Hello David, I thought I would share with the Wrenches the below answer from our Tech Support.
Rgds, John From: Tom Lowder Sent: Wednesday, August 03, 2011 10:17 AM To: d...@independentpowerllc.com Cc: John DeBoever; Dean Middleton; Stacey Delzeit Subject: Questions on RE product Dave, Hi. Below we have answers for the questions that were sent regarding the L16RE 2V product in a particular application. If you have any further questions you can contact us through the web site or Technical Support call line. Stacey or I will do our best to get the information you request. The Premium line (L16RE-2V, T105-RE, L16RE-A, L16RE-B) have a slightly lower recommended absorption-regulation charge phase voltage setting range: 2.35V to 2.45V per cell. The recommended float charge phase voltage setting is 2.20V per cell. The recommended equalization charge phase is 2.58V per cell. Standard temperature compensation applies. You wrote in italics - answers in red I have a question on the Trojan RE Series charging voltage settings. I know the specific gravity is lower on this series and the bulk charge voltage is correspondingly lower than the old L-16's. I have an off grid system for a remote home where the client is only there from June through October. He has 1,560 Watts of solar and a new battery bank rated at 2,220 AH at 12 volts (12 L-16 RE-2V batteries). That is a charge rate in the C/20 range. The homeowner uses the system reasonable hard when they are there but during the winter the load is only 15AH per day for a low voltage security system. He has previously serviced his Rolls CH-375's (1,400AH with 450 Watts of PV on that system, about a C/33 rate) in October before leaving for 7 months and has not had a problem with the battery electrolyte boiling off too much over that time period. He got 10 years out of the Rolls batteries using it in this way. The charge voltage for that system was 14.6 through a Solar Boost 50. The new system will have 1,110 Watts charging through a Out Back FM 80 alongside the original array on the Solar Boost for the total of 1,560 Watts of PV. I am thinking of charging at 14.6 Bulk with a two hour absorption time period in the summer and then changing it for the 7 month period when the system is lightly used. 14.6 - 14.7V for the absorption-regulation phase charge during the summer usage is fine. The two hour absorption-regulation phase charge time should be sufficient. My question is, how low should I set the two charge controllers for winter/spring use to minimize water consumption? I'm thinking of 14.2 or 14.3 Volts, with a reduced absorption time of one hour. And what should the float voltage setting be? The batteries are in a basement that is kept at about 55 degrees. There is temperature compensation on the battery charging. 14.1V would be the optimal voltage setting for the absorption-regulation phase charge during the winter usage to minimize water loss. Given the very low load during the winter, I would think that 1 hour would be plenty of absorption-regulation charge phase time. One hour for any equalization charge also would be sufficient. Float voltage charge phase setting should be 13.2V, during summer or winter months. The temperature compensation for 55F should be 0.4V so the charger needs to adjust automatically the setting in the solar charger. The solar charger should adjust in the winter the absorption-regulation voltage setting to 14.5V and the float voltage setting to 13.6V. Again, if you have any questions, please let us know. Thank you, Tom Lowder Manager, Applications Engineering Trojan Battery Company 5174 Minola Drive Lithonia, GA 30038 Tel: 678-518-7365 Fax: 678-518-7398 tlow...@trojanbattery.com<mailto:vh...@trojanbattery.com> www.trojanbattery.com<http://www.trojanbattery.com> Trojan Battery Company - Clean Energy for LifeTM From: John DeBoever Sent: Tuesday, August 02, 2011 6:06 PM To: 'RE-wrenches' Cc: Stacey Delzeit; Tom Lowder; Dean Middleton Subject: RE: [RE-wrenches] Trojan RE Series Tech question Hello David, You are correct, Ronald Parades is not working with us anymore. Our Technical Support is provided by Stacey and Tom, both of whom have their contact number here: http://www.trojanbatteryre.com/Tech_Support/Tech_Support.html?tab=0#TabbedPanels1#top Phone Trojan telephone tech support is available Monday thru Friday, 7am to 5pm Pacific Standard Time. US and Canada: 800-423-6569 International: +1-562-236-3000 Your email arrived at 2:30 PM PST to Ronald old address and has been re-directed. Please look for a response by tomorrow. Regards, John From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo Sent: Tuesday, August 02, 2011 5:50 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Trojan RE Series Tech question Our go to guy at Trojan, Ron Parades, is evidently gone. That's what they said at his old phone extension at Trojan. I left a message for tech support there and have not heard back as of yet. Is there another Trojan Tech person to specifically ask for now? And is there one on this list helping out as Ron did previously? I have a question on the Trojan RE Series charging voltage settings. I know the specific gravity is lower on this series and the bulk charge voltage is correspondingly lower than the old L-16's. I have an off grid system for a remote home where the client is only there from June through October. He has 1,560 Watts of solar and a new battery bank rated at 2,220 AH at 12 volts (12 L-16 RE-2V batteries). That is a charge rate in the C/20 range. The homeowner uses the system reasonable hard when they are there but during the winter the load is only 15AH per day for a low voltage security system. He has previously serviced his Rolls CH-375's (1,400AH with 450 Watts of PV on that system, about a C/33 rate) in October before leaving for 7 months and has not had a problem with the battery electrolyte boiling off too much over that time period. He got 10 years out of the Rolls batteries using it in this way. The charge voltage for that system was 14.6 through a Solar Boost 50. The new system will have 1,110 Watts charging through a Out Back FM 80 alongside the original array on the Solar Boost for the total of 1,560 Watts of PV. I am thinking of charging at 14.6 Bulk with a two hour absorption time period in the summer and then changing it for the 7 month period when the system is lightly used. My question is, how low should I set the two charge controllers for winter/spring use to minimize water consumption? I'm thinking of 14.2 or 14.3 Volts, with a reduced absorption time of one hour. And what should the float voltage setting be? The batteries are in a basement that is kept at about 55 degrees. There is temperature compensation on the battery charging. Thank you, David Palumbo Independent Power LLC 462 Solar Way Drive Hyde Park, VT 05655 www.independentpowerllc.com<http://www.independentpowerllc.com> NABCEP Certified PV Installer Vermont Solar Partner 23 Years Experience, (802) 888-7194 This e-mail message and any attachments that accompany it may contain information that is confidential, privileged, or protected from disclosure. It is intended solely for the use of the individual(s) to whom it was intended to be addressed. If you have received this e-mail by mistake, or you are not the intended recipient, any reading, disclosure, copying or other use of this communication is strictly prohibited. If you have received this communication in error, please immediately advise the sender at their phone number listed above, or by electronic mail, and also permanently delete the original and all copies of this e-mail and any attachments from all locations. Thank you.
_______________________________________________ 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
