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What we install
One crew for the envelope, the mechanicals and the array, so the numbers actually add up.
Rooftop solar6 to 12 kW DC arrays sized from your last 12 months of kWh.
Home battery storage13.5 kWh usable, 5 kW continuous, wired to a protected loads panel.
Whole-home energy auditBlower door, thermal scan and a Manual J load, in one visit.
Heat pumpsCold-climate units rated at 5 degrees F, not at 47.
EV charger installLevel 2 at 48 A continuous, with a real panel load calculation.Work out your own numbers
Every tool here runs in your browser on figures you can change. Nothing is emailed to us.
Shading and inverter choiceWatch one shaded module drag a whole string, then switch topology.
Tilt and orientation yieldAzimuth by pitch, as a percentage of the Boulder optimum.
Time-of-use and batteriesShift kWh out of the 3 to 7 pm peak and price the difference.
EV charger load checkNEC 220.83 load calc and the 120 percent busbar rule.
Savings calculatorBill to array size to first-year production, step by step.The people doing the work
Eleven people, one warehouse on Pearl Parkway, and a service radius we can drive in under an hour.
About GreenLeafWhy we stopped selling panels on their own in 2019.
ProjectsSix homes, with the measured kWh a year after commissioning.
Reviews4.8 from 236 reviews across Google and EnergySage (sample).
Field notesWhat we learned on roofs in Boulder, Longmont and Niwot.
CareersThree open roles, pay ranges published (sample).North End, Louisville, 2024
A 2.4 ACH50 rebuild with a 34,800 Btu per hour design load. The tight envelope let us drop a heat pump size and put the savings into a bigger array.
North End, LouisvilleHow it went
The mechanical contractor's original proposal was a 4 ton system based on square footage. The room-by-room Manual J against Boulder County's 2 degree F winter design temperature came out at 34,800 Btu per hour, which is a 3 ton machine with room to spare.
One size smaller on the heat pump saved about $3,100 and reduced the electrical load calculation enough that the 48 A charger and the heat pump both fit on the 200 A service without load management.
With no gas meter at all, everything lands on the electric bill: space heat, water heat, cooking and roughly 9,000 miles of driving. The array at 11.4 kW DC covers 90 percent of the 17,940 kWh the house used in its first full year.
At 2.4 ACH50 this house is too tight to breathe on its own. A balanced heat recovery ventilator runs continuously at low speed, recovering most of the heat from the outgoing air.
Everyone else quoted the heat pump off the square footage. GreenLeaf did the calculation and it was a full ton smaller.
16,220 kWh produced against 17,940 kWh consumed. Ninety percent offset on an all-electric house with an EV.
Three to four hours on site, a written report in five business days, and a recommendation that might well be to spend less than you planned.
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