Does this control the load in any way? Dusk to dawn?

The short answer is yes but your question makes me think that you actually don’t know what the load connections are used for. Depending on your application you may not even need to use the load connections. I use the controller between the panels and a battery that only needs to supply power to an RV water pump. The pump simply connects directly to the battery and since it only runs intermittently has little chance of discharging the battery. The load connection are used when there is a small but continuous load such as a 12 v lamp that would run down the battery when there is no solar power charging the battery, such as overnight. In that case the load circuit shuts off the bulb if the battery voltage gets too low, preventing battery damage.

What is the current draw that the controller itself has? Will the controller itself drain the battery?

Very minimal, like anything if left long enough it will drain a battery, smaller batteries drain faster but I haven't had any noticeable change in battery life since connecting this in my teardrop.

Can I use this with a 12V solar panel for a deer feeder? Thanks

Yes you can. It's an intelligent controller and auto-adjusts to the battery voltage. See the description below: UPGRADED SOLAR PANEL CONTROLLER: Compatible with 12V 24V system.This solar charge controller helps you manage the working of solar panels and battery in solar systems automatically with the build-in industrial microcontroller. You don't need to reset it when the battery runs out cause it will memorize various parameters set by the user. You can also charge your mobile phone, tablet, PCs through Dual USB output 5V/2.5A (max).

Manufacturer	Depvko
Part number	A308189
Item Weight	141 g
Product Dimensions	13.41 x 7.11 x 3.3 cm; 141 g
Size	30a
Style	30A PWM-ブラック&レッド
Voltage	24 Volts
Batteries Included	No
Batteries Required?	No
Item Dimensions LxWxH	13.4 x 7.1 x 3.3 cm

[アップグレード] 30A ソーラー充電コントローラー ブラックソーラーパネルバッテリーインテリジェントレギュレータ デュアルUSBポート付き 12V/24V PWM 自動パルメーター 調節可能なLCDディスプレイ (30a)

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[アップグレード] 30A ソーラー充電コントローラーブラックソーラーパネルバッテリーインテリジェントレギュレータデュアルUSBポート付き 12V/24V PWM 自動パルメーター調節可能なLCDディスプレイ (30a)