Neptune R450 MC, Руководство по установке и обслуживанию

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Appendix C
R450 Mini Collector Installation and Maintenance Guide 79
PV Array (Solar Panel) Troubleshooting
If the array is unobstructed, non-shaded, at the correct tilt angle, and in
full light between 10am and 3pm, you can verify the module
performance per the nameplate ratings for Voc and short circuit current
(ISC) as follows:
1 Set the PV(+) breaker to OPEN (OFF) position.
2 Using a volt meter, measure the Voc voltage between the PV(+) and
PV(-) terminal blocks. It should measure within 5% of the
nameplate rating in LOW to HIGH sunlight.
3 Set the PV(+) breaker to CLOSED (ON) position.
4 Using an ammeter rated for a maximum system ISC value, measure
the charging current through the PV(+) terminal. In LOW sunlight,
it should measure approximately 30% or less of the rating shown on
the nameplate; 60% or less of nameplate rating in MED sunlight;
and 60% or greater in HIGH sunlight. The degree of sunlight is
based on cloud cover and height on the horizon for that time of day
in winter. Table 21 provides the degrees of sunlight at various times
on a clear, sunny day in the winter:
Table 22 provides the degrees of sunlight at various times on a
clear, sunny day in the summer:
Table 21 Sunlight by Time of Day in the Winter
Degree of Sunlight Time Sun Capacity
LOW 7:00 a.m.-9:00 a.m. 10-30%
MED 9:00 a.m.-11:00 a.m. 30-60%
HIGH 11:00 a.m.-1:00 p.m. 60-100%
MED 1:00 p.m.-3:00 p.m. 30-60%
LOW 3:00 p.m.-5:00 p.m. 10-30%
Table 22 Sunlight by Time of Day in the Summer
Degree of Sunlight Time Sun Capacity
LOW 7:00 a.m.-9:00 a.m. 10-30%
MED 9:00 a.m.-11:00 a.m. 30-60%
HIGH 11:00 a.m.-2:00 p.m. 60-100%
MED 2:00 p.m.-5:00 p.m. 30-60%
LOW 5:00 p.m.-8:00 p.m. 10-30%