Electricity coming from a solar panel must be ___ before it's delivered to a battery bank?

The correct answer is that electricity coming from a solar panel must be regulated before it's delivered to a battery bank. Solar panels produce direct current (DC) electricity that can vary significantly based on sunlight intensity, temperature, and other environmental factors. This fluctuation can lead to voltage levels that exceed the safe operating range for battery systems.

Regulating the voltage ensures that the battery bank is charged at an optimal level, preventing overcharging or undercharging, which can damage the batteries or reduce their lifespan. A charge controller is typically used for this regulation process, as it manages the voltage and current coming from the solar panels before it reaches the batteries, ensuring a consistent and safe charge.

While filtering may be important to remove noise or ripple from the current, and converting is necessary for changing power types (like converting DC to AC for inverter systems), the primary concern in this context is the regulation of voltage and current to ensure safety and efficiency in charging the battery bank. Isolation, on the other hand, is generally more relevant in preventing unwanted connections between electrical systems but does not apply directly to the critical need for voltage regulation in this scenario.