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Affiliate disclosure: Energy4Solar is a reader-supported, independent research & comparison site — we don't sell or ship products. When you're ready to buy, you complete your purchase securely on the retailer's own site (such as BigBattery, Signature Solar, Solar Guys, or Amazon), and we may earn an affiliate commission at no extra cost to you. This never influences our independent testing, rankings, or editorial recommendations. Prices and availability are set by the retailer, accurate as of the date shown, and for illustration only.

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Battery Finder
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Shop premium energy storage

Browse 289 independently reviewed batteries, inverters, panels, and chargers.

Showing 12 of 289 products

BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS
80/100
K0237

BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS

x12 5.12kWh ETHOS + x2 EG4 FLEXBOSS18 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$22,620

DetailsBuy now
BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS
80/100
K0238

BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS

x9 5.12kWh ETHOS + x3 EG4 FLEXBOSS18 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$21,990

DetailsBuy now
BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS
80/100
K0239

BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS

x12 5.12kWh ETHOS + x3 EG4 FLEXBOSS18 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$26,415

DetailsBuy now
Energy4Solar

Independent reviews and premium solar batteries to help you power your home with clean, stored energy.

(818) 280-3091hello@energy4solar.com

Shop

  • All products
  • Home batteries
  • Brands

Learn

  • Buying guides
  • Battery calculator
  • Battery Finder
  • Blog
  • Categories

Best for

  • Home backup
  • RV & van life
  • Off-grid cabin
  • Marine
  • Commercial

Company

  • About us
  • Contact
  • Privacy

Affiliate disclosure: Energy4Solar is a reader-supported, independent research & comparison site — we don't sell or ship products. When you're ready to buy, you complete your purchase securely on the retailer's own site (such as BigBattery, Signature Solar, Solar Guys, or Amazon), and we may earn an affiliate commission at no extra cost to you. This never influences our independent testing, rankings, or editorial recommendations. Prices and availability are set by the retailer, accurate as of the date shown, and for illustration only.

© 2026 Energy4Solar. All rights reserved.

PrivacyTermsCookies
BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS
80/100
K0240

BigBattery ETHOS Battery + EG4 FLEXBOSS18 ESS

x18 5.12kWh ETHOS + x3 EG4 FLEXBOSS18 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$33,915

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0241

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

x2 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$6,460

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0242

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

x3 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$7,720

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0243

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

X4 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$9,195

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0244

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

X6 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$11,695

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0245

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

X8 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$14,590

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0246

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

X9 5.12kWh ETHOS + EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$15,850

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0247

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

x6 5.12kWh ETHOS + x2 EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$15,475

DetailsBuy now
BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS
80/100
K0248

BigBattery 48V ETHOS Battery + EG4 FlexBOSS21 ESS

x12 5.12kWh ETHOS + x2 EG4 FLEXBOSS21 ESS Included Components: 1) [FETHS-48051-G1]: 48V 5.12kWh ETHOS Stackable Battery Module

In stock6,000 cycles

$23,425

DetailsBuy now
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