Re: [RE-wrenches] Unique off-grid

I’m not sure if they are available everywhere as yet, I think they’re still testing them with a few distributors. The compressors are not the Danfoss they’re Tecumseh on the 48 volt units. Call me for more info on this. Kind regards Tom Duffy Senior Solar Design Engineer [Real-logo-X-195] E-Mai

Re: [RE-wrenches] Unique off-grid

Oh, nice, thanks Tom! I wasn't aware of the 48v SunDanzer. Good units. Dan Fink Buckville Energy IREC Certified Instructor™ for: ~ PV Installation Professional ~ Small Wind Installer NABCEP / IREC / ISPQ Accredited Continuing Education Providers™ 970.672.4342 On Fri, Nov 14, 2014 at 1:53 PM, T

Re: [RE-wrenches] Unique off-grid

Dan Although I don’t understand the politics of this We have been selling the SunDanzer 48 Volt 14 cu.ft. here in Panama, Central America, so as far as I know there is a 48 volt something out there. Kind regards Tom Duffy Senior Solar Design Engineer [Real-logo-X-195] E-Mail: t...@thesolar.biz

Re: [RE-wrenches] Preventing 24/7 Transformer Losses

Garrison: Are you sure you need a transformer to connect directly to the 3 phase? I believe the system you refer to is an open-delta. We've installed the old SB2500 units on open-delta before. This was before the neutral sensing requirements, however. Many inverters have provisions for disa

Re: [RE-wrenches] Battery Venting (WAS Passive Battery Venting)

Hi: I came across this document related to battery venting and calculation of the required vent hole size which was put out by Sonnenschein, It's based on the EN 50272-2 standard. Perhaps it can be used to provide some guidance for discussion with AHJ's http://www.sonnenschein.org/PDF%20fil

[RE-wrenches] Preventing 24/7 Transformer Losses

Hello Wrenches, In my area we end up installing a lot of systems on 240V 3Ph high leg services. To allow for more inverter options (like TL that require a neutral) it seems like using a transformer would a good idea, but it is hard to justify the losses under load and especially 24/7 losses re