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Thread: Solar Inverters

  1. #1
    Join Date
    Apr 2015
    Location
    United States
    Posts
    37

    Solar Inverters

    I am looking for a 12W and a 24kW inverter that have a 120/208v output to interface with a commercial service.
    The current designs call for 277/480v output inverters. Any product ideas for inverters and/o transformers - manuf would be helpful

  2. #2
    Join Date
    Jun 2004
    Location
    Cherry Valley NY, Seattle, WA
    Posts
    4,511
    Unfortunately, there is limited availability in larger 208 string inverters. Fronius has a 15kw that does 1kv strings. Chint has a 14Kw but it only does 600v strings. Solectria also has a 208V 14Kw but it also only does 600V strings. In fact, the fronius is the only three phase 208 inverter I could find doing a quick and dirty search that does 1kv strings. It seems many that are faced with this dilemma are using transformers. Other options to weigh are using more of the smaller 208 inverters, bring in a 480 service, or possibly investigate central inverter options.

    Edit: Just wanted to add, that I worked on system where they had 480 inverters and a 208 service and used transformers. It was horrible. So much time, hassle and money to for all the extra equipment and connections. I would strongly lean toward getting the correct voltage inverters, even if they are smaller than you might otherwise want.
    Last edited by electrofelon; 04-18-18 at 01:26 AM.
    Ethan Brush - East West Electric. NY, WA. MA

    "You can't generalize"

  3. #3
    Join Date
    Jul 2009
    Location
    Mesa Arizona
    Posts
    268
    Look at the Fronius Symo 12.0-3 208-240 inverter. Use two and an AC combiner for 24 KW. There is also the Fronius Symo 15.0-3 208, but it has a more limited DC voltage range and a single MPPT. These are 1000Vdc, but with careful selection of the array you can get full power under the 600V limit. Fronius has a good sizing tool.

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