AO Smith Signature 100 50-Gallon Electric Water Heater

The AO Smith Signature 100 50-Gallon Electric Water Heater (EJC-50) is the volume electric pick for 2–4 person households shopping at Lowe's. 6-year warranty, 0.92 UEF, 4500W dual-element, 62 GPH first-hour delivery. Same residential ProLine chassis under the Signature 100 Lowe's badge.

Headline specifications

• Capacity: 50 gallons
• Fuel: Electric, 240V
• Element: 4500W upper + 4500W lower (non-simultaneous)
• First Hour Delivery: 62 GPH
• Recovery: 21 GPH at 90°F rise
• UEF: 0.92
• Warranty: 6-year tank and parts
• Anode: magnesium
• Dimensions: 56" H × 20" diameter

Who this model is for

The right buyer profile is a 2–4 person household on electric service, replacing a 50-gallon tank, shopping Lowe's. Single or double bathroom. Suburban condo, all-electric ranch, or rural home without natural gas service.

For 1–2 person households, the 40-gallon saves $50–$80 and fits tighter installs. For 4+ person households or heavy laundry/shower loads, step up to 80-gallon or pivot to the Voltex Hybrid 50.

Where it beats the alternatives

Vs Rheem Performance Platinum 50 Electric ($699): AO Smith ~$100 less. Rheem ships 12-year warranty + EcoNet WiFi. AO Smith ships 6-year + no WiFi. For 5–6 year ownership horizons, AO Smith is the value pick.

Vs Rheem Performance 50 Electric ($549): close price and same warranty (6 years). Choose AO Smith if your retailer is Lowe's.

Vs Voltex Hybrid 50 HP ($1,649): Voltex pays back in operating cost within 4 years if the basement supports it. For renters or short-term owners, the Signature 100 50 is correct.

Vs Bradford White 50 Electric ($799): Bradford White ships through plumber channel — better build quality, higher resale, but no big-box availability. Choose AO Smith if you self-source and DIY.

Where it falls short

6-year warranty trails Rheem Platinum 12-year at the same price tier. If you're keeping the unit 8+ years, Rheem's warranty math is better.

0.92 UEF resistance electric is the standard, but operating cost runs $500–$700 annually for 2–4 person households at $0.14/kWh — vs $180–$240 for a heat pump.

4500W elements heat sequentially (upper-then-lower). Households with concurrent shower-and-dishwasher demand may exceed simultaneous capacity even at 50 gallons.

Install considerations

56" height fits standard utility closet. 30-amp 240V dedicated circuit required. Replacing existing 50-gallon electric: same footprint, reuse circuit.

Install cost: $350–$700 for like-for-like swap.

Maintenance

• Annual flush
• Anode check year 3, replace year 5
• T&P valve test annually
• Element inspection at year 5

Bottom line

The AO Smith Signature 100 50 Electric is the standard volume Lowe's pick for 2–4 person all-electric households. 6-year warranty, 0.92 UEF, 62 GPH FHD. $100 cheaper than Rheem Platinum but with 6 vs 12 year warranty. If your basement supports a heat pump, the Voltex recoups its premium in 3–4 years.