10
%
×
100
W
/
m
2
×
200
m
2
i
n
i
m
e
s
e
k
o
h
t
a
≃
50
k
W
h
/
p
ä
e
v
a
s
/
i
n
i
m
e
s
e
k
o
h
t
a