Beno
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Post by Beno on Oct 20, 2019 19:23:54 GMT 10
I thought i’d make a thread on the ol’ genny after some discussion from Joey and his experiences with power outages up north. I conducted a search but didn’t see a thread on this topic so feel free to cut and paste this into the appropriate thread if it's there. I’m looking into getting more off grid when we move into our new place using solar, maybe batteries, generators,methane digester, and possibly micro pumped hydro. i’d like to run a fridge and big freezer if I lose power for a longer period of time. I think refrigeration is my most valuable use of electricity then pumps then power equipment and tools. Anyway i found this good link from jaycar giving a basic rundown on how to measure minimum requirements of a genny for your chosen needs. www.jaycar.com.au/medias/sys_master/h65/hf2/8823023796254/TECH-PAPER-Understanding-Your-Power-Requirements.pdfSo what do you run, why and does it meet your needs? if not what do you think would cover your bases if $$ was not so much of a problem?
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frostbite
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Post by frostbite on Oct 20, 2019 20:07:28 GMT 10
I have a Honda 6.5kva generator I bought about 15 years ago, for running cement mixers, power tools at my retreat. It's very robust, very reliable, very noisy and very heavy.
About 3 or 4 years ago I bought a Honda EU2000 generator, to run smaller electrical appliances at the retreat, like a microwave, tv, dvd player, vacuum cleaner etc, for smaller power tools like a dropsaw, to recharge batteries and run lights inside the cabin. It is light, quiet, and reliable (although it diesn't start with one pull when cold like the bigger Honda does).
The smaller unit is also rarely used these days. I now use 600w of solar panel, which runs my fridge and all the lights, plus the occasional use of the microwave and some other app,iances. It also recharges all the tool batteries, as I've basically changed over to battery powered tools, mainly Milwaukee. I even prefer the milwaukee battery chainsaw over my stihl. Petrol is so yesterday.
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Post by milspec on Oct 20, 2019 22:01:29 GMT 10
I also have a big/heavy/loud 8kva generator and a light/quiet 2kva generator, both with honda engines. The smaller one gets most use out in the field, the big one runs the house whenever the mains is out. The big one will serve as a backup to the off grid solar we will install in the new place.
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Post by Joey on Oct 20, 2019 23:42:25 GMT 10
I've got a 3Kw generator that I can roll out if needed. Haven't had to use it yet, because when we had our last supercell roll through that took out the power, we were on the road that day for a trip to Brissy (where I bought the generator) and haven't had a cyclone or supercell since then, but I'm now ready for this seasons storms. The council has also decided to pull their finger out over the last 12mths as well and trim a lot of trees near power lines to reduce the risk of them bringing down the lines come next super storm.
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Post by spinifex on Oct 21, 2019 7:59:06 GMT 10
I use a late 90's early 2000 era 2.2 Honda.
Runs 2 X fridge-freezers (not at the same time) as well as TV, a few lamps and recharges laptops, phones etc.
Worth noting any gen set can be made much more quiet by venting the exhaust into a buried drum. Stations used to do this with their ye olde Lister gensets.
Based on all the remote areas set ups I've seen over the years, I'd get a diesel genset to run top-up on a stand alone solar system.
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Beno
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Post by Beno on Oct 21, 2019 16:02:47 GMT 10
I must be missing something here. How come the small generators don't trip out under load with larger appliances?
i like the idea of a diesel set up.
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kelabar
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Post by kelabar on Oct 22, 2019 15:04:08 GMT 10
I must be missing something here. How come the small generators don't trip out under load with larger appliances? I have noticed this. I tried using a big mitre saw with a tiny little generator once. I think the saw rated over twice the peak capacity of the genny. I was trying to test the overload cutout. All that happened was the saw ran really slowly and didn't have any power and the genny complained about it a lot! Dunno.
Someone on a North American site had a good idea. Buy a big 12V to 240V (110V for them) inverter and run it off your vehicle. Idle the vehicle while the appliance is running. Repeat as required. Number-crunching would be required to check what could be run doing this and battery charge would need to be monitored but very flexible. I have a 600W inverter I use like this if I just want to do a couple of cuts with an angle grinder or drill a couple of holes. I find it more convenient than a generator.
