Solar panels produce direct current, as opposed to alternating current, which is what we hve running around our houses.
When you're electrocuted with alternating current you know about it, it 'throws' you. You feel it. It hurts, but it also throws you from the object from which you got the shock.
A direct current shock attracts you to the object from which you have received the shock. If you had been shocked Daz you wouldn't have been able to release your grip on the pole you were cleaning with.