Progressive Dynamics PD4635V Inteli-Power 4600 Series Converter/Charger with Charge Wizard - 35 Amp

Does it come with the replacement DC board?

The Progressive Dynamics website claims that this product has nothing to do with them. What's going on here?

Would this be a plug and play for the rv or are other parts needed

Why does amazon sell this one for $191 and another of the same part number here for $238? https://www.amazon.com/progressive-dynamic-pd4635v-inteli-p