Need generator advice

[sigtauenus]

Need some good advice for a backup generator. I don't have natural gas service in my subdivision and am not quite ready to install a propane tank for one of those full house automatic systems, but a portable backup unit with electric start (for the wife) and a transfer switch would be good for basic services such as lights, fridges (one in kitchen, one in garage), and the microwave. Not sure if generator electricity is "clean" enough for electronics.

Is there any rule of thumb for cost such as "$100 per kW," etc?

I've been watching Craigslist to get a good deal, but its often hard to judge what is a deal or not. When I look up the generator by model number, half the time that model is no longer available to judge cost against, and when it is available, I find that the Craigslist price could be the same as new or 50% off. Problem is, without knowing a ballpark of what I need for output, I could save 50% on a generator and find it doesn't do what I need it to do or worse, buying used, find that the savings are lost in repairs to make it run right.

 

[camachinist]

I use a Lincoln Ranger 10 LX for backup power and don't find any issues with electronics. Since it's a TIG-MIG source, it might have 'cleaner' power regulation and filtering than an inexpensive generator, IDK. I do use UPS's on all the computers and telco.

I would expect to pay 2-3K for a decent 8K-10K genset and transfer switch and the related setup items. I would look for something which could run unattended all night. It's nice to be able to go to sleep and leave the power on and not have the genset run out of fuel during the night.

8K-10K sounds high for capacity, but, if you're starting motors, like a refer or HVAC, it's nice to have inrush cushion. I have to run a 2HP submersible pump (domestic water), refer and HVAC and that about maxes out a 10K unit, when resistive loads are included.

Good luck!

 

[sigtauenus]

Honda has a really informative site on power requirements and power management. I think for no kidding critical power requirements, fridges, a few lights, etc, I can get away with a 2500W generator, and actually sit pretty comfortable with a 5000W generator. Granted we won't be running the oven, hot water or the A/C at that, but can be fairly comfortable otherwise.