3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
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There is another way, not usually thought of,
Using a transfer switch, between the (2) power sources
( Like is done with built in generators and built in INVERTERS ) and the A/C circuit
This may require separating the A/C wiring from the breaker panel
Basic connect the inverter to default normally closed contacts, the A/C to the common/output side , and OEM feed aka house-generator to the genset-normally open side
Turn on the A/C using the inverter power, then start the generator
When the generator comes on the transfer switch will engage
Now for the problems
Your batteries just took a hit and your converter is going to shift gears to high mode (provided you have a good one)
And the generator is going to overload,
So the converter needs too be off and you need to trickle charge the batteries with a low amp charger like 10amps , or no charging until you turn off the air
If your batteries were charged before you turned on the air, the small charge should be enough,
Also you will need a heavy duty transfer switch, to switch the 13amp running load if you wish to prevent failure because of arc & welded contacts
It must be many times greater than the running load, because of heat a strong arc can produce
I use a relay with 12amp contacts , to switch a 1amp running load ( my fridge compressor )
Our 120v residential fridge runs via inverter or generator, the inverter is Never turned off,
When the generator is turned on, the TS switches the fridge from inverter to outside power,
So by my design specs you would need a transfer switch with 130amp contacts
Do you have enough battery power to start and run the A/C for several minutes
Will there be enough battery power to start the generator while the air is on the inverter
Using a transfer switch, between the (2) power sources
( Like is done with built in generators and built in INVERTERS ) and the A/C circuit
This may require separating the A/C wiring from the breaker panel
Basic connect the inverter to default normally closed contacts, the A/C to the common/output side , and OEM feed aka house-generator to the genset-normally open side
Turn on the A/C using the inverter power, then start the generator
When the generator comes on the transfer switch will engage
Now for the problems
Your batteries just took a hit and your converter is going to shift gears to high mode (provided you have a good one)
And the generator is going to overload,
So the converter needs too be off and you need to trickle charge the batteries with a low amp charger like 10amps , or no charging until you turn off the air
If your batteries were charged before you turned on the air, the small charge should be enough,
Also you will need a heavy duty transfer switch, to switch the 13amp running load if you wish to prevent failure because of arc & welded contacts
It must be many times greater than the running load, because of heat a strong arc can produce
I use a relay with 12amp contacts , to switch a 1amp running load ( my fridge compressor )
Our 120v residential fridge runs via inverter or generator, the inverter is Never turned off,
When the generator is turned on, the TS switches the fridge from inverter to outside power,
So by my design specs you would need a transfer switch with 130amp contacts
Do you have enough battery power to start and run the A/C for several minutes
Will there be enough battery power to start the generator while the air is on the inverter
