Easy Warm Products › Hot PV™ Inverter Image 1 of 1 Hot PV™ Inverter from A$930.00 Off-grid hot water inverter.Usually sold with Hot PV™ Controller (see Hot PV™ Package), unless you are solely off-grid. Element Size: Select Element Size 3.6 kW 4.8 kW Quantity: Add To Cart Added! Off-grid hot water inverter.Usually sold with Hot PV™ Controller (see Hot PV™ Package), unless you are solely off-grid.