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OPzV and OPzS batteries

OPzV and OPzS batteries are renowned for their longevity and reliability in solar storage. When correctly sized (e.g. 20% daily discharge), they can achieve high cycle life (up to 8,000 cycles depending on configuration). OPzS batteries use tubular plates ( DIN compliant) to maximise cycle life, while OPzV batteries combine tubular plates and gel electrolyte for maintenance-free operation.

To compare technologies and estimate the actual cost of your storage, check out our tool. Need a more compact alternative? Discover our other battery models.

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AGM / GEL batteries
Lithium batteries (LiFePO4)

Choose in 30 seconds

  • Priority longevity: OPzV/OPzS if you are looking for very long-lasting storage (high cycle target).
  • Maintenance: OPzV = gel electrolyte, generally maintenance-free; OPzS = tubular plate lead with gas management (water refills spaced according to system).
  • Format: often in 2V cells to form a bank (24V/48V, etc.), or in pre-configured solutions depending on the model.
  • Sizing: aim for consistent use (e.g. 20% daily discharge) to maximise service life.
  • Compare/cost-effectiveness: use the battery comparison tool and cost-effectiveness calculator.

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FAQ - OPzV / OPzS Batteries

1. What are OPzV and OPzS batteries used for in solar systems? +
They are used for energy storage when long service life and reliability are the priority. With proper sizing (e.g., 20% daily depth of discharge), they can target high cycle life (up to 8000 cycles depending on configuration).
2. What is the difference between OPzS and OPzV? +
OPzS: tubular-plate lead-acid batteries (DIN compliant) designed for maximum cycling life, with gas recombination systems that can space out water refills depending on design. OPzV: sealed lead-acid with gel electrolyte, typically maintenance-free, also tubular plates and DIN compliant.
3. Why are 2V cells often mentioned (battery banks)? +
OPzV/OPzS are often available as 2V cells. By connecting them in series, you can build a bank (e.g., 24V, 48V…), which is practical for high capacities and long-life storage needs.
4. How do OPzV/OPzS compare to AGM/GEL or lithium? +
The best choice depends on your priority: cycle life, maintenance, size and budget. For an overview, see AGM / GEL, lithium (LiFePO4) and the battery comparison.
5. How can I estimate storage profitability? +
Compare technologies with the battery comparison and estimate the economic interest using the profitability calculator.