Wednesday 18 December 2013

Off-grid living - Power system - Introduction

We have been living off-grid since 2006.
Our solar power generation system has been a great success.
I will be explaining certain parts of the PV system in the next series of posts.

First an overview of the PV system and its upgrades:
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The system as installed in December 2006 consisted of:
  • 1500W of Photovoltaic panels  
    • 12 PV panels  Sharp 123W Poly-crystalline
  • Outback Power Components 
    • FX3024E Inverter 3kW@240VAC
    • MX60 MPPT Charge Controller 60A@24V
    • MATE system controller
    • HUB4 system communication hub
    • Battery temperature monitor
  • Lead Acid Battery Bank 
    • Exide Energystore 24V (12x 2V cells) 1500Ahr @ C100
    • FLA (flooded lead acid) batteries
    • MegaPulse pulse generator for desulfation
  • Backup Power Generation
    • Generator to charge battery bank 
      • via FX3024E Inverter/Charger
      • while charging, generator supplies house 240V
    • 3kVA 240VAC 'silent' diesel generator
      • retired July 2007
    • Honda Eu20i generator 240VAC
      • added July 2007
  •   Switch boxes and breakers, fuses
    • PV panel circuit breakers at ~80V DC
    • MX 60 output breakers (both + and - sides)
    • Output 24V DC breaker (both + and - sides)
    • 24V DC heavy interconnection cabling
    • 240V AC fuse box
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The system was upgraded in December 2009:
  • Increase number of PV panels 
    • requirement run a 2.5kW reverse cycle air conditioner 
    • Extra PV requires a new, larger charge controller
  • Total 2000W of solar power 
    • Add 4 more 123W Sharp Photovoltaic panels
    • Total 16 panels 
  • Outback Power Components 
    • Addition of FM80 MPPT Charge Controller 80A@24V
    • Retired MX60 MPPT Charge Controller 60A@24V
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The system was further upgraded in June 2011:
  • Outback Power Components 
    • Addition of FlexNet DC and shunts for logging
    • Firmware upgrade of MATE system controller
  • The system was now ready for computer analysis of logged data
    • 24/7 logging on Apple Clamshell iBook 233MHz PPC603
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