Others have made valid recommendations but nobody has talked about testing.
Your 700mA rating sounds a bit borderline. For example, one 64GB usb memory stick draws an extra 200mA, so your rig might work fine until you plug one of those in.
If you can find 600mA worth of 6 volt torch batteries (eight in parallel) or an 8-Ohm power resister then you can try out the following tests of your power supply before your rPi arrives.
unimportant, because the rPi never draws no power
10% load voltage
With one torch bulb or a 100Ohm load or something which draws less than 200mA, what is your power supply output voltage?
Pass if 4.9 to 5.1 Volts
90% load voltage
With at least six torch bulbs or an 8Ohm load or something which draws more than 600mA, what is your power supply output voltage ?
4.9 to 5.1V might work ok
I've been looking at the voltage across component D17 on the raspberry pi board, where I have soldered on wires for alternative power supplies. I don't yet have a recipe which works. 4.9 Volts there is the normal operating condition with an approved 5V 1A ac adapter to micro usb.
I can vouch that batteries at 5.3 and 5.45 Volts booted (so are 'safe' to try) but my PS2 keyboard did not work. Voltage at D17 was 5.0 to 5.25 Volts according to my cheap multimeter. So, power supplies above 5.3 Volts definitely do not work quite right, and I am seeking the right design targets for a solar power supply.