Truma hot water system

[roba5]

Ok truma hot water service electric gas when first plug into power gets hot have nice hot shower next usage water tepid turn on gas let heat up stays hot all day sick of Luke warm showers any ideas? In an Avida Birdsville motorhome

 

[Lenny HB]

Truma's are always naff on electric 2 x 900 watt elaments compared to 6kw on gas.