Generac GB2000

Last updated: October 20, 2026

Generac GB2000
2.6/5#30 of 30 in large power stations
2.6

For Generac owners who want a 2 kWh battery that can parallel with a second unit; most buyers get more capacity, faster charging and longer battery life for less from LiFePO4 rivals.

  • 2,106 WhCapacity
  • 1,600 WAC output
  • 43 lbWeight
  • Li-ion NMCBattery
  • $0.85Price / Wh
Check price at Toolnut$1,799

Price checked October 20, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • Over 2 kWh keeps a full-size fridge and internet running through a long outage
  • Runs 1,600W loads with 3,200W starting surge for motors and compressors
  • Built-in solar controller takes up to 468W without extra hardware
  • Two units can be linked with Generac’s paralleling kit for nearly double the output
Cons
  • 450W wall charging means a full recharge takes most of a day
  • Expensive per watt-hour for an NMC battery rated for only 1,000 cycles to 80%
  • Not designed for UPS use
  • 43 lb with no wheels
  • Hard to find at big-box stores; mostly sold through Generac dealers
  • No independent capacity test published yet

How it scores

The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Battery
Rated capacity2,106 Wh
ChemistryLi-ion NMC
Cycle life1,000 to 80% (0.5C charge, 1C discharge at 25 C)
ExpandableNo
Output
AC output1,600 W (3,200 W surge)
AC outlets3 total
120V 2-prong outlets (NEMA 1-15R)3
USB-C ports2 (up to 65 W each)
USB-A ports2
12 V car outletYes
UPS / pass-throughNo
Charging
AC charging450 W
Max solar input468 W
Solar input voltage10-28V, 30A max (shared DC/solar input)
Build
Weight43 lb (19.5 kg)
Dimensions16.8 x 10.4 x 15.1 in
Warranty3 years

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