Big Battery Coupons & Promo Codes with 10% OFF (20 Working Codes) — September 2026

Big Battery specializes in deep cycle lithium and LiFePO4 batteries for solar, RV, marine, and off-grid systems. The company offers price matching on verified competitor prices and includes free shipping on qualifying orders.

Deep Cycle Lithium Batteries for Clean Energy

Big Battery specializes in deep cycle lithium and LiFePO4 batteries designed for renewable energy systems. Their product range serves homeowners, RV enthusiasts, marine operators, and off-grid communities looking for reliable battery storage. With over 165,000 products shipped and 120,000 residential solar units deployed, the company has established itself as a trusted source for energy solutions. Their batteries feature modular, hot-swappable components with no proprietary parts, which aligns with their philosophy of enabling customers to maintain and repair their systems independently. Big Battery positions itself as the leading environmental battery manufacturer in the United States and is the only carbon-neutral battery manufacturer in their market segment, appealing to environmentally conscious consumers. The company was founded on the mission to make clean energy accessible by addressing what they identify as the primary barrier to renewable energy adoption: high battery storage costs. Their founder and CEO, Eric Lundgren, leads this focus on sustainable innovation and industry-leading pricing.

Product Range and Pricing Strategy

Big Battery offers a comprehensive selection of lithium battery systems, from individual battery units to complete kits that integrate batteries, inverters, and related equipment for solar installations, RV setups, marine applications, and off-grid systems. The company provides free shipping on qualifying orders, which can meaningfully reduce the total cost of purchase for larger battery systems. While specific pricing details are not publicly stated on their main promotional channels, Big Battery's value proposition centers on competitive, industry-leading prices supported by their price-match guarantee—they'll match any verified competitor's price. This commitment reflects their stated mission to reduce the cost barrier to clean energy adoption. Given that the company has repurposed 214 MWh of batteries through their programs, they demonstrate both scale and operational maturity in the battery storage market. Products range from entry-level battery options suitable for small solar installations or RV backup power, to comprehensive energy solutions designed for residential solar arrays and off-grid properties.

Coupon Codes and Savings Available

Big Battery currently offers several coupon codes with discounts ranging from 5% to 10%. Most codes (nine of them) offer 5% off sitewide or on specific product categories like battery kits, power systems, and batteries with inverters. One code provides 10% off battery inverter kits specifically, making it the highest-value discount available. A second tier code offers 7% off batteries and equipment. Given that Big Battery promotes free shipping on qualifying orders and offers a price-match guarantee on verified competitor prices, coupon codes provide an additional layer of savings that compounds these already competitive offers. For customers planning significant purchases—such as complete solar battery backup systems or RV lithium setups—even a 5% to 10% discount translates to meaningful savings on systems that typically cost hundreds to thousands of dollars. The breadth of available codes means customers can usually find an offer that applies whether they're buying individual batteries, full kits, or mixed equipment bundles, making a code search worthwhile before checkout.

What stands out

Pros

• Price match guarantee on verified competitor prices
• Modular, hot-swappable components with no proprietary parts
• Carbon-neutral manufacturer with 12+ years in business

Cons

• Free shipping limited to qualifying orders only
• Specific product pricing not detailed in marketing materials

Frequently asked questions

Does Big Battery offer price matching?

Yes, Big Battery guarantees price matching on any verified competitor's price. This commitment is part of their mission to make clean energy more accessible by offering industry-leading pricing on lithium and LiFePO4 batteries.

What types of batteries does Big Battery sell?

Big Battery specializes in deep cycle lithium and LiFePO4 batteries for solar, RV, marine, golf cart, and off-grid systems. Their products feature modular, hot-swappable components with no proprietary parts, supporting the right to repair.

How many coupon codes are currently available?

Big Battery currently lists several coupon codes offering discounts from 5% to 10% off. Most codes provide 5% sitewide savings, one offers 10% specifically on battery inverter kits, and another gives 7% off batteries and equipment.