Can You Make Free Hot Water Using Solar?
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- Опубліковано 16 жов 2024
- Using a small electric waterheater to supplement my hot water, reducing the need to use my gas heater!
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You should be able to use the dry contact controls on the inverter to turn on loads with a relay, when the battery is full, as well as to turn off at a set charge as well. Which means in theory you could set this unit up to heat a much large thermal mass with a small pump and an expansion tank. It may actually be more efficient than the air source in the winter if you had adequate angle for the sun is.
In the uk we have a 3kw immersion back up heater in our hot water cylinders and we use a device called solar divers so when our batteries are charged any surplus energy is pushed into the immersion in the water heater automatically they can also be used to heat towel rails or buffer tanks it’s a great addition to a solar system
With rising utility cost around the world on gas/electric it best to get creative using solar as your solution to cost reduction. Thanks for the valuable video to help others.
Awesome! Keep bringing the great content.
We added to our system this year, 4.5KW conventional tank, but on 120v (instead of 240v) which means approx 1KW load/draw. On timer to run 6hrs max, whilst sun is up... Wife loves it, but not sure she'll be happy in winter when I reduce the daily run time...
I run a 20 gallon 120v water heater with a smaller 1k heating element. Run my system on a EG4 3k unit. No problems and normal showers.
Better if you have a bigger tank. Remember hot water tank is like a battery.
Store a lot of energy and.Never hurt to have more.😊
This is one as you have the US electrical system. The split phase system appears to be more inconvenient than problems it solves because in case it’s like this well you have to worry about the power on each leg having just standard single phase at a higher current appears to be so much more convenient.
It was more of an issue with the previous firmware. With the latest update you can go up to 5000w per leg
@@SmitHVAC. that’s a bit strange power output is usually limited by physical design not firmware
Heat pump water heaters would be more efficient. But not a bad option for those that have tighter spaces.
In the UK we have a heating element in the water tank. I don’t know what you have available but there may be some heating solutions you have. It would probably be quite expensive unfortunately but that flexibility is good because you can do the bowl of the heating with access so when it is available, but when it is not available, you don’t have to worry.
@@UKsystems I've heard of this system now a few times, might be worth looking into it
@@SmitHVAC. we can get small tanks that are maybe 25 L and they essentially have a coil of pipe inside that a boiler can put hot water into heat it or you can use an electric element. The good thing is you can select an element that could run directly off solar if you didn’t want the inverter in efficiency, might help if you wanted to see something like that
free hot water can't beat it
I think I would use that little guy for a pre heater to the main water heater. just cuts down the cost and still no heat loss in the shower.
That's my plan down the road, should work pretty well. I'll update later!
Preheaters are just a waste of power if heated to more than 80F.Most people heat too much water. There are heating elements which will fit in the tank of the gas heater. Most people do not use that much water. I have a small tank just like this for my primary tank and a 15 gallon preheat to feed it. All heating is done just with excess solar diversion from the array feeding the controller. No battery, inverter or controller resources are used. The solar world is so beind the times when it comes to heating water.
@@SmitHVAC.It's fun experimenting but at the end of the day you should be putting in a heat pump style water heater if you're trying to save money.
@@SmitHVAC.This is what you need.
You can either use four times the amount of water you currently use OR save 75% on your water heating bill.
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@powerguymark Maybe.. But if you're just getting set up and your budget doesn't permit, this gets you started for $2800 less
Try maxing out the heat and using a mixing valve!
I'm wondering what you think about dc appliances for every day use, just like the air conditioning you'd get a lot more life out of your batteries? PAUL 😮
There's a better way...use the hot side gases from a heat pump, through a desuperheater, to heat water while you cool your house...
I have most of the parts to build a Frankenstein heat pump water heater, just need to find some time.
@@SmitHVAC. We will be waiting to see that one.
What if you hooked that little water heater next to your big water heater let the hot water warm up in the little water heater and it will go into the big water heater then from the big water heater it'll go into the house supply that'll be like pre-warming the water before it gets into the big water heater tank that might save the gas and hot water storage
I'll probably end up doing something like that!
Yes I can.. with my 2400w of PV dumping that into the 1600Ah (four 400Ah Li Time) lithium's. I just turn on the breaker and it starts heating up. Take about 15 to 20 minutes. All of the power goes through the 12v 3000 120 MPII, being controlled by a pair of 150\70's and monitored by the CERBO. I have 30A shore power, but have setup this '28 RV to be off grid. Speaking of HVAC, I use 2 separate 305w panels for primary power for the EG4 12k Hybrid mini split. Yesterday my EF Delta 2 with it's extra batteries powered it all day long.. consuming as little as 190w. Backup power in cloudy weather is powered by the Honda EU2000i. I don't get enough sun hours to tie the water heater into L2 on the MPII, but it's always an option.
Hi. What's the total wattage of your solar panels that made you decide to go with the 6.5 gallon unit? I'm trying to decide between 6.5 & 10 gallon. I saw that your usage was 4k watts/day?
I have 2.5kw right now, adding more soon.
@SmitHVAC. Thanks! I'm at 4.5K and think I can run a 10 gallon unit along with my other items.
Its not free. You have to buy full solar kit. Pathetic.
@@make-u-rich879 😂