It's a perfectly usable starter system as long as you understand that as you learn you will probably end up throwing out parts of it as your needs and experience grow. Yes, it's cheap but it's a starter system.
If you keep looking around you might find a deal on a 200w version for about the same price. 100w panels are about $100 everywhere so if you can find a 100w system for $150, but a 200w for $200, that's about $50 off your second panel.
If you can charge from 12v or USB you can skip the inverter all together. If you do find that you need an inverter, spring for a Pure Sine right out the gate. The savings in NOT having to replace the equipment you fried by cheaping out on a modified sine inverter will pay for itself VERY quickly.
Go grab the
Power Audit form from the Resources section and start playing around with it. It will tell you 3 key pieces of information and build skills that will be very useful as you grow.
1: It tells you how big your inverter needs to be.
2: It tells you how big your battery bank needs to be.
3: It tells you how much solar power you'll need to recharge those batteries in a reasonable amount of time.
Head over to
PVWatts and punch in your address to get a rough idea of how much sunlight you can expect to get too, it's a handy number and there's a slot for it in the Power Audit form.
Grab a tape measure and figure out where you're going to stick all this stuff. Milk crate? Pelican? Tool box?
Don't worry about the cables, those panels only put out about 5a max and 12awg is good for 20a.
When it comes to batteries, if you have space I can't recommend the
WallyWorld "Marine Deep Cycle Batteries" enough. Yes, like all acid types you only get half the rated amp hours out of it, but for a starter system it's a super cheap battery that is expendable. For about $100 you can get a 120Ah battery which is good for 60Ah or 720Wh and if you keep your water topped up it'll last a long time until you grow out of it or destroy it and are only out $100 which is a LOT cheaper than killing a LiFe battery or AGM.
Give yourself permission to grow and understand that you will be building and learning and that is going to cost money, but if you only have to spend a little at a time as opposed to $FATBUX up front it's a lot easier to swallow.