Addendum - Electrical Equipment |
Power Requirement |
updated: 2024-10-15 |
The following assumptions were made to estimate the power requirement:
- Stationary continuous operation after GoTo and complete cooling of the camera to -10°C
- Use of ASI cameras and an ASIAIR control unit
Equipment |
Current Requirement (A) |
Power (W) |
Camera: ASI294MC PRO |
For cooling (at constant -10°C): 0.9A @ 12V during cool down: max: 1.8A @ 12V |
10.1W |
Camera: ASI2600MC AIR |
For cooling (at constant -10°C): 1.2A @ 12V during cool down: max: 1.8A @ 12V |
14.4W |
Guider: ASIAIR Plus |
Standby: ~ 0.6A @ 12V |
7.2W |
Mount: ZWO-AM3 |
Tracking / guiding): 0.5A @12V GoTo (normal weight): 0.7A @12V GoTo (heavy weight): 1.3A @12V |
6W |
Mount: iOptron iEQ45 PRO |
Tracking / guiding: 0.45A @12V |
5.4W 9W |
Example:
For 1 hour of constant guiding / tracking using the following power is required:
Equipment |
Current Requirement (A) |
Power Consumption (Wh) |
|
Config 1 |
Camera: ASI294MC PRO Guider: ASIAIR Plus |
0.5A @12V 0.9A @ 12V 1.0A @ 12V |
6.0 Wh 12.0 Wh |
Total: 2.4A @ 12V |
Total: 28.1 Wh |
||
Config 2 |
Camera & Guider: ASI2600MC AIR |
0.5A @12V 1.2A @ 12V |
6Wh |
Total: 1.7A @ 12V |
Total: 19.4Wh |
The following maximum operating times for batteries can be derived from this information:
Battery Capacity (@ 12V) |
Config 1 |
Config 2 |
7Ah / 84Wh |
max. 3h |
max. 4.3h (new battery) max. 3h (5 yr. old power tank) |
12 Ah / 144 Wh |
~ 5.12h |
~7.4h |
13.6 Ah / 158 Wh |
~ 5.6h |
~8.1h |
20 Ah / 240Wh |
~8,5h |
~12.3h |
50 Ah / 600 Wh (car battery) |
~21h |
~ 30h |
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