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Author Topic: Running a solar gti from a battery bank, possible?  (Read 3904 times)
Scruff
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« Reply #15 on: March 21, 2015, 03:05:45 PM »

Most inverters are double rated peak load Mr Biff.
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Stevieboy118
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« Reply #16 on: March 21, 2015, 03:12:17 PM »

Just nuked my coffee and i had a constant reading of 1380w after a few seconds.

Had to turn the tumble drier off to do it obviously, it's not THAT sunny...
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4kW pv (16x250+good-we inverter)
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Pile-o-tatty-batteries
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Anything else the wife will let me play with.
camillitech
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« Reply #17 on: March 21, 2015, 03:24:14 PM »

Seem to remember my 800w Daewoo drawing 1100w when I checked it last year.
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http://lifeattheendoftheroad.wordpress.com/

'Off grid' since 1985,  Proven 2.5kW, Proven 6kW direct heating, SMA SI6.OH, 800ah Rolls, 8kW PV ,4xTS45, Lister HR2 12kW, , Powerspout pelton, Stream Engine turgo, 60 x Navitron toobs and a 1500lt store. Outback VFX3048 and 950ah forklifts for backup,
biff
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« Reply #18 on: March 21, 2015, 03:38:33 PM »

Still.
    When you think about it, Nothing quite beats the microwave for bacon butties
  Just for the bacon butties alone, I would keep a microwave,  genuflect
                                                  Biff
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An unpaid Navitron volunteer,who has been living off-grid,powered by wind and solar,each year better than the last one.
Scruff
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« Reply #19 on: March 21, 2015, 03:40:52 PM »

We run the washing machine and the microwave together quite often and there is no way that our microwave could be pulling 1500watts along side our washing machine and our 2kw Chinese inverter not even starting to breath heavy.

Come to think of it the washing machine is likely running well below rated given that it has to allow for the drum motor inrush and heating element, neither are on constantly for the full cycle. Appliance diversification or someat sparkies callit. That's why you quite often see a 63A RCD in a distribution board and 120A of MCB's downstream.

« Last Edit: March 21, 2015, 03:44:05 PM by Scruff » Logged
camillitech
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« Reply #20 on: March 21, 2015, 04:53:20 PM »

Still.
    When you think about it, Nothing quite beats the microwave for bacon butties
  Just for the bacon butties alone, I would keep a microwave,  genuflect
                                                  Biff

If you'd asked me three months ago I'd  have told you I'd hardly use it. Now we've been without it I'm really missing it. Can't say I've ever tried it for bacon butties though.
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http://lifeattheendoftheroad.wordpress.com/

'Off grid' since 1985,  Proven 2.5kW, Proven 6kW direct heating, SMA SI6.OH, 800ah Rolls, 8kW PV ,4xTS45, Lister HR2 12kW, , Powerspout pelton, Stream Engine turgo, 60 x Navitron toobs and a 1500lt store. Outback VFX3048 and 950ah forklifts for backup,
billi
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« Reply #21 on: March 21, 2015, 05:01:52 PM »

Perhaps , someone mentioned it before ,  but you need some  amount of batteries to reach the 200 Volt   input of your ABB 3.6kW inverter

Billi
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1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
offthegridandy
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« Reply #22 on: March 21, 2015, 05:25:37 PM »

So which use more power to make 3 mugs of coffee or tea; an 800W microwave or a 800W kettle?

I not used our microwave for 12 years now, (Panasonic 800w combination), purchased in 1988. Only used the oven when we've run out of oil for the cooker, 3 or 4 times in last 12 yrs. The things so broody heavy it's got to be an emergency to persuade me to get it out of the back of the cupboard under the stairs.

Ditto Paul with slightly less loooooong, enjoy the experiment but the methinks the batteries will be carp I'm afraid.

Andy
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8 KVA Lister TS2 Startamatic Genny
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biff
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« Reply #23 on: March 21, 2015, 05:44:03 PM »

And of course you al know about my plum jam making experiences,
                      I never bothered my head making jam in my life before but last year, I discovered how to make microwave plum jam.
   I ended up using 500kgs of plums to 400 or even less of sugar and "no lemon".
  I set this to the one side for use with deserts, Etc. It has a brilliant tardy taste which set off the rice puddin or semolina or even custard.
  I was as chuffed as could be, I did the lot with solar power.
                                                                  Biff
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Scruff
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« Reply #24 on: March 21, 2015, 06:35:58 PM »

So which use more power to make 3 mugs of coffee or tea; an 800W microwave or a 800W kettle?

They both use the same power but the microwave is faster.  Grin

I've not had any success bringing batteries back to life. Even when I've gotten the SG to improve significantly they still discharge tested pants.
Once got a big box of over-ripe cadbury's cream eggs, microwave brought them back to life right good!  ballspin
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camillitech
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« Reply #25 on: March 21, 2015, 06:48:35 PM »

500kg of plums and 400kg of sugar, you'd need a helluva a lot of sun and a big microwave to turn that lot in to jam, not to mention a container load of jars  fingers crossed!
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http://lifeattheendoftheroad.wordpress.com/

'Off grid' since 1985,  Proven 2.5kW, Proven 6kW direct heating, SMA SI6.OH, 800ah Rolls, 8kW PV ,4xTS45, Lister HR2 12kW, , Powerspout pelton, Stream Engine turgo, 60 x Navitron toobs and a 1500lt store. Outback VFX3048 and 950ah forklifts for backup,
Nickel2
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« Reply #26 on: March 21, 2015, 07:28:14 PM »

Or maybe a boiler?

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1.140kW mono south-facing at 49*
EpEver 4210A at 24v
Nearly dead 24V 400 Ah battery. (4x200Ah FLA)
EpEver STI1000-24-230 pure sine inverter
Of course it'll work. (It hasn't caught fire yet).
oliver90owner
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« Reply #27 on: March 21, 2015, 07:56:00 PM »

Microwaves do not have a huge fan for no good reason.  It is there to force cool the magnetron.

A kettle used properly is a far better water heater than a microwave.  About 92% efficiency for the kettle (dependent on material), but a microwave would be good to get above 60%.  Fan power, light, control panel and an inefficient conversion of electricity to microwaves all push the efficiency down.

A 2kW kettle does not require 4 minutes to boil water for one mugof tea or coffee - unless the mug is huge.
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Stevieboy118
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« Reply #28 on: March 21, 2015, 08:08:46 PM »

So which use more power to make 3 mugs of coffee or tea; an 800W microwave or a 800W kettle?

They both use the same power but the microwave is faster.  Grin

Nah, if it takes an estimated 5 minutes to make the drinks, the kettle will be pulling 800w for 5 mins but the microwave will be pulling 1300w (in my case) for the same 5 minutes to give 800w of heating effect.

Rather have the bacon sandwiches myself  ralph
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4kW pv (16x250+good-we inverter)
Wood burner
Pile-o-tatty-batteries
107L water tank solar dump
Anything else the wife will let me play with.
Stevieboy118
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« Reply #29 on: March 21, 2015, 08:10:43 PM »

Perhaps , someone mentioned it before ,  but you need some  amount of batteries to reach the 200 Volt   input of your ABB 3.6kW inverter

Billi

This a good point, my weekend number skills had worked out that 10 x 12v = 200v or summit like that. I'll try that sum again in the morning.
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4kW pv (16x250+good-we inverter)
Wood burner
Pile-o-tatty-batteries
107L water tank solar dump
Anything else the wife will let me play with.
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