How long does an OPzS battery last in an off-grid installation?

20-25 years, provided distilled water is topped up every 1-3 years; it remains the most cost-effective long-term option for a family home.

What's the difference between OPzS and OPzV?

OPzS is flooded tubular (needs water top-ups); OPzV is its sealed gel version, maintenance-free, designed for unventilated technical rooms or telecom cabinets.

Is LiFePO4 lithium worth it over lead-acid for renewables?

A 48 V LiFePO4 rack takes up half the space, tolerates 100% depth of discharge without penalty, lasts 10-15 years and integrates natively with Victron, SMA or Fronius inverters.

How do I know how many kWh I need for my renewable bank?

Multiply your daily kWh consumption by the days of autonomy without generation you want to cover, adjusted for the maximum depth of discharge of your chosen technology (50% lead, 80% lithium).

Do these batteries also work for wind or mini-hydro, not just solar?

Yes. Small wind and mini-hydro systems use the same 200-800 Ah AGM or OPzV banks at 24/48 V as an equivalent off-grid solar installation.

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Renewable Energy Batteries

The renewable-energy battery is the silent core of any distributed generation system that must run off-grid: solar PV off-grid, self-consumption with storage, small wind (rural, marine), mini-hydro and hybrid solar+wind+genset. Different from a car battery: here you need thousands of cycles at 50% DoD over 10-25 years.

Four technologies: OPzS (flooded tubular, 20-25 years), OPzV (sealed gel tubular, 18-22 years), deep cycle AGM (10-12 years, entry), LiFePO4 (4,000-6,000 cycles at 80% DoD).

There are 31 products.

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TROJAN

Solar battery Trojan SSIG 06 290 6V 265Ah

265Ah

262 × 181 × 292 mm

€549.40 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 95 12V 87Ah

12V

87Ah

277 × 168 × 235 mm

€400.40 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 255 12V 229Ah

12V

229Ah

380 × 176 × 373 mm

€915.50 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 230 12V 209Ah

12V

209Ah

380 × 176 × 373 mm

€821.20 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 170 12V 153Ah

12V

153Ah

354 × 181 × 272 mm

€609.60 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 145 12V 132Ah

12V

132Ah

354 × 171 × 256 mm

€542.50 VAT incl.

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TROJAN

Solar battery Trojan SSIG 12 120 12V 107Ah

12V

107Ah

326 × 168 × 247 mm

€438.30 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 490 6V 443Ah

443Ah

296 × 176 × 446 mm

€960.60 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 475 6V 428Ah

428Ah

296 × 176 × 446 mm

€872.40 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 405 6V 366Ah

366Ah

296 × 176 × 365 mm

€815.10 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 375 6V 336Ah

336Ah

296 × 176 × 365 mm

€735.30 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 255 6V 229Ah

229Ah

262 × 181 × 273 mm

€401.30 VAT incl.

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TROJAN

Solar battery Trojan SSIG 06 235 6V 214Ah

214Ah

262 × 181 × 273 mm

€362.90 VAT incl.

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TROJAN

Solar battery Trojan SPRE 12 225 12V 204Ah

12V

204Ah

380 × 176 × 374 mm

€941.30 VAT incl.

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TROJAN

Solar battery Trojan SPRE 06 415 6V 377Ah

377Ah

296 × 176 × 446 mm

€921.20 VAT incl.

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TROJAN

Solar battery Trojan SPRE 06 255 6V 229Ah

229Ah

262 × 181 × 298 mm

€491.95 VAT incl.

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TROJAN

Solar battery Trojan SPRE 02 1255 2V 1130Ah

1130Ah

296 × 176 × 446 mm

€932.70 VAT incl.

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TROJAN

Solar battery Trojan SIND 06 920 6V 708Ah

708Ah

567 × 262 × 610 mm

€2,140.60 VAT incl.

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Showing 1-18 of 31 item(s)

Sizing your renewable bank

Start with daily kWh and days of autonomy without generation. A family off-grid home: 8-15 kWh/day; with 3 days autonomy at 50% DoD lead, that's 48-90 kWh nominal — bank voltage matched to the inverter (24 V small, 48 V whole-house). LiFePO4 drops to 24-45 usable kWh at 80% DoD.

Table by renewable application

Application	Typical capacity	Voltage	Technology
Cabin / shelter off-grid	200-400 Ah	12 / 24 V	Deep cycle AGM / OPzV
Family off-grid home	800-1,500 Ah	48 V	OPzS / OPzV / LiFePO4
Self-consumption + storage	5-15 kWh usable	48 V	LiFePO4 (wall rack)
Small wind / mini-hydro	200-800 Ah	24 / 48 V	AGM / OPzV
Telecom / remote monitoring	100-400 Ah	48 V	OPzV long-cycle gel

OPzS vs OPzV vs AGM vs Lithium

OPzS remains the most cost-effective long-term option for family off-grid — 20-25 year life with distilled water top-up every 1-3 years. OPzV gel is the sealed version (zero maintenance) — for unventilated technical rooms or telecom cabinets. Deep cycle AGM is the affordable entry. LiFePO4 48 V rack is the new benchmark: half the footprint, 100% DoD without penalty, 10-15 year life, native integration with Victron, SMA, Fronius inverters.

Leading brands

How to compare before choosing your renewable bank

Use the comparator to see capacity (Ah/kWh), voltage, cycle life and dimensions of each model at a glance, and pick the combination that best fits your inverter and target autonomy.

Frequently asked questions about renewable-energy batteries

How long does an OPzS battery last in an off-grid installation?: 20-25 years, provided distilled water is topped up every 1-3 years; it remains the most cost-effective long-term option for a family home.
What's the difference between OPzS and OPzV?: OPzS is flooded tubular (needs water top-ups); OPzV is its sealed gel version, maintenance-free, designed for unventilated technical rooms or telecom cabinets.
Is LiFePO4 lithium worth it over lead-acid for renewables?: A 48 V LiFePO4 rack takes up half the space, tolerates 100% depth of discharge without penalty, lasts 10-15 years and integrates natively with Victron, SMA or Fronius inverters.
How do I know how many kWh I need for my renewable bank?: Multiply your daily kWh consumption by the days of autonomy without generation you want to cover, adjusted for the maximum depth of discharge of your chosen technology (50% lead, 80% lithium).
Do these batteries also work for wind or mini-hydro, not just solar?: Yes. Small wind and mini-hydro systems use the same 200-800 Ah AGM or OPzV banks at 24/48 V as an equivalent off-grid solar installation.

Catalogue curated by our technical team. 12,137 Trustpilot reviews · 4.5/5. 24-48 h delivery in mainland Spain and Portugal (orders before 6:00 pm); 14-day returns with free collection on the Iberian mainland.

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Renewable Energy Batteries

Sizing your renewable bank

Table by renewable application

OPzS vs OPzV vs AGM vs Lithium

Leading brands

How to compare before choosing your renewable bank

Frequently asked questions about renewable-energy batteries

Best sellers in Renewable Energy Batteries