Non-Lithium BESS for Water & Wastewater: Cutting Bills, Avoiding Upsets, and Building True Resilience
By Alpha Water & Power • October 2025 • United States Analysis
Summary: Water and wastewater utilities can reduce energy spend and protect biology by deploying non-lithium, long-duration battery energy storage (4–12 hours). These chemistries enable safer siting near critical equipment, monetize demand response, and—via federal Direct Pay—unlock Investment Tax Credits for public entities.
The challenge
Power is the largest O&M line item for many plants; peaks and short outages trigger both costs and process upsets. [1][2][3][5]
The innovation
Non-lithium BESS (VRFB, iron-flow, aqueous zinc, sodium-ion, NAS) delivers 4–12 h discharge with safer siting and UL/NFPA compliance. [7][8][9][10][14-18]
The impact
Lower demand charges and TOU costs, earn DR revenue, and ride through events without biological upsets—now with ITC Direct Pay. [11][12][13]
Problem
Energy is eating the water budget
Water/wastewater can account for roughly
30–40% of municipal energy use, making electricity the dominant O&M cost driver for many utilities.
[1][2][3] Peaks inflate bills via demand charges; TOU pricing punishes late-day aeration and pumping. Even brief sags and outages can cause
process upsets, violations, and costly restarts.
[5]
“Biology doesn’t care about your tariff window. If power blinks, operators eat the risk. Storage gives us a buffer between the grid and the bugs.” — Senior Engineer, Alpha Water & Power
Solution
Non-lithium long-duration storage built for plants
Non-lithium chemistries—
VRFB,
iron-flow,
aqueous zinc,
sodium-ion, and
NAS—offer 4–12 hour discharge, high cycle life, and no thermal-runaway failure mode. Certified
UL 9540/9540A systems installed under
NFPA 855 and
IFC §1206 support safer siting near process areas and chemical rooms.
[7][8][9][10][14-18]
Case in point: Microgrid controls demonstrated at Laguna WWTP show ride-through and seamless transfer are achievable in real plants. [6]
Process
How the savings stack on a real bill
| Value Stream |
Mechanism |
Typical Inputs |
| Demand charges |
Discharge through top 15-minute peaks to reduce billed kW. |
ΔkW × $/kW-mo × 12; peak coincidence and variability matter. |
| TOU arbitrage |
Charge off-peak; discharge on-peak to capture spread. |
(On-peak – Off-peak $/kWh) × kWh × cycles × RTE. |
| Demand response |
Enroll capacity; dispatch during events to earn incentives. |
Program rules (e.g., ConnectedSolutions), availability, M&V. [13] |
| Outage avoidance |
Ride-through & controlled islanding prevent upsets/violations. |
Critical load kW/kWh, event frequency/duration, restart costs. [5] |
Operator-first controls: Reserve SOC bands, seamless transfer, and microgrid logic preserve biology while maximizing tariff savings. [5][6]
Safety & Compliance
Siting near critical equipment—with the right paperwork
AWP delivers systems with
UL 9540 listings and
UL 9540A test reports, installed per
NFPA 855 and
IFC §1206—the documentation your AHJ will ask for.
[7][8][9][10]
“Bring your AHJ into the process early. With UL 9540A data and NFPA 855 basis-of-design, siting near process areas becomes a code conversation—not a guessing game.” — AWP Compliance Lead
Finance
Public agencies can now capture the ITC via Direct Pay
Under the Inflation Reduction Act, standalone storage qualifies for the
Investment Tax Credit, and public/non-taxable entities can receive it as a cash refund via
Elective Pay (Direct Pay).
[11][12] Add-ons (domestic content, energy community) may further enhance value where applicable.
Bottom line: ITC + bill savings + DR revenue compress payback and de-risk long-duration choices in municipal settings.
What We Deliver
AWP’s turnkey scope for utilities
- Chemistry-agnostic design: VRFB, iron-flow, aqueous zinc, sodium-ion, NAS—right-sized for 4–12 h duty. [14-18]
- Process-aware controls: Reserve SOC, seamless transfer, microgrid controller, and SCADA integration. [5][6]
- Compliance package: UL 9540/9540A, NFPA 855, IFC §1206 submittals; measurement & verification.
Alpha Water & Power designs, builds, and integrates storage to match the real operating profile of water and wastewater plants—so savings don’t come at the expense of biology.
[19]
Next Step
Free savings screen for your facility
Send us:
- 12–24 months of 15-minute interval load (CSV) and 12 months of bills; current tariff sheet
- Critical loads (kW/kWh), outage history; one-line & site constraints
- Demand response territory (if known)
We’ll model stacked value across chemistries/durations and return a ranked shortlist with expected ROI/payback.
