Mankowski Homes
Project Catalog · Awarded Scope

Every component in the awarded project

Pricing reflects the latest negotiated proposals on file. The 87.3 kWh battery is confirmed as part of the awarded scope and shown alongside the base components.

9 Battery Modules · 87.3 kWh · Grid-Tied

Why the campus needs the full 87.3 kWh battery system

The 87.3 kWh storage system is built from 9 lithium modules working in unison — turning rooftop solar into evening-peak demand-charge protection for the campus. This is a grid-tied system; it is not a backup/standby system and does not power the buildings during a grid outage.

Board Decision Required — Battery Budget

Approved set-aside is roughly 4× too low for the recommended system

Board-approved set-aside
$35,000
Current battery budget on the books
Recommended — 87.3 kWh / 9 modules
$119,086.80
What it takes to capture the demand-charge savings
Additional approval needed
$84,086.80
~3.4× the current set-aside

A $35K-sized battery cannot meaningfully shift solar into the 4–9pm peak — the entire economic case for storage (demand-charge avoidance, peak shaving, solar self-consumption) depends on having enough capacity to cover the campus through the SCE peak window. The 87.3 kWh / 9-module system is sized to that window and is §48 ITC-eligible when charged from solar.

Solar87.3 kWh · 9 MODULES · GRID-TIED010203040506070809🏠Campus Loads📉Demand-Charge Relief🌙Evening Peak ShiftSOLAR → STORAGE → PEAK-HOUR DISCHARGE (GRID-TIED, NOT BACKUP)
Demand-charge reduction
Discharges during the 4–9pm SCE peak window, cutting the campus's most expensive kWh.
Peak shaving
Flattens HVAC and resident-load spikes so the 400A service never trips its demand ceiling.
Solar self-consumption
Stores midday rooftop solar surplus and releases it after sundown — far higher value than exporting to grid.
Load management
Coordinates campus electrification so loads can grow without another service upgrade.
Cleaner grid hours
Shifts consumption off the dirtiest fossil-peaker hours, lowering the campus's true carbon footprint.
Future-proof capacity
Headroom for added electrification — induction kitchens, heat-pump conversions — without re-engineering.
Rooftop Solar System — 85.14 kW
Solar Direct Pay

Rooftop Solar System — 85.14 kW

85.14 kW DC rooftop SolarEdge PV system spanning Buildings 1 & 2 — engineered by Green Cal, Inc. (Solar Aurora design 2026-06-13). PV equipment only; electrical infrastructure is broken out as separate line items.

Investment
$308,138.40
Useful life
25+ year panel warranty, 12 yr inverter
Benefits
  • Offsets the vast majority of campus daytime load
  • Locks in a known energy cost for 25 years
  • Fully Direct Pay eligible — 30–50% federal cash refund
  • SolarEdge module-level optimization preserves output under partial shading
What's included
  • Roof-mounted modules with SolarEdge optimizers across both buildings.
  • String inverter(s) wall-mounted at the main service.
  • Production monitoring portal handed to the campus on PTO.
Direct Pay: Generation equipment, racking, inverters, conductors, and balance-of-system are §48 ITC property and qualify for elective pay (Direct Pay).
Building 1 Roofing System
Roofing
Capital Investment Under Allocation Review

Building 1 Roofing System

Full tear-off and re-roof of Building 1 — Owens Corning Total Protection System, Cool Roof Collection. Includes discount from original bid.

Investment
$29,526.32
Useful life
30+ years (Platinum warranty)
Benefits
  • Prerequisite to warranty-protect rooftop solar
  • Cool Roof shingles reduce attic heat load (20+ SRI)
  • Owens Corning Platinum Protection eligibility
What's included
  • Tear off to wood deck; replace damaged decking per Azusa code.
  • Owens Corning Rhino U-20 underlayment; TruDefinition Duration Cool Roof shingles.
  • Discounted from original $40,894.74 (savings $11,368.42).
Allocation note: Status: Under Allocation Review. Certain portions may qualify if determined to be necessary for solar interconnection and operation.
Building 2 Roofing System
Roofing
Capital Investment Under Allocation Review

Building 2 Roofing System

Full tear-off and re-roof of Building 2 — Owens Corning Total Protection System, Cool Roof Collection. Includes discount from original bid.

