Efficiency advantage 12 vs 24v controller?
bmet
Solar Expert Posts: 630 ✭✭
I see that some controllers sold by this forum's host have option of either being 12 or 24v. Is there an efficiency advantage for 24v charge controllers when maintaining 12v battery bank?
I am confused by this statement concerning one of the Bluesky mppt controllers.
" The dual 15/20 amp rating will deliver up to 15 amps in 24 volt systems, or up to 20 amps in 12 volt systems. "
This sounds backwards to me. Shouldn't 24v be more electromotive force, pushing more current to the battery? Thank you.
I am confused by this statement concerning one of the Bluesky mppt controllers.
" The dual 15/20 amp rating will deliver up to 15 amps in 24 volt systems, or up to 20 amps in 12 volt systems. "
This sounds backwards to me. Shouldn't 24v be more electromotive force, pushing more current to the battery? Thank you.
Comments
-
Re: Efficiency advantage 12 vs 24v controller?
I don't know about the Blue Sky controllers specifically--but most controllers have a output current limit of XX Amp at 12/24/48 volts...
Being that power is equal to voltage * current, the same current will result in more power through the controller into the battery bank:- P=VI
- 14.5 volts charging * 60 amp controller limit = 870 watts
- 29 volts * 60 amps = 1,740 watts
- 58 volts * 60 amps = 3,480 watts
-BillNear San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
Categories
- All Categories
- 243 Forum & Website
- 150 Solar Forum News and Announcements
- 1.4K Solar News, Reviews, & Product Announcements
- 189 Solar Information links & sources, event announcements
- 918 Solar Product Reviews & Opinions
- 256 Solar Skeptics, Hype, & Scams Corner
- 22.5K Solar Electric Power, Wind Power & Balance of System
- 3.5K General Solar Power Topics
- 6.7K Solar Beginners Corner
- 1K PV Installers Forum - NEC, Wiring, Installation
- 2.1K Advanced Solar Electric Technical Forum
- 5.5K Off Grid Solar & Battery Systems
- 438 Caravan, Recreational Vehicle, and Marine Power Systems
- 1.1K Grid Tie and Grid Interactive Systems
- 652 Solar Water Pumping
- 829 Wind Power Generation
- 625 Energy Use & Conservation
- 624 Discussion Forums/Café
- 301 In the Weeds--Member's Choice
- 91 Construction
- 124 New Battery Technologies
- 108 Old Battery Tech Discussions
- 3.8K Solar News - Automatic Feed
- 3.8K Solar Energy News RSS Feed