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Old 03-03-2019, 08:31 PM   #1
Saturn949
 
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Default Replacing Domestic microwave with 700W Insignia from Best buy

Just started new project. Replacing Dometic 1.1cf 1200W microwave with small 700W unit.
Most of time our MW use is something 1-2 min 1 plate. We do need big microwave.
i have 220AH battery and 2000W inverter capable to run Dometic but it uses 1500W with about is 130A from my 12v system. To run Dometic I have to idle main engine with batteries
I want to lower my current draw from my 2 6v battery there fore 700w microwave take 1100w power so my 12v draw will be about 92A. Believe me 38A is huge difference.
I have rebuild my G24 electrical system so if any one interested drop me PM live post forum.
By the way if you need as new Dometic microwave replacement I will be selling mine.
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Old 03-04-2019, 01:30 AM   #2
Saturn949
 
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

Here is new microwave in place.
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Last edited by Saturn949; 03-04-2019 at 05:48 AM.
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Old 03-06-2019, 01:16 PM   #3
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

What’d you do with the electrical system? Got a diagram?

I’ve added a Trik-L-Start, 200W solar panel and an inverter for the TV and AppleTv.
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Old 03-11-2019, 06:59 AM   #4
Saturn949
 
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

I got my van in pretty used shape with original 24D battery and someone installed 4Gallon Bosh under sink water heater with take 1.4kW from shore power and Onan generator was removed before my time. My travel mostly drive somewhere then ether dry camp or rest stop or RV park with connections so I needed some solutions for 12v power and i have to rebuild this system to my spec. My requirement was to be able to run my 850W tea pot to make it tea on the road. I do not like light flicker every time pump come on. Nice to have 7 min Microwave run to make quick baked potato when I don't want to use stove. Also i was planning to have at list one 2.5G hot water in my new tank. I was dreaming about AC running on battery but this is just too much money to make it roof AC powered reasonably long so I will look in to other solution later.
Here is the list of Electrical moods:
First step was to convert all lights to LED.
Removed battery from original spot and repackaged whole electrical compartment in to 1/3 of original space making much needed storage expansion under bed door.
Re crimp original hummer crimping with new crimp and non oxidizing lugs.
2 6V 210AH lead acid interstate batteries from costco - best bang for the buck. I can pull up to 120A from them in short time
Battery cables short as possible AWG2 between battery and inverter and AWG4 from engene alternator and 60A charge system.
300A battery disconnect by blue sea system
2000W pure sine wave Voltec PRO Inverter with remote panel. Generic brand but good inverter I had it in my first wan for a year before I install it in to this G24.
Install 1 2 way switches to be able to run my internal 120v and microwave from inverter or regular power and second switch to run my 2.5g water heater at 700W from inverter when driving or on battery and full 1.2kW when on shore power.
Removed old and build new control panel
100W of solar single panel and 20A solar MPPT charger just to keep up with my lights and fridge power used
Install 12v automotive relay to drive pump using contacts of this relay directly off 12v panel and switch on control board energies relay only. This eliminate light flickering problem from pump.
Installed Bosh 150W alternator instead of standard sprinter.



Of course lithium is the way to go but it is very expensive , require to have lithium charger, regular and solar. I could not justify cost for my type of use. I can get at list 4 sets of Costco batteries for price of 100AH of lithium battery set. By that time i probably would want to have different van
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File Type: jpg IMG_20190310_113829068.jpg (42.2 KB, 27 views)
File Type: jpg IMG_20190310_113837783.jpg (45.4 KB, 29 views)

Last edited by Saturn949; 03-11-2019 at 07:16 AM.
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Old 03-11-2019, 03:20 PM   #5
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

Nice work! Control panel relocate looks good. Having just done a solar install, I looked hard at that controller and the best info I could find on it stated that it wasn't a MPPT. A LOT of the vendors on Amazon say they're MPPT, but then when you look close, they're not. I have a Tri-Metric system monitor and looked at adding his solar controller, but couldn't justify the cost, especially since it was PWM. My goal with the solar install was to have enough amps to keep the lights and fridge on.

It's too bad somebody dumped your genny; it's a handy thing to have. I find we use it mostly while driving down the road to either warm up some leftovers or run the A/C for a bit to cool off the back of the van. I know lots of folks fire it up to make coffee, which I've never understood. A Moka pot requires to no power and the quality of the product FAR exceeds crappy drip coffee.

IF my 12v 115AH AGM dies, I'll go with two 6v golf cart batteries like you've done.
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Old 03-12-2019, 07:30 AM   #6
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

I had "genny" on my old van, agree that this was good to have but never like it as it was too loud and vibration was terrible.
Yes you are correct, my solar charger is PWM. I see no point to pay for expensive charger as most of time we driving around. Our boon docking limit is set by the water usage. Black tank is only 12 gallons enough for one shower for 2 people and maybe 2 days of dishes :)
Flat panel on the roof are not at max production as most optimum position is midday only so my plan was to use 100W on the roof as to cover only Fridge usage and maintain my battery and avoid self discharge. If I would want to get really in to off grid I will get folding set of panels for the base camp tilting manually on the ground for maximum solar harvesting.
This is the best way as you going to use this external panels more efficiently in direct sun and if there is a choice I bet we both will be looking for the shady spot for van to park to keep it cooler in summer.

Last edited by Saturn949; 03-12-2019 at 07:33 AM.
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Old 03-27-2019, 05:39 AM   #7
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Default Re: Replacing Domestic microwave with 700W Insignia from Best buy

Finish everything this weekend:new sidewall , back wall, Installed microwave using 2 aluminum angle brackets. Made removable curtain with two magnets.
Consumption from battery 34A and 56A from engine alternator.
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