Investment
$17,894.75
Useful life
30+ years (Platinum warranty)
Benefits
  • Prerequisite to warranty-protect rooftop solar
  • Cool Roof shingles reduce attic heat load
  • Replaces end-of-life roofing regardless of solar decision
What's included
  • Tear off to wood deck; replace damaged decking per Azusa code.
  • Discounted from original $25,000.00 (savings $7,105.25).
Allocation note: Status: Under Allocation Review.
Windows & Doors
Windows
Capital Investment Under Allocation Review

Windows & Doors

Anlin Catalina Series ENERGY STAR® windows and door package — Double Lifetime Warranty. Includes discount from original bid.

Investment
$14,392.00
Useful life
Lifetime warranty (transferable once)
Benefits
  • Cuts heating/cooling load — directly reduces utility bills
  • ENERGY STAR® certified, NFRC / AAMA tested
  • Improves resident comfort and noise insulation
  • Anlin Double Lifetime Warranty transfers once
What's included
  • Remove and dispose existing windows + door per plot plan.
  • Anlin Catalina vinyl windows with Next Generation Glazing.
  • Discounted from original $19,477.87 (savings $5,085.87).
Allocation note: Status: Under Allocation Review.
200A → 400A Main Service Upgrade
Electrical Direct Pay

200A → 400A Main Service Upgrade

Main service upgrade from 200A to 400A — required to support rooftop PV, carport, EV charging, and battery.

Investment
$3,520.00
Useful life
40+ years
Benefits
  • Required to safely run rooftop PV + carport + EV + battery
  • Replaces aging service equipment
  • Unlocks future load expansion
Direct Pay: Integral to energy property — §48 ITC eligible.
Rooftop Solar Trenching
Electrical Direct Pay

Rooftop Solar Trenching

Two trench runs at 40 LF each connecting the rooftop PV system to the main service.

Investment
$6,160.00
Useful life
40+ years
Benefits
  • Required to interconnect rooftop PV to main service
What's included
  • 2 runs × 40 LF — conduit, conductors, restoration.
Direct Pay: Integral to energy property — §48 ITC eligible.
87.3 kWh Battery Energy Storage System (Grid-Tied)
Electrical Direct Pay

87.3 kWh Battery Energy Storage System (Grid-Tied)

87.3 kWh lithium battery storage — GRID-TIED ONLY (not a backup/standby system). Paired with solar for demand-charge reduction, peak shaving, solar self-consumption, and load management. Does not provide power during a grid outage.

Investment
$119,086.80
Useful life
10–15 years
Benefits
  • Demand-charge reduction (4–9pm SCE peak window)
  • Peak shaving on the 400A service
  • Solar self-consumption — store midday surplus, use at night
  • Load management coordination with EV chargers
  • Future headroom for added EVs & electrification
Direct Pay: Battery is §48 ITC-eligible when charged primarily from solar. Grid-tied configuration — no islanding / backup function.
Confirmed — Included in Awarded Scope · Grid-Tied

87.3 kWh Battery Energy Storage System

The 87.3 kWh battery is confirmed as part of the awarded project. It is a grid-tied system that unlocks demand-charge reduction, peak shaving, solar self-consumption, and load management. It does not provide backup power during a grid outage.

G
Selected

Option G — 87.3 kWh Battery Energy Storage System (Grid-Tied)

$119,086.80
Optional add-on — base project $379,631.47 · total with battery $498,718.27
Capacity
87.3 kWh
Useful life
10–15 yrs
Purpose
  • Demand-charge reduction
  • Peak shaving
  • Solar self-consumption
  • Load management
Board guidance: Grid-tied storage that shifts solar into the evening peak and protects the campus from demand charges. Does NOT provide backup power during a grid outage. Direct Pay treatment applies when the battery is charged primarily from solar.