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frostbite
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Post by frostbite on Oct 22, 2019 16:34:38 GMT 10
Go milwaukee Kelabar, you won't look back. Most tradies in the building game use battery powered tools these days.
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Beno
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Post by Beno on Oct 22, 2019 17:35:31 GMT 10
milwaukee make a nice battery heated jacked as well. It’s good gear and i’m pretty sure there are no plastic gears in their tools like some of the cheaper rivals.
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kelabar
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Post by kelabar on Oct 22, 2019 20:31:15 GMT 10
Since the OP is willing to go a bit off-topic so will I.
I love using other people's cordless gear. So convenient. There are, I think, 3 brands that come highly recommended and Milwaukee is one of them. The sticking point for me when I looked at them some years ago was that you need a battery to make them work. No battery and you have an expensive ornament. I can't make batteries and they have a limited lifespan so eventually the tools will be useless if the SHTF. If there was an adaptor which ran to a power point and would power the tools I would be all over cordless stuff like a seagull on a chip! I just did a quick search and nothing like that seems to be available except for brands I've never heard of and custom bodged-up stuff by electro-nerds.
The ability to power them without a battery would be the best of both worlds. Long operating time using the 240V supply and extreme convenience using a battery. I honestly don't know why they don't do this. Maybe the business model generates most of the income from battery sales?
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Tim Horton
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Post by Tim Horton on Oct 26, 2019 6:43:50 GMT 10
With out going to the shop to check details, our generator is from Costco store brand, purchased with out credit card reward dollars.
It is an electric start, 4000 watt continuous I think. Biggest thing is it is duel fuel. I have never put gas into it, but have test run it several times on propane.
A small generator is more than adequate for us. Running several small appliances at a time. Topping off freezers and the like.
>>>> I like the idea of a diesel set up. >>>>>> That to me is a whole different thing. Apples and oranges if you will. My opinion is many people try to make or think a small generator will power the whole house. If you want whole house seamless power, you can do that. There is equipment and all for that, but be prepared to pay for it.
Diesel units here in the far north would require block heaters, winter blend fuel like any other diesel engine tool. Typically diesel units will be larger capacity. If you have the load requirement for that, it is likely worth the effort.
Every ones need is different.
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bug
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Post by bug on Oct 26, 2019 9:23:29 GMT 10
I must be missing something here. How come the small generators don't trip out under load with larger appliances? i like the idea of a diesel set up. This is the case for most mechanical generators all the way up to and including coal power stations. They will briefly use their own mechanical inertia if the load exceeds generation capacity. But this is only fleeting. Do it for long and it will fail.
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Beno
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Post by Beno on Oct 26, 2019 11:03:20 GMT 10
I must be missing something here. How come the small generators don't trip out under load with larger appliances? i like the idea of a diesel set up. This is the case for most mechanical generators all the way up to and including coal power stations. They will briefly use their own mechanical inertia if the load exceeds generation capacity. But this is only fleeting. Do it for long and it will fail. I get it now, they can handle a brief spike such as a pump start up but can’t sustain a larger continuous load and each generator/inverter has different capacity to handle the initial power spike. Cool. Tim in my opinion and where i live diesel is the best fuel for a shtf situation. It is economical, stores well and can be produced in the home from waste oil if you are that way inclined. I can run my vehicle, tractor, pumps and possibly in the future a genny, i can also claim tax credits when i set up my primary production status. But yes horses for courses and everyone will have different needs.
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bug
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Post by bug on Oct 27, 2019 9:31:36 GMT 10
Beno, the other thing worth knowing is that a lightly loaded generator will also burn itself out. That's why sizing is important. Aim for your peak load to be 90% of the generator capacity and the average load around 50% if you can.
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tomatoes
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Post by tomatoes on Mar 28, 2020 8:52:08 GMT 10
Has anyone tried a Cromtech generator? The reviews for the Cromtech brumby 3.0 are good. While I realise a Honda or one of the more expensive ones will be better/last longer, that is just not in the budget at the moment.
