This is the Sol-Ark L3 HV-40 indoor battery cabinet, built for commercial energy storage projects that need rack-mounted lithium capacity without an outdoor enclosure. It carries a 40.96 kWh nameplate energy capacity and delivers 36.86 kWh usable at 90% recommended depth of discharge. It is designed to pair with the Sol-Ark 30K-3P-208V inverter, with up to 16 battery units per inverter and up to 10 inverters run in parallel.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Expert Overview
The L3 HV-40 is Sol-Ark's indoor commercial battery cabinet, built around LiFePO4 chemistry and a stacked 8s1p internal configuration inside each cabinet. It is rated for IP20 (NEMA 1) indoor use only, with a rack-mount enclosure finished in powder-coated steel. Certifications listed by the manufacturer include UL1973, UL9540, UL9540a, UN38.3, FCC, and Prop 65. The BMS governs charge and discharge current, and temperature-based derating is built into the control logic — details below.
Battery Characteristics
- Chemistry: Lithium Iron Phosphate (LiFePO4)
- Enclosure / Rating: Indoor Battery Energy Storage System, IP20 (NEMA 1), rack-mount, steel powder-coated finish
- Nameplate Energy Capacity (DC): 40.96 kWh
- Usable Energy Capacity (DC): 36.86 kWh at 90% recommended depth of discharge
- Battery Pack Internal Configuration: 8s1p
- Battery Module Nominal Voltage / Capacity: 51.2V / 100Ah, 5.12 kWh per module
Wiring & Configuration Limits (Series/Parallel)
The L3 HV-40 cabinet is designed as a matched system component for the Sol-Ark 30K-3P-208V inverter. Up to 16 battery units can be run per inverter, and up to 10 inverters can be paralleled. The internal battery pack configuration is fixed at 8s1p by the manufacturer — this is not a field-adjustable series/parallel wiring project like a standalone 12V/24V battery bank.
NOT compatible with: outdoor installation (this is the IP20 indoor-rated cabinet, not the IP55/NEMA 3R outdoor L3 HVR-60 unit); use as a starter or automotive battery; standard lead-acid chargers; mixing with non-Sol-Ark battery modules or inverters outside the compatible model line listed by the manufacturer.
Pro-Installer Tip
Commercial lithium racks like the L3 HV-40 fail early for one predictable reason: charging attempted while the pack is cold. The manufacturer's data states charging is disabled below 0C (32F), and output is derated above 45C (113F) cell temperature as measured by the BMS. If a site controller or generator start sequence pushes a charge cycle before the cabinet has equalized to ambient indoor temperature, the BMS will lock out charging entirely, and repeated cold-attempt cycling accelerates cell imbalance across the 8s1p pack. Confirm cabinet temperature with a shunt-based monitor or the BMS's own state-of-charge/temperature readout before enabling charge current, and keep discharge cycling within the manufacturer's 90% recommended depth of discharge to protect long-term throughput life (10 years or 130MWh throughput, per the warranty terms).
Key Benefits
- 10-year or 130MWh throughput warranty on the indoor L3 HV-40 cabinet
- 94% roundtrip efficiency (DC charge/discharge at 25C, 0.5C) per manufacturer data
- Modular scaling: up to 16 battery units per inverter, up to 10 inverters in parallel for larger commercial arrays
- UL1973, UL9540, UL9540a, and UN38.3 certifications on the L3 Series
- Amphenol SurLok push-lock connectors for terminal connections
Technical Table
| Spec | Value |
|---|---|
| System Nominal Voltage (DC) | 410V |
| System Operating Voltage (DC) | 392V -- 448V |
| Nameplate Energy Capacity (DC) | 40.96 kWh |
| Usable Energy Capacity (DC) | 36.86 kWh |
| Battery Module Voltage / Capacity | 51.2V / 100Ah (5.12 kWh per module) |
| Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Battery Pack Internal Configuration | 8s1p |
| Recommended Continuous Charge/Discharge Current (DC) | 50A |
| Max. Continuous Charge/Discharge Current (DC) | 100A |
| Peak Discharge (60 sec @ 25C) | 125A |
| ESS Max. Continuous Charge/Discharge Power (AC) | 40.96kW |
| Recommended Depth of Discharge | 90% |
| Roundtrip Efficiency (DC, 25C, 0.5C) | 94% |
| Operating Temperature & Humidity | 4C -- 43C (40F -- 110F), 5%--85% RH |
| Ingress Rating | IP20 (NEMA 1) |
| Product Dimensions (WxDxH) | 58x58x163 cm (23x23x64 in) |
| Net Weight | 434 kg (957 lbs) |
| Terminal Type | Amphenol SurLok - Push Lock Connector |
| Performance/Product Warranty | 10 years or 130MWh Throughput |
| Certifications | UL1973, UL9540, UL9540a, UN38.3, FCC, Prop 65 |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
The L3 HV-40 is designed to pair with the Sol-Ark 30K-3P-208V compatible inverter model. Up to 16 battery units are supported per inverter, and up to 10 inverters can run in parallel for larger installations. Charging is disabled below 0C (32F) per the BMS, and derating occurs above 45C (113F) — this is not a battery that tolerates freezing-temperature charge attempts. Above 2000m altitude, maximum charge/discharge output is derated from 1C to 0.8C per manufacturer data; contact Sol-Ark for site-specific guidance above that altitude.
NOT included: the compatible Sol-Ark inverter, communication cabling, or mounting hardware beyond what is described in the manufacturer's installation guide. NOT compatible with: outdoor deployment (use the IP55-rated L3 HVR-60 outdoor unit instead), starter/automotive applications, or non-Sol-Ark inverter pairings outside the documented compatible model.
FAQ
Q: What chemistry does the Sol-Ark L3 HV-40 use?
A: Lithium Iron Phosphate (LiFePO4).
Q: Can this battery be installed outdoors?
A: No. The L3 HV-40 is rated IP20 (NEMA 1) for indoor use only. Sol-Ark's outdoor-rated equivalent is the IP55 (NEMA 3R) L3 HVR-60.
Q: What inverter does the L3 HV-40 pair with?
A: The Sol-Ark 30K-3P-208V inverter. Up to 16 battery units are supported per inverter, with up to 10 inverters in parallel.
Q: Does this battery charge in cold weather?
A: No. Per manufacturer data, charging is disabled below 0C (32F), and output derates above 45C (113F) based on average cell temperature as measured by the BMS.
Q: What is the usable capacity versus nameplate capacity?
A: Nameplate energy capacity (DC) is 40.96 kWh; usable energy capacity (DC) is 36.86 kWh at the manufacturer's recommended 90% depth of discharge.
Warranty & Support
Sol-Ark lists a 10-year product warranty and a 10-year or 130MWh throughput performance warranty (end-of-life defined as 70% retained capacity) for the L3 Series. Full warranty terms, the installation guide, and datasheets are available in the "Resources (System Manuals and Warranty)" Tab above. If you have questions about sizing this cabinet into a larger Sol-Ark array before you order, ask us — we always reply back.
