Enphase Solar PV Installation & Storage design
Training (Enphase Energy System) 3.0 Certification
Complete Exam Study Guide | Guarantee Pass
1. Which component of the Ensemble system detects a grid failure?
A. Envoy
B. Enpower
C. Encharge - ANSWER B. Enpower
2. Do we need to install an additional service disconnect if the Enpower main
service breaker has been installed as the main service disconnect?
A. No, it is not necessary to install an additional disconnect
B. It depends on the use case
C. Yes, it has to be redundant and serve as a rapid shutdown initiation
device - ANSWER A. No, it is not necessary to install an additional
disconnect
3. Why does Enpower need a Neutral Forming Transformer to operate during
the grid outage?
, A. Because NEC 2017 requires a transformer to have reference to
Neutral
B. Because Encharge batteries operate 240 VAC line to line and split
phase power systems require a neutral
C. Because when the grid is down the micro inverters operate on 120 VA
- ANSWER B. Because Encharge batteries operate 240 VAC line to
line and split phase power systems require a neutral
The above system was initially estimated to require three Encharge 3 equivalent
to one Encharge 10 and no soft starter. After the site survey, they found that the
largest single load in the backup load center, is going to be a 3 kVA electric
motor with a start current of 32 Amps at 240 VAC for 3 seconds.
4. Is the estimated size of one Encharge 10 going to be enough to comply with
NEC 2017 710.15 (A) without using a soft starter?
A. Yes, one Encharge 10 will comply
B. One Encharge 10 is ok because NEC 2017 710.5(A) only applies to
whole home backup
C. No, it requires a minimum of 4 Encharge 3 to comply - ANSWER C.
No, it requires a minimum of 4 Encharge 3 to comply
For partial home backup the guidelines in the Ensemble planning guide
recommend the size of the energy storage system to be the largest of:
, Largest single load in the essential loads subpanel
Result of load analysis of power, surge and reactive power
5. For whole home backup what is added to the partial home backup list of
items to extract the largest?
A. No items are added, the guidelines for whole home are the same as for
partial home backup
B. Soft starters
C. Two Encharge 3
D. Two Encharge 10 - ANSWER D. Two Encharge 10
The homeowner wanted to add backup power to his PV system of 32 M250
microinverters. Load analysis requires 2 Encharge 3 by the largest single load
power and surge, 3 Encharge 3 by energy and autonomy and 3 Encharge 3 by
power, surge and apparent power demand so the energy storage size was set as
one Encharge 10. The city PV permit department suggested to re-size the
system following manufacturer's sizing guidelines.
6. What item is not complying with the manufacturer's sizing guidelines?
A. Ratio of PV size to battery size
B. Homeowner's expectation on autonomy
, C. Result of load analysis
D. Power of the largest single load - ANSWER A. Ratio of PV size to
battery size
7. True or false: PV systems with Energy storage but without backup power do
not require Enpower. - ANSWER True
8. Where do the hot conductors between Encharge and Enpower terminate?
A. In the IQ Combiner box
B. At the DER (distributed energy resource) input terminals
C. On the Encharge circuit breaker terminals
D. On the PV circuit breaker terminals
Clear my choice - ANSWER B. At the DER (distributed energy resource) input
terminals
9. What is the maximum amount of PV and storage that can be connected to
the Enpower smart switch?
A. 80A of PV and 80A of storage for a total of 160A
B. 80A of PV or 80A of storage for a total of 80A
Training (Enphase Energy System) 3.0 Certification
Complete Exam Study Guide | Guarantee Pass
1. Which component of the Ensemble system detects a grid failure?
A. Envoy
B. Enpower
C. Encharge - ANSWER B. Enpower
2. Do we need to install an additional service disconnect if the Enpower main
service breaker has been installed as the main service disconnect?
A. No, it is not necessary to install an additional disconnect
B. It depends on the use case
C. Yes, it has to be redundant and serve as a rapid shutdown initiation
device - ANSWER A. No, it is not necessary to install an additional
disconnect
3. Why does Enpower need a Neutral Forming Transformer to operate during
the grid outage?
, A. Because NEC 2017 requires a transformer to have reference to
Neutral
B. Because Encharge batteries operate 240 VAC line to line and split
phase power systems require a neutral
C. Because when the grid is down the micro inverters operate on 120 VA
- ANSWER B. Because Encharge batteries operate 240 VAC line to
line and split phase power systems require a neutral
The above system was initially estimated to require three Encharge 3 equivalent
to one Encharge 10 and no soft starter. After the site survey, they found that the
largest single load in the backup load center, is going to be a 3 kVA electric
motor with a start current of 32 Amps at 240 VAC for 3 seconds.
4. Is the estimated size of one Encharge 10 going to be enough to comply with
NEC 2017 710.15 (A) without using a soft starter?
A. Yes, one Encharge 10 will comply
B. One Encharge 10 is ok because NEC 2017 710.5(A) only applies to
whole home backup
C. No, it requires a minimum of 4 Encharge 3 to comply - ANSWER C.
No, it requires a minimum of 4 Encharge 3 to comply
For partial home backup the guidelines in the Ensemble planning guide
recommend the size of the energy storage system to be the largest of:
, Largest single load in the essential loads subpanel
Result of load analysis of power, surge and reactive power
5. For whole home backup what is added to the partial home backup list of
items to extract the largest?
A. No items are added, the guidelines for whole home are the same as for
partial home backup
B. Soft starters
C. Two Encharge 3
D. Two Encharge 10 - ANSWER D. Two Encharge 10
The homeowner wanted to add backup power to his PV system of 32 M250
microinverters. Load analysis requires 2 Encharge 3 by the largest single load
power and surge, 3 Encharge 3 by energy and autonomy and 3 Encharge 3 by
power, surge and apparent power demand so the energy storage size was set as
one Encharge 10. The city PV permit department suggested to re-size the
system following manufacturer's sizing guidelines.
6. What item is not complying with the manufacturer's sizing guidelines?
A. Ratio of PV size to battery size
B. Homeowner's expectation on autonomy
, C. Result of load analysis
D. Power of the largest single load - ANSWER A. Ratio of PV size to
battery size
7. True or false: PV systems with Energy storage but without backup power do
not require Enpower. - ANSWER True
8. Where do the hot conductors between Encharge and Enpower terminate?
A. In the IQ Combiner box
B. At the DER (distributed energy resource) input terminals
C. On the Encharge circuit breaker terminals
D. On the PV circuit breaker terminals
Clear my choice - ANSWER B. At the DER (distributed energy resource) input
terminals
9. What is the maximum amount of PV and storage that can be connected to
the Enpower smart switch?
A. 80A of PV and 80A of storage for a total of 160A
B. 80A of PV or 80A of storage for a total of 80A
