Heated birdbath's are a necessity in the northern states. Birds need fresh water to survive. The only time that becomes a problem is in the winter time when the temperatures stay below freezing for an extended period of time and freshwater is often unavailable to birds. However if water is kept moving it sometimes will not freeze. That is when a heated birdbath is needed. During extreme cold conditions that last for days, even small ponds and lakes freeze over and eliminate a source of water for many birds that don't migrate to warmer climates during the winter months. Heated birdbaths then are a necessity for many species of birds to survive during extreme cold conditions especially small birds. All types of birds are affected, even sea birds require fresh water to survive. Keep your garden with fresh water with the use if a solar powered birdbath.

A bird bath is a lovely addition to a bird friendly garden and will attract birds who use it for both drinking and bathing. Providing water is particularly important in the winter when natural sources may be frozen and on hot summer days birds will appreciate being able to cool down.
Birds are attracted to moving water so having a bird bath with a fountain will encourage them to return to your garden again and again. Use solar panels to circulate the water and not only are you being eco-friendly but there are no operating costs associated with it.
Another of the benefits of using solar panels rather than electricity to power the fountain is that you can be more flexible where you position your bath.
It is not recommended to use chemicals to thaw water as they can be harmful to birds and as solar powered bird baths often contain a heating element they will prevent the water from freezing in the winter.
The solar panels are either integrated in the bath or there is a separate panel that you place a short distance away. The solar panels soak up energy during the day and use it to pump the fountain or store it in a battery pack for later use.
If you choose a self-contained bath then you will need to place it in direct sunlight and you will have to check on the water regularly to make sure it has not evaporated. However if you choose a solar bath with separate panels then you can be more flexible and put the bird bath in shade as long as the panels are in direct sunlight.
Running water in a bird bath also helps with hygiene. In most types of bird bath the water can become stagnant and they can become breeding grounds for all sorts of bacteria and some insects. A dirty bath can spread disease and birds how use it may become ill.
Algae can still grow in a solar bath so you will need to clean it as you would any bird bath. Use a mild solution of bleach or disinfectant and rinse it thoroughly in clean water before letting birds use it again. You will also need to clean the solar panels and check them for damage and be aware that they may need replacing eventually.
Although a solar bird bath may be more expensive initially than a regular bath the moving water will encourage more birds to visit as well as making an attractive feature in your garden so it is an investment that is well worth making.

There are many different heated bird baths on the market. Most of them combine a traditional bird bath with a fountain. A solar powered pump keeps the water flowing through the bird bath.
This is a great idea because keeping the water moving eliminates stagnation, which could draw mosquitoes and other unwanted creatures to your backyard. In milder climates, water that keeps moving is also less likely to freeze.
Another type of solar bird bath uses solar power to run a light that turns on when it is dark. This makes for a pretty landscape accent but most birds sleep at night and won't be all that impressed with it.
It takes a little more hunting to find a solar bird bath heater. This is because the cost of a solar panel to collect enough sunlight during the dreary winter months would far exceed the value of the bird bath and few people would consider such a costly purchase. Solar fountains can be found easily and are helpful, but an actual solar bird bath heater is not something you are likely to locate. An electric heater is more practical and easy to find.
Some studies suggest that helping birds through the winter with a constant supply of food and water can at least double their chances of survival, so it's worth it to seek out a heated bird bath if you live in a cold climate.

Find a Solar Bird Bath and Heaters

There are two basic ways for a solar powered bird bath to be set up. The solar panels may be integrated into the bird bath itself, or there may be panels that are separate from the bath but are connected to it.
The type of bird bath you choose will determine its location in your yard. An integrated solar panel bird bath will have to be placed in the sun, while a bird bath with detached panels can be placed in shade, as long as the panels are in a sunny spot.
When shopping for a solar bird bath, you will find that many of the fountain models can be used year-round, even if they do not have a heater built into them. Check with the company you are buying the fountain from to make sure it is safe to use the fountain year round where you live.
Some places to check out for solar bird baths and heaters include:

A Solar Powered Birdbath Is Needed In Cold Climates

Solar Bird Baths are relatively new to the market. The idea is that the fountain turns on in the sun, powered by small solar panels. Solar powered fountains are a self contained unit, saving you from having to set up a fountain water system. We have only recently tried a solar unit so

On Demand solar bird baths
2-tier solar bird bath styles
All-season heated bird baths
Cast stone and hand-glazed ceramics

haven’t enough experience tell you what we think, however, so far we like ours quite a bit. From what we understand reviews are mixed, primarily due to the fact that the fountain only runs when hit directly by the sun. It will not run on overcast or rainy days. For us at bird-house-bath this is not a problem at all since our goal is to provide the simple sound of running or dripping water in our gardens without the pumps and electricity, not to have a garden fountain which runs all of the time. We weren’t looking for garden decor but instead something the birds actually use and benefit from. The sound of water is very attractive to songbirds and our test has been successful with them. Our solar bird bath does indeed make the sound of running water part of the day and attract the birds who would otherwise not visit us.