Store power, cut costs: Sol-Ark L3-HV-40 Indoor Battery Bank
Why You'll Love The Sol-Ark L3-HV-40 Indoor Battery Bank
-
Real commercial storage in one cabinet. 40.96 kWh of nameplate capacity — 36.86 kWh usable — of safe LiFePO4 chemistry, sized to keep your operation running and to shift energy away from your most expensive hours.
-
Safety engineered in, not bolted on. Built-in module and cabinet fire suppression, plus UL 9540 and UL 9540a listings, make this battery straightforward to permit and to live with inside a commercial building.
-
Scales to megawatt-hours. Stack up to 16 cabinets per inverter and parallel up to 10 inverters — 300kW AC and 6.4 MWh of storage — so the system grows with the business rather than being replaced.
-
Built to earn its keep for a decade. A 90% depth of discharge, 94% round-trip efficiency and a 10-year (or 130 MWh throughput) performance warranty keep your cost per usable kWh low over the long haul.
Your business, with the Sol-Ark L3-HV-40 Indoor Battery Bank
For a commercial site, stored energy does two valuable jobs. It keeps you running when the grid fails, and it lets you sidestep the demand peaks that quietly dominate your utility bill.
The Sol-Ark L3-HV-40 is built to do both, paired with the Sol-Ark 30K-3P-208V inverter. Through the day it stores solar or off-peak energy; at your peak-demand hours it discharges to shave those spikes; and when the grid goes down it keeps your critical loads live.
It's designed for the realities of an indoor commercial install. LiFePO4 chemistry is inherently stable, and Sol-Ark adds fire suppression at both module and cabinet level — the kind of detail that makes an AHJ and an insurer comfortable. At under 40 dBA it's quiet enough for an occupied building, and the freestanding rack footprint is compact at 23 × 23 inches.
There's less to wire and less to source, too.
A 200A DC disconnect and a 160A internal fuse are built into the cabinet, so a lot of the balance-of-system that usually sits alongside a commercial battery is already handled. Each cabinet is a 410V nominal bank of eight 5.12 kWh LiFePO4 modules, communicating over CAN 2.0 / RS485.
And the growth path is genuinely long. Start with a single 40.96 kWh cabinet, add up to 16 per inverter, and parallel up to 10 inverters for 6.4 MWh of storage and 300kW of AC power — with peak shaving, DER-program participation and grid sell-back all supported as your strategy develops.
The Sol-Ark L3-HV-40 Indoor Battery Bank in a nutshell:
-
40.96 kWh LiFePO4 (36.86 kWh usable) — purpose-built to pair with the Sol-Ark 30K-3P-208V inverter.
-
Built-in fire suppression, UL 9540a listed — engineered for safe indoor commercial installation.
-
Integrated 200A DC disconnect & 160A fuse — fewer external components and a cleaner install.
-
Scales to 6.4 MWh / 300kW AC — up to 16 cabinets per inverter, 10 inverters in parallel.
Sol-Ark L3-HV-40 Indoor Battery Bank specifications
Battery Model / SKU
L3 HV-40 (ESS model L3 HV-40KWH-30K) / SKU L3-HV-40KWH
Compatible Inverter
Sol-Ark 30K-3P-208V
Cell Chemistry
Lithium Iron Phosphate (LiFePO4)
Nameplate Energy Capacity (DC)
40.96 kWh
Usable Energy Capacity (DC)
36.86 kWh (at 90% depth of discharge)
System Nominal Voltage (DC)
410V (operating range 392 – 448V)
Battery Pack Configuration
8s1p — eight 5.12 kWh modules (51.2V / 100Ah each)
Charge / Discharge Current (DC)
50A recommended / 100A max continuous / 125A peak discharge (60s @ 25°C)
Battery Max Continuous Power (DC)
40.96 kW
ESS Max Continuous Power (AC)
30 kW
Round-Trip Efficiency (DC)
94% (25°C, 0.5C)
Recommended Depth of Discharge
90%
Built-In DC Disconnect / Internal Fuse
200A disconnect / 160A fuse
Scalability
Up to 16 battery cabinets per inverter; up to 10 inverters in parallel — 300kW AC / 6.4 MWh
Fault Current Contribution per Battery
4,200A / 1.47 ms
Communication Ports
CAN 2.0 / RS485
Dimensions (W × D × H)
58 × 58 × 163 cm (23 × 23 × 64 in)
Net Weight
628 kg (1,384 lbs)
Mounting
Freestanding rack mount — powder-coated steel
Ingress Rating
IP20 (NEMA 1) — indoor installation only
Operating Temperature & Humidity
4°C – 43°C (40°F – 110°F), 5% – 85% RH
Operating Altitude
3,000 m (9,843 ft)
Noise Level @ 1 m
Under 40 dBA at 30°C (86°F)
Seismic Mounting
Up to Category F
Fire Suppression
Built-in module and cabinet fire suppression
Warranty
10 years or 130 MWh throughput (performance); 10 years (product)
Certifications
UL 1973, UL 9540, UL 9540a, UN 38.3, FCC, Prop 65
Let the experts help you find your perfect battery bank
Not sure how many Sol-Ark L3-HV-40 cabinets your site needs, or how they pair with the 30K-3P-208V inverter? We're here to help you scope the storage properly the first time.
Chat via Email — support@kratopower.com
Chat on the Phone — +1 (888) 855-7286
Sol-Ark L3-HV-40 Indoor Battery Bank documents and materials
California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov.
The information on this page is provided for general guidance only and should not be taken as professional, electrical or medical advice. The Sol-Ark L3-HV-40 is a high-voltage lithium-ion battery energy storage system weighing 1,384 lbs, rated IP20 for indoor installation only. It must be specified, installed and commissioned by a suitably qualified and licensed contractor in line with the manufacturer's installation manual, its compatible Sol-Ark inverter, and your local codes; commercial energy storage normally requires permits, fire-code compliance and utility approval. Every site is different, so if you have any doubt, please consult a qualified professional before purchasing or installing. Products are used at your own risk.
