OutBack Power NorthStar NSB190FT BLUEPLUS 183Ah 12V VRLA-AGM Pure Lead Carbon Front Terminal Battery

The NorthStar NSB 190FT BLUE is a 12V AGM Thin Plate Pure Lead Carbon front-terminal battery rated at 183Ah at the 10-hour rate, engineered for applications that demand exceptional partial state of charge (PSoC) cycling, ultrafast recharge, and long service life under demanding temperature conditions. Manufactured in the USA at NorthStar Battery Company's Springfield, Missouri facility, it combines thin-plate AGM construction with lead carbon additives in the negative electrodes — a chemistry specifically developed to address sulfation and PSoC performance limitations that limit the service life of standard thick-plate AGM batteries in solar, hybrid genset, and telecom applications. Available through A1 SolarStore as a premium NorthStar AGM battery for high-cycle-demand installations.

Key specifications

• Nominal voltage: 12V
• Capacity: 183Ah @ 10hr rate to 1.80VPC @ 77°F (25°C); 180Ah @ 8hr rate to 1.75VPC
• Chemistry: AGM Thin Plate Pure Lead Carbon (TPPLC) — lead carbon additive to negative electrodes; sealed valve-regulated, non-spillable
• PSoC cyclic performance: 2,050 cycles @ 50% DoD
• Design life: 12 years @ 68°F (20°C) — EUROBAT "Very Long Life" classification
• Float voltage: 2.28 VPC @ 68°F (20°C) / 2.27 VPC @ 77°F (25°C)
• Maximum charge current: No limit
• Impedance (1kHz): 2.3 mΩ @ 77°F (25°C); conductance: 2,240 S
• Short circuit current: 6,000A
• Shelf life: Up to 24 months
• Operating temperature: -40°F to 149°F (-40°C to 65°C)
• Terminal: Female M8 × 1.25 (front terminal); torque: 71 in-lbs (8.0 Nm)
• Dimensions (L × W × H): 22 × 4.9 × 12.6 in. (560 × 125 × 320 mm); weight: 136 lbs.
• Case: High-modulus PPO plastic, flame retardant UL 94 V0, LOI ≥ 28%; non-halogenated thermally sealed; brass terminals; flame arrestors fitted into valve covers
• Certifications: UL approved; UN2800 certified; Telcordia SR4228; IEC 60896; Bellcore GR-63-Core Issue 1; DOT 49 CFR 173.159(d)(i)(ii) non-hazardous cargo — land, sea, and air; ISO 9001 and ISO 14001

Lead carbon technology and PSoC performance

The defining characteristic of the NSB 190FT BLUE is its AGM Thin Plate Pure Lead Carbon construction. In standard AGM batteries, repeated cycling at partial state of charge — the operating condition of most solar storage and hybrid genset applications — causes progressive sulfation of the negative electrode plates, which permanently reduces capacity and accelerates failure. NorthStar addresses this by incorporating lead carbon additives directly into the negative electrode material. The carbon component provides a conductive surface that prevents lead sulfate crystal formation during PSoC operation, enabling the battery to sustain 2,050 cycles at 50% DoD — a figure substantially higher than what conventional thick-plate AGM batteries achieve under the same conditions. The thin plate design also reduces internal resistance and increases surface area, which is what enables the "no limit" maximum charge current specification and the ultrafast recharge capability.

12 year design life and elevated temperature performance

The NSB 190FT BLUE carries a EUROBAT "Very Long Life" classification — defined as 12 years at 68°F (20°C) — and is built on high-modulus Polyphenylene Oxide (PPO) plastic that is specifically formulated to withstand extended elevated operating temperatures while maintaining the plate compression essential for reliable AGM operation. The operating temperature range of -40°F to 149°F (-40°C to 65°C) covers the most demanding outdoor and industrial conditions, and the 24-month shelf life allows extended storage between commissioning and deployment without requiring a maintenance charge.

Front terminal form factor

The front-terminal layout — with both positive and negative Female M8 × 1.25 terminals accessible from the same face — is designed for cabinet and rack installations where side or top access is restricted. In telecom enclosures, UPS cabinets, and modular battery racks, front-terminal batteries allow cabling, inspection, and replacement without removing adjacent units or pulling the battery from the cabinet. The slim profile (4.9 in. wide × 22 in. long) maximizes cabinet density compared to top-terminal batteries of equivalent capacity. All connections are made with standard M8 fasteners torqued to 71 in-lbs (8.0 Nm).

Series wiring for higher system voltages

The NSB 190FT BLUE is a 12V battery and must be wired in series to reach the system voltage required by inverters and charge controllers. Two units in series yield a 24V / 183Ah bank; four units yield a 48V / 183Ah bank. Capacity does not increase with series wiring — only voltage. For additional Ah at a given voltage, series strings are wired in parallel. Note that the published capacity ratings are at the 10-hour and 8-hour rates — no C20 rating is published. For solar applications with slow overnight discharge, actual deliverable capacity will be higher than the 183Ah 10hr figure; use the charge controller's absorption and float voltage settings aligned to the published 2.28 VPC float voltage at 68°F (20°C).

Applications: solar, hybrid genset, telecom, and backup

• Off-grid and hybrid solar: Lead carbon additive reduces sulfation damage from daily PSoC cycling — the primary failure mode for AGM batteries in solar storage.
• Hybrid genset systems: Ultrafast recharge capability and PSoC tolerance enable high fuel savings by allowing deeper discharge between genset run cycles.
• Telecom and UPS: Telcordia SR4228, IEC 60896, and Bellcore GR-63-Core compliance makes it a qualified replacement or upgrade for telecom-standard battery cabinets.
• Transport and remote deployment: DOT 49 CFR 173.159 non-hazardous cargo classification covers land, sea, and air shipment without hazmat restrictions.

Why choose the NorthStar NSB 190FT BLUE ?

The NorthStar NSB 190FT BLUE earns its premium position in the 12V AGM battery category through three capabilities that standard thick-plate AGM batteries cannot match at this cycle count: 2,050 PSoC cycles at 50% DoD, a "no limit" maximum charge current specification enabled by thin-plate construction, and a 12 year EUROBAT Very Long Life design rating backed by USA manufacture and ISO 9001/14001 quality management. For installations where the battery cycles frequently at partial state of charge — solar, hybrid genset, or telecom — the lead carbon negative electrode technology addresses the primary mechanism that limits standard AGM service life. Available through A1 SolarStore for buyers who need front-terminal, cabinet-ready, PSoC-optimized AGM performance.