Mankowski Homes
Investment Breakdown · Project Awarded

What the project costs — and what the federal government refunds

The base project total is $379,631.47. The 87.3 kWh battery is confirmed as part of the awarded scope; total with battery is $498,718.27.

Base project

Line-item investment

Every dollar in the awarded scope, broken out line by line.

A. Rooftop Solar System — 85.14 kW
$308,138.40
B. Building 1 Roofing System
$29,526.32
C. Building 2 Roofing System
$17,894.75
D. Windows & Doors
$14,392.00
E. 200A → 400A Main Service Upgrade
$3,520.00
F. Rooftop Solar Trenching
2 runs at 40 LF each
$6,160.00
Base Project Total
$379,631.47
G. 87.3 kWh Battery Energy Storage System
Confirmed — included in awarded scope
$119,086.80
Total with 87.3 kWh Battery
$498,718.27
Negotiated discounts

$23,559.54 total savings vs. original bid

Roofing and envelope pricing have been revised down from the original proposal.

Roofing discount
$18,473.67
~27.9% off original
Building 1: $40,894.74 → $29,526.32
Building 2: $25,000.00 → $17,894.75
Total: $65,894.74 → $47,421.07
Windows & Doors discount
$5,085.87
~26.1% off original
Original: $19,477.87 → $14,392.00
Scenario Analysis

Net project cost at three Direct Pay levels

Eligible basis (rooftop solar PV + main service upgrade + rooftop trenching + battery) is $436,905. Refunds are federal cash, not a credit.

30% Direct Pay
Confirmed
$131,072
refunded federal cash
Base total$379,631
Direct Pay refund– $131,072
Net project cost$367,647

Base §48 ITC. Floor case the board can plan on.

40% Direct Pay
Likely
$174,762
refunded federal cash
Base total$379,631
Direct Pay refund– $174,762
Net project cost$323,956

Base + Energy Community adder. Pending IRS map confirmation.

50% Direct Pay
Potential
$218,453
refunded federal cash
Base total$379,631
Direct Pay refund– $218,453
Net project cost$280,266

Base + Energy Community + Domestic Content. Requires vendor attestation.

Important: Incentive assumptions are never presented as guaranteed. The 30% base is confirmed for IRA §48 ITC nonprofits via elective pay. The +10% adders (Energy Community, Domestic Content) require documentation and CPA confirmation. Final allocation determined by EPC and CPA at project closeout.
Battery — Confirmed Scope

87.3 kWh Battery Energy Storage System

Confirmed as part of the awarded project. Battery price of $119,086.80 is included in the Total with Battery shown above.

Selected
87.3 kWh Battery Energy Storage System (Grid-Tied)
$119,086.80
Included in awarded scope · 87.3 kWh capacity
Proposal Comparison

Previous contractor proposal vs. current proposal

These two proposals are NOT apples-to-apples. The current proposal is a significantly larger and more capable scope.

Previous Contractor

Original proposal

$415,800
Total bid
Scope
  • 74 kW Rooftop Solar
    Smaller system, single roof scope
  • Roofing
    Buildings 1 & 2
  • Electrical Upgrades
    Service upgrade
Recommended
Current Proposal

Solar Aurora + GreenCal (2026)

$379,631
Base total before Direct Pay refund
Scope
  • 85.14 kW Rooftop Solar
    +15% larger system than previous
  • Roofing — Buildings 1 & 2
    Cool Roof — discounted from original bid
  • Windows & Door Package
    New — Anlin Catalina envelope upgrade
  • 200A → 400A Service Upgrade
    Required for solar + battery
  • Rooftop Solar Trenching
    2 runs at 40 LF each
Why the price difference exists

The current proposal is a larger rooftop solar system than the previous bid, paired with a service upgrade, replacement roofing, and a full Anlin window & door package. Roughly $436,905 of this scope is Direct Pay eligible, returning $131,072–$218,453 in federal cash refund.