Feb. - PVG Solutions

Consortium
Demonstration Test of Bifacial PV System to
effectively use Hokkaido‘s regional characteristics
Tie-UP Business
Feb. 2014
Monthly Evaluation Report (1)
Measurement Term : Feb 1 ~ 28, 2014
( Data missing: 1 days)
Issue Date ：Mar 7, 2014
Issued By : PVG Solutions Inc,
■
Kitami
City
Monthly Measurement Result (System Performance Ratio(PR))
Test Condition
Module Model Name
Cell Type
Bifacial(Snow Reflection)
(No snow season：Scallop shells)
Bifacial(Snow Reflection)
(No snow season：Grass)
Monofacial(Estimate)
■
Cooperation
System PR
EarthON 254
Bifacial(n-type Mono)
0.97
EarthON 254
Bifacial(n-type Mono)
0.98
－
Monofacial (n-type Mono)
0.83
Monthly Evaluation Result
① Bifacial Effect：Comparison of PR with Monofacial Generated Power
Increase from Bifacial(Snow Reflection)(No snow season：Scallop shells)
16.9[%]
Increase from Bifacial(Snow Reflection)(No snow season：Grass)
Mounting System：ITOGUMI‘s TIS･S
18.1[%]
Array Capacity: 3.048 kw
Kitami Site
Snow Reflection
(No snow season : Grass)
Snow Reflection
(No snow season : Scallop shells)
Transition of System PR
両面受光ホタテ
Bifacial Scallop
1.4
System PR [-]
1.2
23.7%
両面受光芝
Bifacial Grass
16.7%
5.7%
18.9%
6.7%
23.3%
11.6%
Apr
May
Jun
1.0
20.9%
7.0%
Blue Increase ratio of Scallop side
Monofacial
片面受光(日射量からの推定値)
Green Increase ratio of Grass side
(Estimated from Irradiation)
19.3%
4.5%
17.0%
8.0%
12.1%
4.4%
13.3%
5.6%
22.8%
21.5%
Oct
Nov
Dec
16.1%
18.4%
16.9%
18.1%
0.8
0.6
0.4
0.2
0.0
Mar
3月
4月
5月
6月
Jul
7月
Aug
8月
Sept
9月
10月
11月
12月
Jan
1月
Feb
2月
System Performance Ratio = PR
describes how much power has been generated in comparison with the PV module's Pmax.
It is a figure that can be used to fairly compare PV modules that are installed at different conditions.
（It shows the amount of actual generated power [kWh] per PV module's Pmax 1[kW], when 1[kWh/m 2]
sunlight is received.）
PR ＝ Actual generated power [kWh] ÷ （Rated Pmax [kW] × In-plane Irradiation[kWh/㎡] ）
*The Pmax of Bifacial PV Module (EarthON 254) used for calculation of PR is only the front value.
*From Jan 2013, PR of Monofacial is calculated from the estimated mono generated power calculated from measured irradiation.
Please refer to Report (2) for the calculation basis.
* The PR of this document is calculated by the Pmax of IV curve tracer before the input to Power Conditioner (PCS), and does not include the PCS loss.
*The content of this document is the result at each test field and includes uncertain items from the testing site, temperature, surrounding
environment, site management method, data networks, etc. Therefore, this result does not describe the product features accurately and does not
guarantee the product performance.
*Measurement will not be carried out during any field work sand maintenances at the test site.
*Please access to http://www.pvgs.jp or http://www.facebook.com/PVG.Solutions for more details of the test at Kitami City.
*EarthON
Nisso 12th
is PVG Solutions Inc.‘s registered trademark for High Efficiency Bifacial Solar Cell.
PVG Solutions Inc
Bldg. 9F, 3-6-12 Shinyokohama, Kohoku-ku, Yokohama-shi, Kanagawa 222-0033 Japan
TEL：81-45-474-5656
Consortium
Demonstration Test of Bifacial PV System to
effectively use Hokkaido‘s regional characteristics
Feb. 2014
Monthly Evaluation Report (2)
Tie-UP Business
Measurement Term : Feb. 1 ~ 28 2014
(Data missing: 1 days)
Issued Date：Mar 7, 2014
Issued By : PVG Solutions Inc,
Cooperation
Kitami
City
Monthly Total Irradiation・Monthly generated power per 1kW system
Monthly Total
Unit
In-plane Irradiation
129.35
kWh/m2
Bifacial-Shell
125.48
kWh/kW
Bifacial-Grass
127.01
kWh/kW
Estimated Monofacial
107.30
kWh/kW
Monthly transition of generated power per 1kW system
Pm-Shell
発電量-芝
Est.
Mono power
推定片面発電量
Inn-plane
Irr
傾斜面日射
.
Daily Snow
当日降雪量
Snow Depth
積雪深
Date
100
80
60
40
20
Daily Snow
Snow Depth [cm]
Irradiation[kWh/m2]
Generated power[kWh/kW]
Pm-Grass
発電量-ホタテ
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Monthly transition of System PR
Pm-Shell
PR-芝
Est.PR-推定片面
Mono power
Inn-plane
Irr.
傾斜面日射
Daily Snow
当日降雪量
Snow Depth
積雪深
1.5
100
80
PR[-]
1.0
60
40
0.5
20
0.0
Irradiation [kWh/m2]
Daily Snow / Snow Depth[cm]
Pm-Grass
PR-ホタテ
0
Date 1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Comment
2/24 Taken
Due to snow falling, we see some degradation of PR according to snow
falling date. However we still see the superior performance of bi-facial
than mono facial.
Picture was presented by Mr. Goto at Kitami City. On the 24th, we had
more than 10 hours sunshine. Also you can see continuous snow cover.
So due to 2 big factors, we had 7.42[kWh/kW] electric power generation
from bi-facial. This is one of highest electric power generation date in Feb.
This is one of features for bi-facial at snow country.
Calculated Mono Power
Estimated Mono Generated Power calculated from Irradiation (front side only).Solar
Module temp. is estimated from irradiation and tem. loss (or gain) is calculated from
Temp. coefficients. Spectral transition, DC circuit ets. losses are calculated as 5%.
Loss from snow accretion on module surface is calculated from setting a snow load loss
coefficients on daily amount of snowfalls.
PVG Solutions Inc
Nisso 12th Bldg. 9F, 3-6-12 Shinyokohama, Kohoku-ku, Yokohama-shi, Kanagawa 222-0033 Japan
Presented by KITAMI City
Daily snowfall
9cm
6cm
3cm
1cm
or
or
or
or
above
above
above
above
Snow load loss
coefficients
0.9
0.5
0.1
0.05
TEL：81-45-474-5656

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