BigBattery

03/30/2026

Get an in-depth look at the NEXUS 48V 15kWh LiFePO₄ battery system as BigBattery’s CTO, Marshall Neipert, walks through its design, capabilities, and real-world applications.

In this breakdown, Marshall covers everything from system architecture and performance to the key features that make NEXUS a powerful solution for off-grid, backup, and scalable energy storage systems.

Whether you're building a complete energy setup or upgrading your current system, this video will help you understand why NEXUS is engineered for reliability, expandability, and long-term performance.

Shop NEXUS: https://bigbattery.com/products/48v-15-nexus-lifepo4-battery/ -grid

01/07/2026

Big news: BigBattery just launched our first-ever inverter line — APEX is here. ⚡️

✅ Now available for pre-order
APEX 6.5K: $1,490
APEX 10K: $1,990

Built for real off-grid energy independence with clean pure sine-wave power and split-phase 120/240V output. Pre-order inverter-only or pair with our new 48V NEXUS batteries for a complete setup.

Shop now + lock in your pre-order: https://bigbattery.com/products/apex-6-5k-off-grid-inverter/apex-6-5k-off-grid-inverter

12/16/2025

Average Joe just put the 48V NEXUS to the test 🔋⚡️

If you’ve been wondering what the 48V NEXUS is really like in the real world—setup, performance, and what it’s best for—this review covers it.

Watch the full video and see why NEXUS is built for serious home/off-grid backup with clean, reliable LiFePO₄ power, backed by our 12-Year U.S.-based warranty.

Shop NEXUS + EG4 6000XP: https://bigbattery.com/products/nexus-6kw-power/

Average Joe's Video:
https://www.youtube.com/watch?v=trKXzj79YI4

Full Send Review of the 15kWh NEXUS Off-Grid Battery from BigBattery.comIf you are Interested in Saving 5% and want to Support my Channel by purchasing throu...

12/13/2025

⚡️EAGLE 2 in 48V has upgraded 15k+ carts across America... and by popular demand, we just added 36V to the family!🦅

Do you have a 36V golf or utility cart still running lead-acid? This is the easiest upgrade you can make, no more buying batteries for the next 12+ years!🔋

The 36V EAGLE 2 LiFePO₄ Battery Kit is built with Tier-1 LiFePO₄ cells a true GC2/T-105 drop-in replacement that fits most legacy 36V trays and delivers:

✅ Longer range
✅ Faster charging
✅ Maintenance-free power

EAGLE 2 brings modern lithium performance to older carts, backed by our 12 Year USA Battery Warranty.

Shop EAGLE 2: https://bigbattery.com/golf-carts/?sl=metatraffic

12/09/2025

The 48V NEXUS off-grid solar battery is built to keep your cabin, homestead, or backup system running strong with serious LiFePO4 capacity, scalability, and dependable performance when the grid can’t be trusted.

If you’ve been waiting to build out your off-grid system or upgrade your old bank, this is the moment. Use code HOLIDAY2025 for 8% Off + Free Shipping on all NEXUS orders! (Sale ends 1/5/2026)🎄

Head to https://bigbattery.com/products/48v-15-nexus-lifepo4-battery/ -grid/?sl=xproductads to add Nexus to your cart and apply the HOLIDAY2025 code!🔋

12/02/2025

⚡ CYBER WEEK IS LIVE AT BIGBATTERY ⚡

From now through December 8th, 2025, you can power up your system and save big with code CYBERWEEK2025

✅ 8% OFF all orders over $2,000
✅ $200 MAX flat rate shipping on every order

Whether you’re building a home backup system, going off-grid, or upgrading your RV, golf cart, or industrial equipment, this is the week to get long-lasting lithium power at a serious discount.

👉 Load up your cart at www.BigBattery.com, hit that $2,000+ mark, and your 8% off + max $200 shipping will apply at checkout or cart with code CYBERWEEK2025 🔋

Don’t wait, Cyber Week deals end December 8th, 2025. 🔋🔥

11/25/2025

Meet the EG4 WallMount 314Ah Indoor Battery – your new whole-home (or small business) powerhouse. Whether you’re fighting rising energy costs or want peace of mind during outages, this compact unit delivers 16.1 kWh of storage and 200A continuous output for serious backup you can count on.

✅ Whole-Home Confidence – Keep lights, appliances, and critical loads running with up to 12.8 kW peak power.

✅ Cross-Compatible – Seamlessly pairs with other EG4 batteries for easy expansion and larger systems.

✅ Next-Gen Safety & Control – Third-generation BMS offers smarter monitoring, better balancing, and faster protection.

✅ Cold-Weather Ready – Built-in self-heating maintains performance and battery health in low temps.

✅ Flexible Install – Hybrid wall or floor mount indoor design with a durable, space-saving enclosure.

✅ Effortless Setup – Auto-ID technology instantly recognizes and syncs new batteries during installation.

SHOP NOW: https://bigbattery.com/products/eg4-wallmount-indoor-battery-48v-314ah-16-1kwh-indoor-heated-ul1973-ul9540a-10-year-warranty/

11/23/2025

⚡ BLACK FRIDAY IS LIVE! Use Code: BLACKFRIDAY2025 ⚡

BigBattery’s biggest sale of the year starts NOW! Get 10% OFF sitewide plus FREE SHIPPING on all battery and inverter orders when you use code BlackFriday2025 at checkout on orders over $1,000.

Hurry – this Black Friday super sale ends December 2nd, 2025 at 2:00 AM EST. Upgrade your home backup, off-grid, RV, marine, industrial equipment or golf cart system and lock in serious savings before the deal powers down. 🔋🔥

Shop Everything: https://www.BigBattery.com/

11/05/2025

Now Available: MeterHome on BigBattery.com 🚨
Meet the USA built MeterHome — an all-in-one home energy storage system for whole-home backup, rate-hike protection, and everyday reliability. It integrates solar, grid, and generator sources with safe, stackable LiFePO₄ batteries, real-time weather outage protection, and 24/7 US-based monitoring.

Offering 7.15kWh per battery module alongside a custom 10kW Hybrid Inverter, your energy can grow with your needs. Built in the USA, designed and tested for durability, and backed by a 10-year warranty.

Ready to power your home smarter?

👉 Shop MeterHome today at BigBattery.com/ul-certified-grid-tied-systems/

10/16/2025

🚨Introducing our brand new 48V NEXUS: 15kWh & 300Ah of next-generation Off-Grid Battery power. The lowest price-per-kWh for Off-Grid LiFePO4 with a United States based customer support — just $199/kWh! 🔋

With expandable capacity up to 225kWh per Inverter, an advanced BMS, internal self heating, and a 12-Year US battery warranty, the NEXUS delivers true energy independence. No grid. No limits. Just power, freedom, and peace of mind wherever you live.

Shop NEXUS: https://www.bigbattery.com/nexus

07/29/2025

BigBattery is excited to announce FREE SHIPPING on ALL Batteries and Inverters across the U.S. at www.BigBattery.com 🎉

Whether you’re upgrading your golf cart with our 48V Eagle 2, taking your RV off-grid with the Husky 2, or investing in a full home backup system like the ETHOS, your order now ships absolutely free.

This means no hidden fees, no surprises — just industry-leading LiFePO₄ batteries at unbeatable prices, delivered straight to your door.