SizingBeginner
How to Size a Home Battery for Solar
Calculate daily kWh, backup days, and inverter compatibility before you buy a LiFePO4 home battery.
8 min read
Read guide →Learn
Guides, manuals & more
Independent buying guides, manufacturer PDFs, and tools to size, compare, and install home batteries.
Buying guides & how-tos
Size, chemistry, install, warranty, and bill savings — written for homeowners.
ChemistryBeginner
LiFePO4 vs NMC: Which Chemistry for Home Storage?
Compare cycle life, safety, cost, and energy density for residential solar batteries.
6 min read
Read guide →Buying guideIntermediate
Best Home Batteries in 2026: How We Rank Them
Our Energy Score methodology — efficiency, warranty, compatibility, and value — explained.
7 min read
Read guide →Buying guideIntermediate
EG4 WallMount Buyer’s Guide
Indoor vs All-Weather, 280Ah vs 314Ah, and which hybrid inverter pairs cleanly with EG4 WallMount packs.
9 min read
Read guide →InstallIntermediate
Home Battery Install Basics (What to Expect)
Permits, placement, transfer equipment, and the difference between a clean DIY and a code-compliant install.
8 min read
Read guide →Buying guideBeginner
Battery Warranty: What Actually Matters
Cycle throughput, calendar years, and the fine print that decides whether a 10-year claim pays out.
6 min read
Read guide →SavingsBeginner
Time-of-Use Rates: How Batteries Save Money
Charge off-peak, discharge on-peak — when a home battery pays for itself beyond backup alone.
7 min read
Read guide →Manuals & quick starts
Official manufacturer PDFs (EG4 Electronics). Always match the revision to your serial and firmware.
- ManualEG4
EG4 WallMount All-Weather — User Manual
Full install, paralleling, conduit box, and BMS setup for outdoor WallMount packs.
- ManualEG4
EG4 18kPV Hybrid Inverter — User Manual
Wiring, grid/gen ports, battery protocols, and commissioning for the 18kPV.
- ManualEG4
EG4 FlexBOSS18 Hybrid Inverter — User Manual
Specs, mounting, battery terminals, and GridBOSS pairing notes.
- ManualEG4
EG4 FlexBOSS21 Hybrid Inverter — User Manual
16 kW hybrid install guide — PV MPPTs, battery breakers, and clearances.
- Quick startEG4
EG4 WallMount All-Weather — Quick Start
Fast mounting overview with 18kPV / FlexBOSS bracket notes.
EG4 · Reference
EG4 Electronics — Support & Downloads
Latest firmware notes, warranty forms, and document library from the manufacturer.
Visit site
BigBattery · Reference
BigBattery — Product catalog
Live pricing and kits we affiliate to — open a product, then check its docs tab on the retailer page.
Visit site
7 resources linked · PDFs open on the manufacturer site
Tools
Use these before you buy — size the bank, shortlist models, then compare.
Battery size calculator
Estimate kWh and pack count from daily use and backup days.
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Battery Finder
Answer a few questions and get ranked product matches.
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Compare side by side
Line up up to four models on score, $/kWh, cycles, and price.
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Shop home batteries
Browse in-stock LiFePO4 storage with live partner pricing.
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FAQ
Quick answers before you dig into a full guide.
- Do I need a permit for a home battery?
- Most jurisdictions treat whole-home ESS as electrical work. Expect a permit, an inspection, and UL-listed gear. Always check your AHJ before buying.
- Can I install this myself?
- DIY is common for experienced electricians, but high-voltage DC, transfer equipment, and code compliance are easy to get wrong. If you are unsure, hire a licensed installer.
- Where do manuals come from?
- We link manufacturer PDFs (mainly EG4 Electronics) so you get the current install and safety documentation. Always confirm the revision matches your serial/firmware.
- How is Energy4Solar different from the retailer?
- We help you size and compare. Purchases complete on partner sites like BigBattery — we may earn a commission at no extra cost to you.