Part 3 of 8 – Site Assessment and PV System Size Estimation
Attempts allowed: 4
Grading method: Highest grade
Grade to pass: 3.00 out of 3.00
Time limit: 0
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Question 1 of 6
1. Question
Question 1
a) Most suitable location for the PV ArrayBased on the site plan select which location is the most suitable to install a PV Array.
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Location:
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Question 2 of 6
2. Question
Question 2
b) Adjustment of irradiation based on tilt and orientationCalculate the tilt and orientation adjusted Peak Sun Hours using the CEC tables provided into you in other supporting documents. The tilt angle and orientation can be found in the project brief and site plan.
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Tilt Angle: °
Orientation (azimuth with reference to north): °
Month PSH/Total Daily Radiation
on Horizontal Plane
(kWh/m2/day)
Source: BOM Climate Data online
Tilt and Orientation factor
(2 decimal places)
Adjusted PSH/Daily Radiation
on tilted Plane
(kWh/m2/day)
Jan 6.4 Feb 5.6 Mar 4.8 Apr 3.8 May 2.9 Jun 2.4 Jul 2.7 Aug 3.6 Sep 4.7 Oct 5.6 Nov 6 Dec 6.5
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Question 3 of 6
3. Question
Question 3
c) PV system efficiency
Estimate the system efficiency of the PV array in charging the battery. Please provide your answers in decimal (with 2 decimal places) unless otherwise specified. The module to be used can be found in the design task instructions.-
Temperature derating (decimal)
Hint: Use Trise as 35°C for flush-mounted systems or 25°C for raked racking systems.Inverter efficiency (decimal) (Use the lowest eff) Module Manufacturer tolerance
(If there is no derating put 1 i.e. there are no losses from manufacturer’s tolerance)Cable efficiency
(Estimate a reasonable value. The cable will travel from PV Array -> Inverter -> Battery)PV Array to Inverter:
Inverter to Battery:Derating due to soiling (flush-mounted system) 0.95 Total system efficiency as a decimal derate
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Question 4 of 6
4. Question
Question 4
d) Sizing of PV arrayCalculate the minimum required PV Array size to recharge the battery in one (1) day. This assumes a worst-case scenario where the other days in the week are rainy, and the system receives no irradiation) To complete this task, we require values we have previously calculated and a design month which is the month that receives the worst irradiation.
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i) Battery Capacity (from battery datasheet): kWh
ii) Total System efficiency (PV Array -> Battery from c): (decimal)
iii) Design Month (which month receives the lowest amount of daily irradiation)?
iv) Average daily irradiation during the Design Month:
v) Calculate the required minimum PV Array size to charge the battery: kW
vi) Calculate the minimum number of modules required to meet the minimum PV Array rating. (whole number)
Hint: The PV system you design in Part 4 must have at least this number of modules.
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Question 5 of 6
5. Question
Question 5
e) Location and IP rating of the battery
Based on the site plan below select which location is the most suitable to install a lithium-ion battery. Refer to the standards and manufacturer’s installation manual. Consider the IP rating and the manufacturer’s installation manual.
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Battery IP rating: IP
Battery Location:
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Question 6 of 6
6. Question
Question 6
f) Location and IP rating of the battery inverterBased on the site plan below select which location is the most suitable to install the battery inverter. Consider the locations of the PV Array and Battery. Consider the IP rating and the manufacturers installation manual.
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Battery Inverter IP rating:
Battery Inverter Location:
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