Battery Backup

[Smokey-the-Canuck]

I lost hydro this week for a day. I was pleasantly surprised to see how well my fabricated crude UPS / Battery Backup worked automatically to support my wood stove. It provided power for my automated controller and its corresponding two circulation fans as well as my other automated controller that controls the motorized damper in the sealed air intake duct. This same setup could be used to power other appliances such as a pellet stove.

Here is the schematic diagram of this hand made UPS. You can ignore the battery monitor circuit with LEDs as this a just a feature. You can also ignore the remote inverter power on feature if you have a generic inverter. You can also replace the relay driver electronics with a simply small relay.

The generic power adapter (wall wart) and the battery charger and the small inverter are off the shelf items found in my garage. The Battery is from a mobility scooter rated at 55A/hr where it will support my wood stove for 8.5 hours. You can use any 12V battery and respective charger, and any power inverter that meets your needs. The relays are fairly healthy. The photo is from when I completed the project last year. I tested a large inverter with a remote power on switch as well as a small inverter with a simply power switch.

 

[reaperman1]

Nice work. Now can you translate the above into english so we know what your talking about I always figured if I needed to power my wood stove blower fan in an emergency I could use a 12volt to 110 volt power converter hooked to a car battery. Just for kicks I tried it once and it worked. The popularity of portable power stations has increased in the past few years. Its a good idea for every house who has to put up with old man winter have one.

 

[Smokey-the-Canuck]

I agree that the that portable power stations are really great especially the ones that can also adapt to solar power for re-charging. Some have limited Amp hours. The simple diagram that I provide offers the flexibility of changing the battery anytime and configuring with components that you may already have such as a battery & charger & inverter.

The configuration of the relays are such that when the hydro goes out, the relays disengage in turn connecting the battery to the inverter and inverter to the load via the normally closed contacts of the relays.

I put one of these together for a fairly disabled fellow in a very rural area. When he lost hydro during the night, this circuit triggered power to his pellet stove and ran for the next 8 hours. He got his son to add his massive tractor battery to his setup and ran his heat for a few days without hydro. At a later date he bought a propane generator. It is just a low budget setup.

As for my setup, my wood stove is fully electronically automated which self-controls two circulation fans over my stove pipes as well as a motorized air intake damper in the duct coming from outdoor. I have a large fire box. With this automation, I never worry about run-away-fires. A Battery backup give me even more security.

 

[Whitenuckler]

I lost hydro this week for a day. I was pleasantly surprised to see how well my fabricated crude UPS / Battery Backup worked automatically to support my wood stove. It provided power for my automated controller and its corresponding two circulation fans as well as my other automated controller that controls the motorized damper in the sealed air intake duct. This same setup could be used to power other appliances such as a pellet stove.

Here is the schematic diagram of this hand made UPS. You can ignore the battery monitor circuit with LEDs as this a just a feature. You can also ignore the remote inverter power on feature if you have a generic inverter. You can also replace the relay driver electronics with a simply small relay.

The generic power adapter (wall wart) and the battery charger and the small inverter are off the shelf items found in my garage. The Battery is from a mobility scooter rated at 55A/hr where it will support my wood stove for 8.5 hours. You can use any 12V battery and respective charger, and any power inverter that meets your needs. The relays are fairly healthy. The photo is from when I completed the project last year. I tested a large inverter with a remote power on switch as well as a small inverter with a simply power switch.

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I went the simple route not knowing electronics too well, although I know the power part.
I used my Jeep AGM battery, a chinese 2000W sine wave inverter, and a Vevor 35A battery charger.
I am plugged in all the time to the inverter, and the charger is on all the time as well.

 

[Smokey-the-Canuck]

Right on. Great to use components around the house, barn or garage.