A system comprising: a load or an inverter; a plurality of power generators, wherein each power generator (301a-n, 601an) comprises a power device (602a-n) comprising a DC/DC converter, wherein the power device is configured to harvest power of the power generator using power point tracking; and a combiner comprising: a plurality of input terminals (401a-401n, 501a-501h) configured to receive harvested power from the plurality of power generators; a plurality of switches (4Sa-4Sn, 5Sa-5Sd) coupled to the plurality of input terminals; a plurality of output terminals (403a-403n, 503a-503b) configured to output the harvested power to the load or the inverter at an output voltage determined by the load or the inverter, wherein the load or the inverter is coupled to the output terminals of the combiner; and a controller (402, 502) configured (i) to set an operating point for each one of the power generators coupled to the input terminals of the combiner and (ii) to control the plurality of switches to set a coupling configuration between the plurality of input terminals (401a-n, 501a-501h) by matching voltages and/or currents between the input terminals of the combiner, wherein matching voltages and/or currents includes connecting certain input terminals in series or further input terminals in parallel. a load or an inverter; a plurality of power generators, wherein each power generator (301a-n, 601an) comprises a power device (602a-n) comprising a DC/DC converter, wherein the power device is configured to harvest power of the power generator using power point tracking; and a combiner comprising: a plurality of input terminals (401a-401n, 501a-501h) configured to receive harvested power from the plurality of power generators; a plurality of switches (4Sa-4Sn, 5Sa-5Sd) coupled to the plurality of input terminals; a plurality of output terminals (403a-403n, 503a-503b) configured to output the harvested power to the load or the inverter at an output voltage determined by the load or the inverter, wherein the load or the inverter is coupled to the output terminals of the combiner; and a controller (402, 502) configured (i) to set an operating point for each one of the power generators coupled to the input terminals of the combiner and (ii) to control the plurality of switches to set a coupling configuration between the plurality of input terminals (401a-n, 501a-501h) by matching voltages and/or currents between the input terminals of the combiner, wherein matching voltages and/or currents includes connecting certain input terminals in series or further input terminals in parallel. a plurality of input terminals (401a-401n, 501a-501h) configured to receive harvested power from the plurality of power generators; a plurality of switches (4Sa-4Sn, 5Sa-5Sd) coupled to the plurality of input terminals; a plurality of output terminals (403a-403n, 503a-503b) configured to output the harvested power to the load or the inverter at an output voltage determined by the load or the inverter, wherein the load or the inverter is coupled to the output terminals of the combiner; and a controller (402, 502) configured (i) to set an operating point for each one of the power generators coupled to the input terminals of the combiner and (ii) to control the plurality of switches to set a coupling configuration between the plurality of input terminals (401a-n, 501a-501h) by matching voltages and/or currents between the input terminals of the combiner, wherein matching voltages and/or currents includes connecting certain input terminals in series or further input terminals in parallel.