No.
The 15kw and 8kw and 6kw boards are basically the same, except the heat sinks and caps on the 15kw are bigger and same for the 8 to 6, so cooling is much better.
The thing that holds back my inverter from running more than 6-7kw continuous is the transformer size without excessive cooling.
These transformers are bigger than most of the name brand stuff,.... which makes me question their figures too.... they must be pushing the temperature envelope, or their idea of continuous must only be 30 mins or so.
The 15kw boards are easy to keep cool at high levels, but the transformers need to be even bigger again to go higher power than 5-6kw and stay below 60C, without dedicated cooling.
The reason I stopped at this point, is I cant supply 6kw continuous. Yes it does the 10-15kw in short bursts, but the batteries will go on strike if I tried to keep that up for too long.
As a general rule, houses use only 500w on average, bursts of 2-4kw for a few hours are normal here, but after that 10000w start up for big induction motors is normal ,but running is only 1.5-3000watts, and this means that a 6kw unit is ample for anything I can ask of it.
Everything in the house can be turned on at the same time ( inc hot water) and not bother it... it seems easily big enough already.
The PJ boards have been proven to be very tough in these designs..... in the PJ arrangement, almost nothing is right. Transformers are way too small but for the short burst of 5-10 mins at max.. even then their transformers will o/heat... but the electronics seem to take it easily.
It is the lousy PJ build and quality control that caused me to modify them, but I won't say their boards are rubbish when they are not.
As you know I have moved on from them to my new designs with the egs002 using the 8010 chips. This is proving to be an amazing combination, and is as tough as the PJ cards now they have been modded too. This is the direction I will be moving, as I will build the thing from scratch soon without the EGS002 board......... then we need not blame the suppliers for anything... just ourselves....In fact I was running the big old mig welder again today... still gobsmacked at how well this new design is running.... but at 2days old, it only has 20kwh under it's belt in the last 2 days testing.... we will see how it goes longer term... but I feel confident..... thrown everything at it I have access to, and I can't stall it or blow it up.
For readers, the whole story is here
http://www.anotherpower.com/board/index.php/topic,1116.0.htmlInteresting read if you want to make very high powered pure sine inverters for peanuts.
Have the 8010 chips now, waiting for the driver chips, and the new scratch build will start.
Will be interested in your endeavours on your new boards.... or are they the egs002's. If so, you should end up with a very very useful tool.
I have so many high power inverters now, I don't know why I am doing this anymore really...... just the village idiot I guess
Here are pics of the inverter and a 4kw load in testing.
The inverter pic is the initial test picture, now it sports much heavier wiring in the 240v lines
................oztules