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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).Whittier, Boulder, 2025
Two mature cottonwoods put moving shade across the south plane every afternoon from May. The string design lost 24 percent; microinverters lost 6 percent.
Whittier, BoulderHow it went
Two protected cottonwoods to the south-west put dappled shade across three of the eleven module positions from mid-May to early October, worst between 3 pm and sunset. Removing the trees was neither possible nor, frankly, desirable.
In series, the string runs at one operating point. A module at 40 percent shade has one substring bypassed and the next partially shaded, which pulls the current of every module wired with it. The annual model came out at 24.1 percent loss.
With one inverter per module, each panel runs at its own maximum power point and the shaded panels only lose their own output. Modelled loss dropped to 6.3 percent, for $690 more in hardware.
The worst case was not full shade. A module sitting under 40 percent dappled shade cost the string more than one in complete shadow, because complete shadow simply bypasses out of the circuit while partial shade drags the current.
They showed us the maths for both options and let us decide. The trees stayed and the system still works.
6,090 kWh in year one, within 1.4 percent of the shaded model.
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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