For larger panels, we recommend the Rupes HLR21 BigFoot iBrid with its 21mm orbit. This BAS kit includes two 18V 5Ah batteries and a dual charger. If you prefer a smaller orbit, compare the HLR15.
We would choose the 21mm orbit for covering broad, open panels efficiently. The brushless motor runs from the included 18V 5Ah batteries, with Rupes quoting up to 40 minutes at full power under its stated conditions. Actual working time varies with the job, so use the dual charger to recharge between batteries. Mains operation requires the optional Rupes adaptor, sold separately and not included in this BAS kit.
More in Dual Action Polishers and from Rupes.