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grumble
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Post by grumble on Mar 28, 2020 9:22:19 GMT 10
Has anyone tried a Cromtech generator? The reviews for the Cromtech brumby 3.0 are good. While I realise a Honda or one of the more expensive ones will be better/last longer, that is just not in the budget at the moment. unless you need a genny now i'd wait a few months till things have calmed down and gumtree will be full of gensets that people are getting rid of because they need money or the power never went out like they thought it would i've used the older cromtech units and they have been pretty solid then actual generators themselves i do believe from memory are assembled and tested in Australia then pairs to an engine like a Honda or Robin but the newer brumby i'm not sure as they are from factory a complete unit so yeah i guess its one of those things where it will either be a great unit or not so great
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grumble
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Post by grumble on Mar 28, 2020 9:47:26 GMT 10
in the past at my old property i had a 17kva lister genset that was crank start and pumed out 415volt 3 phase and 240volt single phase I had two 44s on a rack that gravity feed the fuel down to it and that 400 liters of fuel gave me 9 days of power i wish i never sold it the whole unit was set up on a heavy duty trailer with a shed on it this unit was wired to my workshop i also had a 8 kva gentech generator paired with a Honda motor it was great for raw power out around the property and it was part of my firefighting system as back up power for the electric water pumps that ran the sprinklers systems
i aslo had a cheap pure sin-wave inverter and yeah never again ill stick to proven brand name units like Honda
The key thing with selecting a genset is to actually understand the following 1. key role for the unit 2. budget 3. possibility of multi use 4. budget 5. right tool for the role
so many times i've seen people unfortunately try to shoe horn a genset into a budget that leads them to wasting money
If you want a proper standby unit for home for long term power outages that last more than a couple of days then you need to step up to diesel and fork out the money. There is a reason that remote properties used diesel units to provide power 1. longevity of engine life 2. fuel efficiency
you can buy some very sweet silenced diesel standby units that come with good sized builtin fuel tanks after the initial price shock they are something that you can go forward with in confidence plus when you sell or move properties you can take them with you
A hybrid system that's a mix of solar and genny to top up batteries is good as well for standby The most important thing is though you have to get the right tool for the job don't burn cash buying a unit that will "suffice 'for now then have to spend more money later to get a more suitable unit unless you had plans for the 1st one to be used in another role once you upgraded
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bug
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Post by bug on Mar 28, 2020 10:11:12 GMT 10
Has anyone tried a Cromtech generator? The reviews for the Cromtech brumby 3.0 are good. While I realise a Honda or one of the more expensive ones will be better/last longer, that is just not in the budget at the moment. One was delivered to my house yesterday. Will let you know how it goes.
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bug
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Post by bug on Mar 28, 2020 10:22:17 GMT 10
Grumble is pretty much spot on. My considerations
Price - Had to be at or under $1k. It would be rarely used, so no need for a top of the line generator Capacity - Take the biggest load you need and triple it. You'll need this to cover inrush current. In my case the biggest load is the fridge. This sets the lower limit at 2kVA. Air Conditioning - This is generally too big to run on a genny unless you buy a very big model or are running a battery. Portability - Must be a one man carry/drag. Fuel - I chose petrol so as not to have to store two fuel types. But if you have a diesel car, definitely get a diesel genny. Use - Mine is to cover temporary outages or to run for a few hours per day to let the fridge run. If your intent is 24/7, get a more expensive one. I also plan to add a battery, for which the genny would be a top-up, not base load.
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tomatoes
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Post by tomatoes on Mar 28, 2020 11:02:10 GMT 10
Has anyone tried a Cromtech generator? The reviews for the Cromtech brumby 3.0 are good. While I realise a Honda or one of the more expensive ones will be better/last longer, that is just not in the budget at the moment. One was delivered to my house yesterday. Will let you know how it goes. How soon until you’re likely to try it? They’re going out of stock fairly quickly.
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