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Batteries for Solar Applications

Solar PV batteries: off-grid, hybrid backup and self-consumption with storage. A good 12V solar battery or 24/48 V bank accepts slow daytime panel charge, discharges slowly at night and tolerates thousands of cycles at 50% DoD without capacity loss.

Three dominant technologies: deep cycle AGM (entry-level, the most common solar panel battery for small installations), OPzS / OPzV (stationary, 20-25 years) and LiFePO4 lithium (premium, 4,000-6,000 cycles at 80% DoD).

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OPTIMA

Caravan battery Optima YTS-5.5 12V 75Ah 975A AGM

12V

75Ah

975A

325 × 165 × 238 mm

5,00(1)

€261.10 VAT incl.

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VARTA

Marine battery Varta LA95 12V 85Ah AGM

12V

850

AGM

353 × 175 × 190 mm

€182.40 VAT incl.

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OPTIMA

Marine battery Optima BTDC-5.5 12V 75Ah 975A AGM

12V

75Ah

975A

325 × 165 × 238 mm

5,00(2)

€263.70 VAT incl.

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VARTA

Marine battery Varta LA80 12V 77Ah AGM

12V

80Ah

800A

AGM

315 × 175 × 190 mm

€154.80 VAT incl.

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VARTA

Marine battery Varta LFD140 12V 119Ah

12V

140

800

513 × 189 × 223 mm

€181.40 VAT incl.

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OPTIMA

Marine battery Optima BTDC-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€216.90 VAT incl.

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OPTIMA

Caravan battery Optima YTS-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€213.80 VAT incl.

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VARTA

Marine battery Varta LA105 12V 95Ah AGM

12V

105

950

AGM

394 × 175 × 190 mm

€243.90 VAT incl.

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VARTA

Marine battery Varta LA70 12V 60Ah AGM

12V

760

AGM

278 × 175 × 190 mm

€140.80 VAT incl.

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OPTIMA

Caravan battery Optima YTU-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€210.80 VAT incl.

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OPTIMA

Auxiliary battery Optima YTR-2.7 12V 38Ah 460A AGM

12V

38Ah

460A

237 × 129 × 227 mm

2,00(1)

€214.50 VAT incl.

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FULLRIVER

Marine battery Fullriver DC115-12A 12V 115Ah AGM

12V

115Ah

760

AGM

328 × 172 × 241 mm

€380.30 VAT incl.

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OPTIMA

Marine battery Optima BTSLI-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

5,00(1)

€181.50 VAT incl.

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FULLRIVER

Marine battery Fullriver DC35-12A 12V 35Ah AGM

12V

35Ah

190

AGM

196 × 131 × 167 mm

€140.40 VAT incl.

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VARTA

Marine battery Varta LFD90 12V 77Ah

12V

800

353 × 175 × 190 mm

€215.30 VAT incl.

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VARTA

Marine battery Varta LFS105N 12V 85Ah

12V

105

800

330 × 172 × 240 mm

€215.90 VAT incl.

Buy

OPTIMA

Car battery Optima YTS-2.1 6V 55Ah 765A AGM

55Ah

765A

255 × 90 × 206 mm

€161.40 VAT incl.

Buy

OPTIMA

Marine battery Optima BTDC-5.0 12V 66Ah 765A AGM

12V

66Ah

845A

309 × 172 × 221 mm

€225.70 VAT incl.

Buy

Showing 1-18 of 181 item(s)

Frequently asked questions

How long does an OPzS or OPzV solar battery last?

Stationary OPzS/OPzV batteries reach 20-25 years of service life in typical off-grid use, well beyond what a deep cycle AGM offers, which is cheaper up front but shorter-lived.

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

LiFePO4 handles 4,000-6,000 cycles at 80% depth of discharge, far beyond typical lead-acid figures at the same depth. It's the premium choice when space or weight are limiting factors.

How do I calculate how many batteries I need for my solar panels?

Start from your daily kWh consumption and the days of autonomy without sun you want to cover; combined with your inverter voltage (12, 24 or 48 V), that gives you the bank's nominal capacity, as shown in the indicative table on this page.

Can I use a car battery for a solar system?

It's not recommended: a car battery (SLI) is built for cranking spikes, not the deep, slow, sustained cycling of a solar installation.

Sizing your solar bank

Start with your daily consumption in kWh. An off-grid home averages 5-15 kWh/day. For three days of autonomy with 50% lead DoD, you need 30-90 kWh nominal — sized to inverter voltage (12, 24 or 48 V). Lithium drops it to 15-45 usable kWh at 80% DoD.

Indicative table

Application	Typical capacity	Voltage	Technology
Small off-grid (cabin, shelter)	200-400 Ah	12 / 24 V	Deep cycle AGM
Family off-grid home	800-1,500 Ah	48 V	OPzS / GEL deep cycle
Self-consumption with storage	5-15 kWh	48 V	LiFePO4
Remote / telecom station	500-2,000 Ah	48 V	OPzV

Leading solar brands

Fullriver DC AGM — entry and mid power.
Trojan Solar Signature 1500 — 1,500 cycles at 50% DoD.
Ritar RT — budget solar range.
MK Gel — sealed deep cycle.

How to compare before buying your solar battery

Use the comparator to check capacity (Ah), voltage, technology and dimensions of each solar battery at a glance, and pick the one that best fits your bank and inverter.

Catalogue curated by our technical team. 12,269 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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Batteries for Solar Applications

Frequently asked questions

Sizing your solar bank

Indicative table

Leading solar brands

How to compare before buying your solar battery

Best sellers in Batteries for Solar Applications