Thank you everyone for your input. The client has confirmed that there is a good Wireless Router signal at the site and has asked us to look at (1) an email notification and (2) web browser interface.
Right now we have specified a Blue Sky Energy Solar boost 3024i. They have an auxiliary output, with a V-high and V-low programmable sense voltage settings. When the battery voltage is greater than the V-high for more than 20 sec, the aux output is the battery voltage. When the battery voltage is less than the V-low point for more than 20 sec, the aux output voltage goes to zero. The problem as I see it, is that we need two signals. One a warning and one the actual disconnect. If we let the built-in function supply the disconnect function, then we will still need a second sense/control widget to provide the warning signal. So we need a sense signal and an internet-enabled widget that will (1) send a fixed email message on the command signal and (2) if possible provide some level of status in a browser window. So does anyone have any solutions for (1) and possibly (2)? Thanks in advance. - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com _____ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Lerner Sent: Saturday, January 31, 2009 8:35 AM To: RE-wrenches Subject: Re: [RE-wrenches] Low Voltage Alarm Based on cell phone text message Hello Peter, Is there good cell coverage or Internet access on the site? What Inverter are you using? Best, Jason Lerner Waldron Power and Light Co. On Jan 31, 2009, at 8:09 AM, Peter Parrish wrote: We have sold an off grid system delivering 24 volts DC. The application is "mission important". We have built in a LVD and alarm, but the client wants an "early warning" system based on sending text message to a cell phone number. So we need to program a LCD around 20% residual capacity (easier part) and a cell phone interface. I know the PPA community has a solution: high-end comm link and big bucks. Is there something simple and cheap that we can implement? - Peter Peter T. Parrish, President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
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