IOTA chargers; 120 vac/24 vdc are super efficient but probably larger than you need, 15 amp at 24 vdc is the smallest unit. I have used them for Sunfrost refrigerators when the utility came in and they wanted to keep the freezer or frig. IOTA chargers essentially turn off when there is no load and only use power proportional to the load when on.
---------------------------------------------------------------------------- Dana Orzel Great Solar Works, Inc - NABCEP # 051112-136 E - [email protected] - Web - solarwork.com O - 970.626.5253 C - 208.721.7003 - No FAX Line "Responsible Technologies for Responsible People since 1988" P Please consider the environment before printing this email. From: RE-wrenches [mailto:[email protected]] On Behalf Of Dave Sent: Thursday, January 29, 2015 11:58 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Low wattage 120vac to 24vdc transformer for LED's We are renovating a 25 yr old off grid house and one of things being done is to change some 24vDC circuits to 120vac. The only problem that I'm having is finding a low wattage 120vac to 24vdc transformer for a few strings of 24v LED night lights (a few watts each string) that are built into some nice hardwood trim in the bedrooms. I just tested the following device and found that it uses 29 Watts to power a 3W LED. Not an acceptable load for this house. It is labeled as LED Magnetic Transformer by National Specialty Lighting part # TR24L20DC-M20L24DC-AR Input: 120vac, Output 24vdc, Maximum 20W Is there anything else available that will do this job and use a lot less power than 29 Watts? Thanks, Dave David Palumbo Independent Power LLC 462 Solar Way Drive Hyde Park, VT 05655 802-888-7194
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