freddyuk
Active member
You need the same amount of "power" to heat a kettle of identical amounts of water using 900w or 3000w it just happens quicker with 3000w.
A starter battery is not the same as a leisure battery. Starter battery is used for a few seconds at high amperage to turn the engine over which once fired up is then recharging the battery instantly. A kettle via an inverter is dragging out high amperage over a much longer period ie. minutes, so will damage a starter battery by taking it down to a deeper discharge which can damage the cells permanently so it will fail sooner. There are losses via the inverter too. (about 20%)
Having a large inverter just to make a cup of tea makes little sense. Very little else requires 3000w on a boat. A correctly installed gas hob is safe. A table top camping burner less so.
I used to install offgrid solar and imported several versions of cheap Ebay inverters and have a video somewhere of my tests before I would ever sell them and many went up in smoke which meant they were scrapped. Not worth the risk on a boat. Buy Coteck as one of the best providing it has a hardwired option but they cost money of course.
Just my tuppenceworth.
A starter battery is not the same as a leisure battery. Starter battery is used for a few seconds at high amperage to turn the engine over which once fired up is then recharging the battery instantly. A kettle via an inverter is dragging out high amperage over a much longer period ie. minutes, so will damage a starter battery by taking it down to a deeper discharge which can damage the cells permanently so it will fail sooner. There are losses via the inverter too. (about 20%)
Having a large inverter just to make a cup of tea makes little sense. Very little else requires 3000w on a boat. A correctly installed gas hob is safe. A table top camping burner less so.
I used to install offgrid solar and imported several versions of cheap Ebay inverters and have a video somewhere of my tests before I would ever sell them and many went up in smoke which meant they were scrapped. Not worth the risk on a boat. Buy Coteck as one of the best providing it has a hardwired option but they cost money of course.
Just my tuppenceworth.