Selling my Solutions From Science model ps 1800 generator. Battery/inverter back-up supply, internal charge controller, keeps battery from overcharging. 5 120V ac outlets, 12VDC Powerport, provides DC to automotive acc. Battery pack, 3 20 amp-hour batteries. Replacement Battery. DCM0018, LEACH DJW 12-22. Bought new in 2013, used 4 times, the unit was stored with batts that needed recharging, shelf life has expired. Paid $985 new, sac for $400. No longer need this now that I bought a tri-fuel generator. Call or text me to discuss.