How Big Is the Battery for a 36V Inverter A Complete Guide

Choosing the right battery size for a 36V inverter is critical for optimizing performance in solar energy systems, industrial setups, and residential applications. This guide breaks down battery capacity calculations, real-world examples, and industry trends to help you make informed decisions.

Understanding Battery Capacity for 36V Inverters

A 36V inverter converts DC power from batteries into AC power for devices. The battery size depends on two factors:

• Power Requirements: Total wattage of connected devices.
• Runtime Needs: How long the system must operate without recharging.

For example, a 1,000W load running for 3 hours requires a battery capacity of at least 83.3 Ah (1,000W ÷ 36V × 3h).

Common Applications and Battery Sizes

Here's a quick look at typical setups:

Application	Load (Watts)	Runtime (Hours)	Battery Capacity (Ah)
Residential Solar	500–1,500	4–8	55–167
Industrial Backup	2,000–5,000	2–4	111–556
Off-Grid Cabin	300–800	10–24	83–533

Key Factors Influencing Battery Size

1. Depth of Discharge (DoD)

Most lithium batteries allow an 80–90% DoD. For a 100Ah battery, only 80–90Ah is usable. Lead-acid batteries, however, limit DoD to 50%.

Pro Tip: Always factor in DoD to avoid over-draining your battery!

2. Efficiency Losses

Inverters typically lose 5–15% energy during conversion. Add a 10% buffer to your calculated capacity. For a 100Ah requirement, choose a 110Ah battery.

Case Study: Solar-Powered Farm in California

A farming project required a 36V inverter to power irrigation pumps (1,200W) for 6 hours daily. Using lithium batteries with 90% DoD:

• Total energy needed: 1,200W × 6h = 7,200Wh
• Battery capacity: 7,200Wh ÷ 36V ÷ 0.9 = 222Ah

The team installed two 120Ah lithium batteries in parallel, achieving reliable performance even during cloudy days.

Industry Trends and Innovations

The shift toward lithium-ion batteries is accelerating due to:

• Longer lifespan (10+ years vs. 3–5 years for lead-acid).
• Faster charging and compact designs.

According to BloombergNEF, lithium battery prices have dropped 89% since 2010, making them cost-effective for 36V systems.

Why Choose EK SOLAR for Your 36V Inverter Battery?

With over a decade of expertise in energy storage, EK SOLAR provides tailored solutions for:

• Solar energy integration
• Industrial backup power
• Off-grid residential systems

Contact our team for a customized quote or technical support.

FAQ: 36V Inverter Battery Sizes

• Q: Can I use car batteries for a 36V inverter?A: Not recommended—car batteries aren't designed for deep cycling.
• Q: How long does a 100Ah battery last?A: For a 500W load: (100Ah × 36V × 0.8 DoD) ÷ 500W ≈ 5.7 hours.

Need a reliable 36V battery setup? WhatsApp us at +86 138 1658 3346 for instant assistance!

In summary, selecting the right battery size for your 36V inverter involves calculating energy needs, accounting for efficiency losses, and choosing modern lithium solutions for longevity. Pair these insights with professional support from trusted suppliers like EK SOLAR to ensure seamless power delivery.