Introduction

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Introduction

Postby Sydney westie » Tue Jan 26, 2016 1:13 pm

I have a 2kW PV array :12 x 170w Suntech modules with a Latronics PVE 2500 inverter installed Aug 2008.
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Re: Introduction

Postby Gordon-Loomberah » Tue Jan 26, 2016 2:32 pm

Welcome to the Energy Matters Forums Sydney Westie :)

How is your system performing relative to when you had it installed?
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
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Re: Introduction

Postby Sydney westie » Wed Jan 27, 2016 10:12 am

From my electricity bills the annual solar contribution in kWh : 2580 2484 2404 2264 2639 2525 2480. The fourth figure is affected by a circuit breaker failure in the inverter while I was away on holidays. After the repair production went up apparently but seems to be declining again. I realise that weather variations and panel cleanliness are also factors but maybe the circuit breakers after destined to fail again.
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Re: Introduction

Postby Gordon-Loomberah » Wed Jan 27, 2016 11:01 am

I chose the Penrith Lakes area, which shouldnt be too far away from you, as the data source- here are the annual global solar exposure estimates in kWh per square metre for 2009 to 2015, along with your output in kWh.

Year .. kWh... kWh/m^2
2009.. 2580... 4.5
2010.. 2484... 4.2
2011.. 2404... 3.9 (lowest ever [since 1990], ie a very cloudy year)
2012.. 2264... 4.3
2013.. 2639... 4.6
2014.. 2525... 4.3
2015.. 2480... 4.2

Of course the global solar radiation is for a detector facing straight up (or an estimate based on satellite imagery in this case), and your panels are unlikely to be mounted like that, but it will give a general idea.
I'd say your system is performing quite well! :) A failing circuit breaker was just coincidental and reduced output doesn't indicate immenent failure, if it is working, it wont be costing you any output, and if it was replaced by a good quality unit, should continue to function for many years.
http://gunagulla.com Loomberah weather and astronomy including live solar radiation intensity and UV + Gunagulla aquaponics, organic eggs and cherries
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