Residential homes use off-grid 10kw whole house solar power system

Whole House solar Power System

Solar Power / September 28, 2015

Owner: Anil & Naomi Navkal

Type: Single-Family Residence

Address: 14 Rock O Dundee Rd, Andover, MA 01810

Size: 3, 500 sq ft

Energy need met: 100% or more of electricity

Designations: Deep energy retrofit Passive house

Event Participation: NESEA Green Buildings Open House 2013 Host

Type: Solar PV

Purposes: To generate electricity

Gross Cost of System: $44, 000

Value of Rebates: $6, 000

Value of Tax Credits: $15, 000

Net Cost of System: $22, 000

Annual Savings: $1, 280

Annual Revenue: $1, 500

Own or Lease: Cash Purchase


Recently we have added a whole house generator to provide backup power. This makes the system quite unique as not too many folks have all three in one place. It is required to isolate PV system under outage conditions. To do this using standard Transfer Switch and yet meet the electric code, without violating Warranty was the tricky part

Other Benefits:

Enphase gives you on line per module monitoring. Very helpfull!

Maintenance Requirements:

None so far.

Efficiency or Sustainability Improvements:

Radiant Heat, Tankless Hot water, 8 zones for heat, 3 separate A/C units for air conditioning.


Do you homework. Talk to folks who have PV. They all love to share their experience. Ask them what they could do differently if they were to start all over.

Experience with Installer:

Simply great!

Open House Info:

Come on down. Ring the bell, if we open the door, the house is open house!

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