Posts Categorized: Energy

Planning an off-grid solar system.

Estimating Energy Generated by your PV System Using the equation below, you can estimate the annual electricity production and electric bill savings for a grid-connected home solar electric system with a net metering arrangement. Determine the PV system’s size in kilowatts (kW). A typical range is from 1 to 5 kW. This value is the… Read more »

Masonry heaters & stoves

GeoPathfinder Many people currently cook in a microwave oven. It’s called “micro” because the high-frequency radio energy used to jiggle the food’s water molecules has a very short wavelength. We call our stove the macrowave because, even though it utilizes radiated infrared energy (heat) which has a much higher frequency and even shorter wavelength, the… Read more »

A collection of straw bale resources

Straw bale building guidelines for wet and humid climates Climate and Straw bale construction Five tips for keeping straw bale walls dry in a wet climate Yes you can! Build with Strawbale in Wet Climates Moisture and straw bale walls. Sun Plans Strawdio Template Straw Bale Futures Passive Solar Design Lime paint, lime wash and… Read more »


This book describes a way of making compost, i.e. humus, which is simply, labour saving (no turning) and quick, both in ripening the compost and in getting results in the soil. It is adaptible to all conditions and to every size and type of garden, allotment or farm, the process being based on nature’s own methods.

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Optimum orientation of solar panels

To get the most from solar panels you need to point them in the direction that captures the most sun. But there are a number of variables in figuring out the best direction. This page is designed to help you find the best placement for your solar panels in your situation.

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Heat your home using energy from the sun

Radiant floor heat has become increasingly popular and it’s easy to understand why. This type of heating system works by pumping hot water – or water and propylene glycol (antifreeze) – through a system of tubing under the floor. This means houses using this heating system get warmer from the floor up. In the winter there are no cold floors underfoot – instead the floor is the warmest part of the home.

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A simple off-grid electricity system

Prepare to evaluate the current system Buy a multimeter. A £10 – 15 will do. Check the current system Check for 10.5 – 15 volts supply from the current system components. Buy new system components a 300W DC Inverter, a 700VA Uninterruptible Power Supply (UPS). This should have it’s own battery, a 12V DC inline… Read more »