I would rate it as no.1 in this list for beginners. PVWatts (developed by the National Renewable Energy Laboratory NREL) is a great and easy-to-use online tool for estimating the energy yield of grid-connected PV systems anywhere in the world. In the following list, I have compiled 8 FREE software and online design tools for on-grid and off-grid solar systems design. The harder version: each solar panel on the lot will give you a discount of 4.37% on the bills, the max discount that you can reach is 70%, so on the harder version after you have placed 16 solar panels you will get your max discount, also after you have placed 16 solar panels you will restore the electricity if “off the grid” is on the lot.If you are a renewable energy fanatic like me, a solar energy enthusiast, or a engineer trying to get quick rough estimtaes for a system you are designing, then you will almost always need to use some software. The hard version: each solar panel on the lot will give you a discount of 5.83% on the bills, the max discount that you can reach is 70%, so on the hard version after you have placed 12 solar panels you will get your max discount, also after you have placed 12 solar panels you will restore the electricity if “off the grid” is on the lot. The normal version: each solar panel on the lot will give you a discount of 8.75% on the bills, the max discount that you can reach is 70%, so on the normal version after you have placed 8 solar panels you will get your max discount, also after you have placed 8 solar panels you will restore the electricity if “off the grid” is on the lot. The easy version: each solar panel on the lot will give you a discount of 17.5% on the bills, the max discount that you can reach is 70%, so on the easy version after you have placed 4 solar panels you will get your max discount, also after you have placed 4 solar panels you will restore the electricity if “off the grid” is on the lot.

There are 4 versions that you can download easy, normal, hard, harder:

If you have solar panels on your lot it will reduce your bills also if you have “off the grid” on the lot it will also restore the electricity, also if you place a water heater while the electricity is restored, it will restore your hot water. Mod The Sims – Objects, Decor : Functional solar panels and water heater by Sigma1202

Download off grid solar panels