It is possible to produce energy from mW to MW using solar photovoltaic cells

Explanation

(i) A silicon solar cell of dimension 1 `cm^2` generates a current of about 30 mA and potential difference of about 0.5 V. Thus a silicon solar cell of dimension 100 `cm^2` will generate about 3 A `(30 mA // cm^2 xx 100 cm^2 = 3000 mA)` current and 0.5 V.
(ii) If solar cells are connected in series the potential difference gets added but current remains the same. If solar cells are connected in parallel the potential difference remains the same but the current generated is the summation of current from individual cells.
(iii) By using this principle we can obtain power of desired quantity.
(iv) We can decide the number of solar panels to be used and what type of combination we can have to get required amount of electric power.
(v) Hence, solar photovoltaic cells can be used to obtain mW to MW power.