Lanyu LANYU Gel Lead-Acid Battery Full Series Explained: How to Build 48V/96V Off-Grid Systems with 2V Cells and 12V Combinations?

I. Lanyu LANYU Gel Lead-Acid On-Sale Models

The 2V cells cover 100Ah to 3000Ah, suitable for large off-grid/backup sites that require capacity stacking on demand; the 12V combinations are suitable for small and medium off-grid systems that can be directly connected in series into a bank.

II. Trade-offs Among Three Chemistries in Off-Grid Scenarios

III. Series and Parallel: How to Build 48V and 96V Systems

Lead-acid batteries use "series to increase voltage, parallel to increase capacity" to form a system. Basic formulas:

• System voltage = Single battery voltage × Number of batteries in series

• Total capacity (Ah) = Single battery capacity (Ah) × Number of parallel strings

• Total energy (kWh) = System voltage × Total capacity (Ah) ÷ 1000

Two ways to build a 48V system:

- Using 12V batteries: 4 in series (4 × 12V = 48V)

- Using 2V batteries: 24 in series (24 × 2V = 48V)

Two ways to build a 96V system:

- Using 12V batteries: 8 in series (8 × 12V = 96V)

- Using 2V batteries: 48 in series (48 × 2V = 96V)

When larger capacity is needed, treat one such series string as a group and connect multiple groups in parallel. For example, a 48V system using 12V200Ah (id=13): 4 in series per group = 48V200Ah ≈ 9.6kWh; two groups in parallel = 48V400Ah ≈ 19.2kWh.

IV. Decision Table: When You Should Still Choose Gel Lead-Acid

V. Calculation Example: A 48V Off-Grid Base Station Battery Bank

A monitoring site without grid power consumes 4 kWh per day and requires 3 days of backup. Taking usable DoD of lead-acid as 0.5 (shallow cycling is recommended for gel to extend life):

• Required usable energy = 4 × 3 ÷ 0.5 = 24 kWh

• Select 12V200Ah (id=13) × 4 in series = 48V200Ah ≈ 9.6 kWh (one group)

• Need 24 ÷ 9.6 ≈ 2.5 groups → round up to 3 groups in parallel = 48V600Ah ≈ 28.8 kWh

This configuration meets 3-day backup with margin. Note that lead-acid DoD should not be too deep, so 0.5 is used.

VI. Frequently Asked Questions

Q1: What is the difference between Lanyu gel lead-acid and ordinary lead-acid?

A: Gel batteries use gelled electrolyte. Compared with flooded types, they are more resistant to overcharging, less prone to leakage, and can be placed in any orientation, making them more suitable for long-term static off-grid scenarios.

Q2: How to choose between 2V cells and 12V combinations?

A: For sites requiring very large capacity and long-term maintainable expansion, choose 2V cells (100–3000Ah); for small and medium systems where simplicity is preferred, choose 12V combinations that can be directly connected in series into 48V/96V.

Q3: How long can gel batteries last?

A: Lifespan depends on depth of discharge and temperature. With shallow cycling (DoD within 50%) and normal ambient temperature, they can last for several years; deep cycling will significantly shorten life, which is why Torchn LFP/sodium batteries are better in high-frequency scenarios.

Q4: Do gel batteries require maintenance?

A: Lanyu LANYU batteries are valve-regulated sealed gel batteries, normally maintenance-free with no need to add water; only periodic checks of terminal voltage and connection tightness are required.

Q5: Can they be used with Torchn inverters?

A: Yes. Lanyu gel batteries and Torchn off-grid inverters (US standard id=29, EU standard id=35) are both from Yangzhou Dongtai Solar Energy's product line, and their voltage standards match.

Related products: Lanyu 12V24Ah gel battery (id=1) | 12V200Ah (id=13) | 2V3000Ah (id=58)

Manufacturer: Yangzhou Dongtai Solar Energy Co., Ltd. (Lanyu LANYU / Torchn brands)