Manufactured by OkSolar.com
Note: The batteries are buried at the base of the unit. This is to extend the battery's lifetime, reduce stress on the pole mounting, and helps prevent theft and tampering. This is our recommended setup, but you can also request a pole mounting unit for the batteries that includes a battery enclosure if you prefer (see below item 8266).
LED Solar Systems (7 Inches Minimum Gravel Base.)
Customers have poured concrete boxes into the ground and then placed a OkSolar.com Box inside the concrete box. Air ventilation provisions and drain system on the bottom (to be addressed by the installer according to the particular application) are recommended for these types of installations.
Foundation in Figure is given as only a general guide. The contractor has the responsibility to determine the dimensions and type of foundation demanded by the soil conditions at the installation site. If you are burying them to keep the batteries cool then you won't need the insulation. However, if they are burying them to keep them from view then I would suggest using the insulation.