# Tag Info

4

The first problem that the heat pump solves is the small differential between the ambient air temp and the temperature you'd expect to get out of such a system. Let's say your home is at 80 degrees. Let's say (with only wild guesses at actual results) that the air that comes off your radiator is cooled to 65 degrees. (You're unlikely to get anywhere near ...

3

Pick the low-hanging fruit. For the vast majority of homes, improving insulation and airsealing (caulking cracks, foaming gaps, etc.) will make the largest impact on both operating cost and pollution produced, by reducing the amount of whatever energy source you use to heat and cool your home. Maintaining the appliances you have to ensure that they operate ...

2

This type of system was used in the early 1900's as a crude form of air conditioning. It will work but it is not very effective. You will need a large (water to air) coil and also need to move a large amount of water. If you pull the water out of the well you should also have a reinjection well to dispose of the water. In many places it is not lawful to dump ...

1

Your calculations are a bit off since each battery is 12V, the total energy capacity is 12 * 115 = 1280 Watt-hour each, or 5520 Watt-Hour total for 4 of them. I couldn't find specs online for your solar panels, but am going to assume that the 10.55volts. 30.48 amps spec is a little optimistic (that's 320 watts). Let's assume 230W each in peak sun, so that'...

1

When dealing in watts and watt-hours, it helps to get your math right if you compute a single unit's capacity, then simply multiply by the number of units. E.G. Go 115AH x 12 (not 24) volts to get 1380 watt-hours per battery, then multiply by the number of batteries, 1380WH x 4 = 5520WH whole pack. I have no idea where you got 54V for 6 ra-220 panels in ...

1

Wire the panels all in series to get the highest possible voltage to the controller. This will keep your current lower, requiring less wire, and allow the MPPT charger to work more efficiently. If you are charging a 24V battery bank, you need at LEAST 26V but it will operate much better with higher voltages. Just try not to exceed 100V. 6 panels is probably ...

1

You are right, that contractor doesn't know what he is talking about. Most inverters will produce power at low wattages as long as the Vmp of the string (maximum power voltage) doesn't fall below the spec in the data sheet for the inverter. Most inverters are actually more efficient when operated below full load. For example the Sunny boy 11000TL-US will has ...

1

Better idea: get panels with their own micro-inverters. Then you can add more panels at will in the future. Bonus: micro-inverters are more efficient than a central inverter and will last longer.

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