30 amp variac instead of an autoformer?
Hi, I've been looking for a 30 amp autoformer for some time. I wonder if this item would "fill the bill". 30 amp variac $169 Here is the company listing: variable ac transformer
Forum Discussion
Hi green,
I used to do double conversion all the time using a Cobra 2500 watt stand alone inverter. However when I tried that with the Magnum 3000 watt the reverse polarity fuses on my 40 amp PD converter went to burnt fuse heaven IMMEDIATELY.
It is true that I was doing so with 10 year old marine batteries that were on their last legs--but I don't think IOTA would fair any better under a load of 120 amps.
The other issue is even if the IOTA was pumping out 80 amps there would be 40 being supplied from the battery bank. I have 556 (/2 = 278) which means after 6 or 7 hours I'd have to stop using double conversion.
I used to do double conversion all the time using a Cobra 2500 watt stand alone inverter. However when I tried that with the Magnum 3000 watt the reverse polarity fuses on my 40 amp PD converter went to burnt fuse heaven IMMEDIATELY.
It is true that I was doing so with 10 year old marine batteries that were on their last legs--but I don't think IOTA would fair any better under a load of 120 amps.
The other issue is even if the IOTA was pumping out 80 amps there would be 40 being supplied from the battery bank. I have 556 (/2 = 278) which means after 6 or 7 hours I'd have to stop using double conversion.
greenrvgreen wrote:
Tuna, forgive me as I briefly give my broken record another spin:
Anyone with a decent inverter and batteries has 90% of what they need to cure any power issue short of a complete loss. Buy an Iota DLS charger and use an aux hookup instead of your shore power. Then charge with the Iota while inverting for your AC.
The Iota will chug along happily anywhere from 80 volts to 130 volts. I said EIGHTY volts. All that an Autoformer can do is take moderately good voltage (104v+) and turn it into perfect voltage. Below 104v it's just going to shut your power off. Your AC isn't going to have any issue with 104v, it's 90 v that it needs help with!
