avelheol-blog.com/article-la-technique-de-regulation-pas-variable-en-petit-eolien-107602346.html

* http://club-langevin.boulangerr.fr/eolienne/FABRIQUER%20UNE%20EOLIENNE%20TRANSPORTABLE.doc

* http://energethique.be/2009/fabriquer-une-eolienne-pour-moins-de-40-e/

h2. Mats

* http://basse-normandie.france3.fr/2012/09/13/lignes-tht-un-agriculteur-de-la-manche-fait-plier-rte-80271.html

* http://basse-normandie.france3.fr/2012/10/11/le-proces-contre-rte-une-nouvelle-fois-reporte-119343.html

h2. Stirling

* http://www.solarfire.org/SWEE-Technologies,129

* http://volodesigns-sterlingproject.blogspot.fr/

h2. Ultra capacitors

http://energy.gov/sites/prod/files/piprod/documents/Session_D_Miller_rev.pdf

h2. Forums

* http://forum-photovoltaique.fr/viewtopic.php?f=40&t=22015

* http://forum.mikrotik.com/viewtopic.php?f=7&t=57601

* http://forum.mikrotik.com/viewtopic.php?f=3&t=45990&p=259224&hilit=fuel+cell#p237245

h2. Solutions radio

* http://shop.snootlab.com/lang-en/33-communication

* http://jeelabs.com/products/jeenode

h2. Technologie

* comparaison type PV http://researchrepository.murdoch.edu.au/501/2/02Whole.pdf

* http://www.posharp.com/photovoltaic/panelefficiency/database.aspx

* http://www.freeenergyeurope.com/htm/FEE_solar_panel_test_results.htm

> Cell Type: The type of silicon that comprises a specific cell, based on the cell manufacturing process. Each cell type has pros and cons. Monocrystalline PV cells are the most expensive and energy intensive to produce but usually yield the highest efficiencies. Though polycrystalline and ribbon silicon cells are slightly less energy intensive and less expensive to produce, these cells are slightly less efficient than monocrystalline cells. However, because both poly- and ribbon silicon panels leave fewer gaps on the panel surface (due to square or rectangular cell shapes), these panels can often offer about the same power density as monocrystalline modules. Thin-film panels, such as those made from amorphous silicon cells, are the least expensive to produce and require the least amount of energy and raw materials, but are the least efficient of the cell types. They require about twice as much space to produce the same power as mono-, poly-, or ribbon-silicon panels. Thin-film panels do have better shade tolerance and high-temperature performance but are often more expensive to install because of their lower power density.

> Sanyo’s "bifacial" HIT panels are composed of a monocrystalline cell and a thin layer of amorphous silicon material. In addition to generating power from the direct rays of the sun on the panel face, this hybrid panel can produce power from reflected light on its underside, increasing overall panel efficiency.

> Cells in Series: Number of individual PV cells wired in series, which determines the panel design voltage. Crystalline PV cells operate at about 0.5V. When cells are wired in series, the voltage of each cell is additive. For example, a panel that has 36 cells in series has a maximum power voltage (Vmp) of about 18V. Why 36? Historically, panels known as 12V were designed to push power into 12V batteries. But to deliver the 12V, they needed to have enough excess voltage (electrical pressure) to compensate for the voltage loss due to high temperature conditions. Panels with 36 ("12V") or 72 ("24V") cells are designed for battery-charging applications. 

> Panels with other numbers of cells in series are intended for use in grid-tied systems. Due to the increased availability of step-down/MPPT battery charge controllers, grid-tied panel

h2. Misc

Il faudra sans doute 50 a 100W de panneau photovoltaique pour un relai, on trouve du 90W amorphe pour 121 euros livrés :

http://www.ebay.de/itm/Schott-Solar-ASI-90-Dunnschicht-Solarmodul-/250927063886?pt=Solaranlagen&hash=item3a6c6b234e#ht_500wt_1413

20kg de batterie (100 euros) + panneau (121 euros) + regulateur (50 ?) + matos wifi et antennes (300 ?) ~ 600 euros.

http://www.interprojekt.com.pl/mikrotik-routerboard-level-64mb-3xlan-3xminipci-p-394.html

http://www.interprojekt.com.pl/mikrotik-routerboard-r52nm-minipci-p-898.html

http://www.interprojekt.com.pl/mikrotik-routerboard-r52hn-300mbps-80211abgn-high-p-745.html

MIMO et dual 2.4/5.5

Une solution alternative :

- un routerboard a la place du switch

- un cable pieuvre power jack 1 femelle vers 8 males

- une alimentation de portable 19V 3.42A

- un splitter PoE passif

- des injecteurs PoE passif

http://shop.varia-store.com/product_info.php?info=p1052_MikroTik-RouterBOARD-750--RB750--RB-750--Level-4-300-MHz.html

http://cgi.ebay.com/DC-1-8-Power-Cable-CCTV-Camera-DVR-Save-Adapter-/320442726434?pt=LH_DefaultDomain_0&hash=item4a9bdff822

http://cgi.ebay.com/PoE-Power-Over-Ethernet-Injector-Splitter-Adpater-Kit-/120719762126?pt=LH_DefaultDomain_0&hash=item1c1b7562ce

http://cgi.ebay.com/Acer-Notebook-AC-Adapter-Charger-19V-3-42A-5-5mm-2-1mm-/270686346419?pt=Laptop_Adapters_Chargers&hash=item3f0629dcb3

L'avantage du routerboard est qu'il accepte 9 a 28V DC en alimentation donc a peu pres comme les ubiquity et que ses temperatures de fonctionnement sont tres larges de -40 a +55C.

La doc du routerboard n'est pas tres claire sur la taille du power jack est-ce 5.5/2.0 ou le plus standard 5.5/2.1 ?