We know it makes sense to save money for a raining day – but how can we save energy for when it’s needed?  Marina and Map App find out about the clever technology meeting this challenge.

<p>We know it makes sense to save money for a raining day &ndash; but how can we save energy for when it&rsquo;s needed? &nbsp;Marina and Map App find out about the clever technology meeting this challenge.</p>

We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.

<p>We're the UK's children's radio station. Listen across the UK on DAB Digital Radio, on mobile and online at funkidslive.com.</p>