Solar PCU

sridharTSsridharTS Registered Users Posts: 33
Is solar PCU we call it as OFF grid system.

Comments

  • BB.BB. Super Moderators, Administrators Posts: 29,511 admin
    PCU = Power Conditioning Unit?

    As we use the term in the US, a PCU can run from an inductive filter, to resonant transformer, to variable tap transformer, to electronics+battery bank+charger. This last one we typically call a UPS (Uninterruptible Power Supply).

    And UPS units can have a mix and match of different items above (filters, variable tap transformers, AC Inverter-Charger+Battery bank).

    Each has its reason for existing--But an Off Grid Power system is typically a UPS like system + Generator Backup (for more than 30 minutes of off grid power).

    When we design/build off grid power systems, we are essentially building a UPS system using "components" (solar panels, AC genset, Solar charge controller, AC inverter, AC backup charger, transfer switches, external battery bank).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • Dave AngeliniDave Angelini Solar Expert Posts: 4,665 ✭✭✭✭✭
    Bill, what would it take for you to tell this to one of my offgrid computer clients? They use more KWH for back-up computer gear than the household load. And then there was the audiophile who ran vacuume tube power amps....And the woman with the 220v kiln for pottery 24/7....
    "we go where power lines don't" Sierra Mountains near Mariposa/Yosemite CA
     http://members.sti.net/offgridsolar/
    E-mail [email protected]

  • BB.BB. Super Moderators, Administrators Posts: 29,511 admin
    Unless somebody is trying for 100% solar. My suggestion for backup power is pretty much a fuel driven genset (natural gas, stored fuel of some sort, etc.). The "UPS" has a battery bank only large enough to keep the loads "happy" for 30 minutes--The time it takes to get a genset started and warmed up to take the load.

    Computers--They are real killers if you are looking at lots of processing power+memory. In general it seems, the "farms" are keeping the kWatts per rack roughly equivalent, and the next gen hardware consumes about the same amount of power with more MFlOPS of processing and TBytes of memory+storage.

    Have not seen anyone trying a "server farm" with Ipads or Android tablets yet (low power usage and limited processing power).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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