Some people living with a stand-alone power system would prefer to rely entirely on solar or other forms of renewable energy for their electricity generation. However, solar power generation is limited to the amount of sunlight available, so this strategy doesn’t always work to their advantage…
Sometimes you have consecutive heavily overcast days and there isn’t enough sunlight to charge your batteries, or you may have a house full of guests staying for the long weekend and your electricity usage is much higher than average.
When these situations arise you often end up using more power than what you put in and so you increase your depth of battery discharge. The more you drain your batteries, the more wear and tear they suffer. If you don’t have a way of charging the batteries when you need to, you can risk damaging them.
This is where a back-up power source is necessary to give your batteries extra charge. It is there to supplement your power so you still get the extra power you need, your batteries are happy… as are your house full of guests!
The most common back up power source is a back up generator fueled by either diesel or petrol. The size is measured in kilowatt hours (kWh).
When living off grid a good set up is having the back-up generator automatically start before the state of charge of your batteries drops below a level that can do damage. This way you can get on with your life without worrying about what your power is doing.
Living with Your Back-up Generator
When you are living off the grid your back-up generator not only ensures you have power during those out of the ordinary times, it also gives you peace of mind…
You may accidentally leave the toasted sandwich maker on over night. No need to worry – your back-up generator will automatically turn on to protect your batteries. It’s an effective off grid safety net.
A Frequently Asked Question: Do I really need a back-up generator?