Your prices are all retail bought from a high markup vendor. I put my system in and ignored the installation price and you are still 50% higher than what I paid for the batteries and the panels. And you don't show the inverter anyplace so exactly where is the inverter? And if you are using micro-inverters and large batteries, then you designed you system BADLY (following Enphases lead where they later shoehorned batteries into their system and have the inverters doubled up--ie panels have inverters and the batteries have inverters, and their inverters are not price competitive with a large inverter BEFORE you add in the overpriced batteries). And your recommended equipment seems to be for a tiny/small systems and the hardware you use to build a tiny system with is not price efficient for a large system. You should probably call it a small system config tool. I don't know that ANYONE can easily provide a decent calculator that provides reasonably correct results for this sort of config. There are too many variables to handle. More on reddit.com

I think you have you units mixed up on power usage. Ah is relative to the battery voltage so the about of energy is different when the voltage is different. But say the camera uses .25amp@12v x 24h thats 6ah. And when youre charging via solar you need to collect that 6ah of power within your solar window. A ballpark estimate is usually 5h but its location dependent. If we take that 6ah@12 its 72wh, then fake that 72wh/5h=14.4. so on a clear sunny day a 20w panel should be enough. But not every day is clear and sunny so need to increase battery capacity and solar input to compensate for overcast and cloudy days. Edit: had all my numbers doubled. More on reddit.com

The logic - and math - is fairly simple. How many kWh/day do you consume on a high usage day? How many kWh will be self-consumed by the inverter and/or by low grade loads such as microwave or cook stove that have displays? Most homes run about 3 kWh/day between vampire loads and inverter self consumption. Be sure to cover self-consumption for more than 1 inverter if installed. In my case, washing 2 loads of clothes increases my daily consumption from 5 kWh up to about 20 kWh so I set up my system to produce 24 kWh/day to accommodate high usage days plus self-consumption. What is your tool missing? If it does not factor in low grade loads like microwave, stove, washing machine, or anything else that is a continuous load, then it won't give an accurate picture of power needs. More on reddit.com

The power company meters and charges in kWh, so it makes sense to size your battery the same way. For example: on the worst day in winter, I might use 40kWh, and won't get much recharge. In the spring and fall, I might use 15kWh, and generate more than that. I could afford a 20kWh battery, so in the winter I'll make sure to keep the battery topped off and be very conservative if the power goes out. You need to look at your consumption and your budget. One thing to be aware of is a maximum load, and a maximum starting load of the inverter on the battery. My battery & inverter can put out a max of 50 amps@240v . or 12kw. Obviously I could burn through that in less than two hours if I'm drying laundry, full lights and a lot of tools. On the other hand one of my woodworking tools is 3hp, which is only 15(?) amps - but at startup it pulls more than 50 and the lights dim for a second. You need to check your HVAC stytem and make sure it's "soft start". More on reddit.com