Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to choose solar panels [title] Choose monocrystalline solar panels for efficiency. [step] Monocrystalline solar panels are the best at converting light to energy because of their high silicon purity. That being said, monocrystalline solar panels are often the most expensive-this option is best if you want the highest productivity and price tag.

Ending1: [substeps] Monocrystalline solar panels usually come in 2 levels. The first setting allows for solar panels to convert temperature into energy. Ending2: These panels do not cost very much and also should be relatively inexpensive. Work with manufacturers to find the best eco-friendly material for your solar panels. Ending3: [substeps] Monocrystalline solar panels cost between $300-700 usd per panel. Monocrystalline solar panels also produce the most waste when they're manufactured. Ending4: [title] Purchase solar panels if you want one year to use these solar panels. [step] You can purchase solar panels from big box stores like target, barnes & noble, and electronics stores.

Answer format: ending1/ending2/ending3/ending4