Post by thread:[AD]: Solar cells - NZ & Australia only

Dick Smith Electronics have their cat O2017 2 volt 500 mA solar cells on special at $12.70 + GST trade in 1/s . This is an ugly looking octagonal panel using 4 quarter round cells with "reasonable" but not good packing density. (121mm x 121mm x 4mm deep.) Weather sealing is marginal and for real use an exterior cover would be needed. Cells are electrically in series. These cells MAY represent the best value for money per watt available for small size solar panels. (If anyone in NZ / Oz knows a better value small panel please advise.) 7 or 8 of these in series would provide a 7 watt 12 volt panel - eg suitable for recharging your laptop during a weekend / week at the beach (get a life). Russell McMahon -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

At 11:14 AM 2/1/02 +1300, you wrote: >Dick Smith Electronics have their cat O2017 2 volt 500 mA solar cells on >special at $12.70 + GST trade in 1/s >snip< >These cells MAY represent the best value for money per watt available for >small size solar panels. (If anyone in NZ / Oz knows a better value small >panel please advise.) 7 or 8 of these in series would provide a 7 watt 12 >volt panel - eg suitable for recharging your laptop during a weekend / week >at the beach (get a life). In my very limited experience, if they are advertising 2 volt 500mA cells, they *usually* mean that the cells produce 2 volts OPEN CIRCUIT (ie, current = 0) OR 500mA SHORT CIRCUIT (voltage = 0) but not both at the same time. If so, then you won't get anything like a watt out of them. Of course, I could be completely in the dark regarding these particular cells. Best regards, Tom M. -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu

russell, thats just over their wholesale prices 10-19 units @ $10.92e + gst its easy to set up a wholesale account with them glen ========= 2 At 11:14 am Friday 01/02/2002 +1300, you wrote: {Quote hidden}>Dick Smith Electronics have their cat O2017 2 volt 500 mA solar cells on >special at $12.70 + GST trade in 1/s >. >This is an ugly looking octagonal panel using 4 quarter round cells with >"reasonable" but not good packing density. (121mm x 121mm x 4mm deep.) >Weather sealing is marginal and for real use an exterior cover would be >needed. > >Cells are electrically in series. > >These cells MAY represent the best value for money per watt available for >small size solar panels. (If anyone in NZ / Oz knows a better value small >panel please advise.) 7 or 8 of these in series would provide a 7 watt 12 >volt panel - eg suitable for recharging your laptop during a weekend / week >at the beach (get a life). > > > > > Russell McMahon > >-- >http://www.piclist.com hint: To leave the PICList >piclist-unsubscribe-requestKILLspammitvma.mit.edu -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> In my very limited experience, if they are advertising 2 volt 500mA cells, > they *usually* mean that the cells produce 2 volts OPEN CIRCUIT (ie, > current = 0) OR 500mA SHORT CIRCUIT (voltage = 0) but not both at the same > time. If so, then you won't get anything like a watt out of them. 2 V open + 0.5 A short => 4 Ohm impedance, so max (external!) power is with 4 Ohm load => half the short current, haf the open voltage => 0.5 Watt. Wouter van Ooijen Van Ooijen Technische Informatica: http://www.voti.nl Jal compiler for PIC uC's: http://www.voti.nl/jal PICs kopen? http://www.voti.nl/shop -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads