I currently use a msw inverter and was happy with it untill i was "forced" to buy a new laptop a hp and the trusty old maplin 12v charger wont work (hp uses a 3 pin sense system to ensure you use hp product) i tried a 12v usb c charger but it was having nothing to do with it (or msw) so stuck with getting a sine wave inverter. Highest existing (thought current would confuse somebody) requirement is 260w. A possible extention to use is my MiRider charger (also have a 12V version but 2 bikes) this is my conumdrum, the charger does not state W but 110-240V 2.5A so is that 275W @110V also 275W@ 240W or 600W @240V. I was going to limmit size to 500W if not 300W and only charge bike on 12V. I have no need or want of anything greater than 500W. So 300W or 500W and charge bike (or not). What make other than Victron?