Good rule of thumb is to multiply that by 1 5 for class ab and 1 2 for class d.
Car solar panel to power 500w amplifier.
Car power inverter 6000w.
Get your battery charged by solar panel with the solar charge controller.
Add about 50w of headroom to that.
This is a modified sine wave inverter not applicable for devices which work by built in motor hair dryers air conditioners coffee machine water pump induction cooker refrigerators and microwave ovens etc make sure.
Kyng power solar generator portable power station 500w ups battery for emergency tradeshow battery powered inverter 12v 3 ac 4 usb outlets free solar panel cable camping cpap 288wh 4 2 out of 5 stars 265.
4000w 6000w power inverter car power inverter with 2 usb ports and ac outlet.
Eco worthy 500w wind solar power kit.
2500w pure sine wave inverter 12v 120v dc to ac power car solar remote control.
Just plug and play.
Usb power inverter pure sine wave 300w 500w 12v 24v dc to 120v ac 60hz us stock.
So your 500w amplifier actually draws 750w if its class ab or 600w if its class d.