http://denkovi.com Not contacted, does low voltage relay boards.
New products all look to be out of the budget range. I hate to say it, but this might have to be a used component. APC AP7900 fits the bill, and is readily available on eBay for < $150. It is quite quirky though and SSH/HTTP access is not reliable. Only 1 session is supported. The best method of controlling this device seems to be through SNMPv3 in auth-mode only. The device can also take its whole config through an FTP/SCP upload of "config.ini". This file can be auto-generated by a larger network config manager system.
The APC AP7900 has a socket arrangement which will prevent power adapters from being used efficiently. This outlet adapter will fix that problem. Cost is $2/ea.
Here is an alternative adapter from Lowes that also works great with the spacing of the PDU outlets: http://www.lowes.com/pd_411133-43469-5508_1z0yt4x__?productId=3805421&pl=1&Ntt=splitter.
Solar powered sites? http://www.wholesalesolar.com/bulk-solar-panels-by-the-pallet.html