>As for why he has 120VDC, obviously using DC power for his >light bulbs in an off-grid solar power system. >So how well do CFL work on DC? I found some that work just fine on 120V DC! Not easy to find! I have plans to eventually do a transformer less IGBT H-Bridge Inverter, because of its minuscule idle current consumption! That is so I can run things like my washing machine from my battery bank! For now I have been running the generator, and I just bridge rectify the 120V AC to charge my battery bank! Interesting thing I notice is that while there is an Inductive load such as the Washing Machine motor spinning the charging current increases significantly! I suppose just clipping the peak Voltage as charging currents benefits the inertia of inductive PFC? I am looking to get a LCD Monitor for its much smaller Wattage and I will have the same issue as to find one that can do 120V DC! As for charging the Batteries in the future i bought a pack of these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300248099545&ssPageName=MERC_VIC_RSCC_Pr4_PcY_BID_Stores_IT&refitem=300244266212&itemcount=4&refwidgetloc=closed_view_item&usedrule1=StoreCatToStoreCat&refwidgettype=cross_promot_widget&_trksid=p284.m183&_trkparms=algo%3DDR%26its%3DS%252BI%252BSS%26itu%3DISS%252BUCI%252BSI%26otn%3D4 They can make 3 parallel strings of CIS PV cells to supply up to 240mA unconcentrated! And then there will be wind energy! On Thu, Aug 7, 2008 at 9:53 AM, Robert Rolf wrote: > Olin Lathrop wrote: > > Tobias Gogolin wrote: > > > >>Hi everybody I am looking for a ~ 400 Watt power supply for my > >>computer that can work on 120V AC [grid] as well as on my 120V DC > >>Battery Bank at my ranch! > > > > > > Probably most can, although you wan't likely find that in the spec sheet. > > Fortunately, these things are cheap. Get one that is "auto ranging" and > > specified to work over the full range of world grid voltages, usually > > something from 90-260 VAC, 50-60Hz. Make sure it has the CE logo, which > > most will anyway. That guarantees it has a PFC front end at that power > > level, making it even more likely that there is a full wave bridge > > immediately after the power input. > > I was going to say the same thing, but Olin beat me to the post. > > As for why he has 120VDC, obviously using DC power for his > light bulbs in an off-grid solar power system. > > So how well do CFL work on DC? > > The PSU you already have will likely work. > If it doesn't start up, you know it needs more than 120VDC internally. > At worst, it will just blow the primary fuse since DCOK signal > will never be asserted, so the computer won't come out of reset. > > I assume you looked at your monitor as well? > > Robert > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- Tobias Gogolin Tel. Movistar (646) 124 32 82 Tel. Telcel (646) 160 58 99 skype: moontogo messenger: usertogo@hotmail.com You develop Sustainable Ranch Technology at http://tech.groups.yahoo.com/group/SURA-TECH an Open Source Electric Motor/Alternator at http://groups.yahoo.com/group/Performance_Axial_Flux and an Open Source Motor Controller at http://groups.yahoo.com/group/GoBox -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist