found it now.

 

to make the inverter more powerful can 2 3055 transistors be connected in parallel

 

You can parallel bipolar transistors, as long as you fit seperate resistors in the emitter lead of each one, to ensure the current is divided evenly - generally you would use very low values, depending on the current handling required.

In this case though, the circuit would be even less likely to work!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

not a good thing... plan B is to get an old UPS... ideally i need an inverter what can handle 900W min

 

[quote="andrew2022"]Maplin sell a 600W inverter for £80, which sounds pretty reasonable, but bear in mind 600W is 50A at 12V, assuming 100% efficiency!. They do either 12V or 24V versions, which would obviously half the current at 24V.

So a 900W 12V inverter would require upwards of 75A.

Do you have a specific use in mind?.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

yes. 4 work onsite to provide power for my tools when mains power is temporary not available. highest power tool will be my drill at 800W. other than that, it will be used at home for if there is a power failure

 

A small engined generator might be better
on a building site.

Honda do quite small units,
they look like about one kilowatt.

 

id rather have an inverter.... just bought a 1kw inverter from ebay....

 

id rather have an inverter.... just bought a 1kw inverter from ebay....

 

id rather have an inverter.... just bought a 1kw inverter from ebay....

 

id rather have an inverter.... just bought a 1kw inverter from ebay....

 

sorry. my explorer fuked up