Battery Storage Knowledge Bank

TPPL Lead Acid: Northstar

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Lead acid vs lithium ion

In general we recommend lithium ion batteries wherever possible as lead acid batteries tend to have a short life and issues with partial charging. See our full comparison of the various battery types.

There is however one exception to this and that it is the Northstar TPPL – thin plate pure lead – batteries. This is a Partial State of Charge (PSOC) battery, and is fine with partial charging.

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PSOC batteries

PSOC stands for Partial State of Charge. Most standard lead acid batteries are not PSOC capable and require full recharge after each discharge to achieve a long life.  This is not always possible in a solar application, without grid draw-down. A PSOC battery does not require a full recharge every cycle. As a result the batteries have a much longer life, particularly in solar applications.

Northstar TPPL Blue 200Ah specification

The Northstar TPPL Blue battery has 2,050 life cycles at 50% depth of discharge (lead acid batteries are usually sized on the assumption of a 40-50% depth of discharge), a 12+ year life and a fast charge / discharge rate.

The batteries are manufactured by the multi-billion dollar US battery manufacturer, Northstar.

There are various sizes of the battery but we generally specify the 12V, 200Ah NSB-210FT-Blue+.

Key parameters for the batteries are as follows:

  • Partial state of charge cycling technology.
  • High cycling and fast recharge performance.
  • Operating temperature range: -40°C to 65°C.
  • Advanced 3 stage terminal design to ensure leak-free operation.

The specification of the 200Ah battery in particular is as follows:

Voltage  12 V
Capacity 200 Ah
Energy 2.4 kWh, usable capacity 1.2 kWh at 50% DOD
Dimensions (width x height x depth) 126 x 328 x 560 mm
Weight 69 kg
Lifecycles 2,050 at 50% DOD
Warranty 12 months