Shorter life span of three to five years, requiring more frequent replacementĪn off-grid system or backup power during power outages.

Heavier and bulkier than other batteries.

Universal compatibility with most solar systems.

Reliable technology with decades of history.

More affordable than other battery types.

They contain environmentally harmful chemicals that must be disposed of properly. They also take longer to recharge and have shorter life spans, lasting between three and five years.

This makes them larger and heavier than other battery options. Lead-acid batteries have a low energy density, meaning they don’t hold much energy within their form. Both battery types work with solar power systems, but homeowners prefer sealed options for convenience and safety. Sealed lead-acid batteries don’t require any maintenance. Flooded lead-acid batteries are water-based and require regular maintenance, such as adding distilled water. Lead-acid batteries come in two varieties: flooded and sealed. However, lead-acid batteries can only safely discharge 50% of their capacity without affecting their life span. Manufacturers classify them as deep-cycle batteries, meaning they can handle regular draining and recharging.

These batteries are most common because they’re reliable and affordable. Lead-acid batteries have the longest history in the solar industry. Each battery type has different benefits and works for different scenarios. Solar panel systems use four main types of solar batteries: lead-acid, lithium-ion, nickel-cadmium, and flow.

Best home solar batteries