Power is useful work, and is measured in watts (in DC) - volts x amps. At any given voltage, a device will only draw so many amps. In a fixed voltage system, that means so many watts. It won't draw more power.
You would have to elevate the voltage to "shove the power down its throat" as it were. On most devices, that would burn it out.
What you're looking for is called DUMP
Most solar charge controllers have the usual terminals - panels, battery, and loads. When the loads have drawn all the power they want, and surplus power remains, it is used to charge the battery. If more power remains, the controller increases the impedance back to the panels to slow the amount of power coming in - effectively it blocks the solar panels from generating the power in the first place.
Some charge controllers have a fourth set of terminals called "DUMP". When the above situation arises, loads satiated, battery full -- power is then diverted to the DUMP terminals. Here, you connect loads that are helpful to run when you have excess power, but are not essential. Such as running an A/C unit, running an auxiliary heater in a water heater (storing the energy as heat or cold), running a pump to fill a hilltop cistern (storing energy as altitude), hydro backpumping if you have a microhydro system, etc.
Your cistern might be sized 5 times expected usage, and wired to use normal power only to fill the cistern to 20%, and fill the rest of the way to 100% using dump power. Normal power would rarely be used.
Still, if there are not enough loads on the DUMP terminals to use all the power available, it will not force the power, but will increase the impedance to the panels to slow down power generation.