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Im on a lookout for a portable powerstation to power my rig. Im tired of always doing astrophotography in a lightpolluted area. I power all of my equipment from my pegasus powerbox and it shows me how much current the whole rig draws. Asi 1600mm pro filterwheel Eq6rpro 2x dewheatrers Melee quieter 3 pc guidecam focuser Pegasus screen shows: around 12.5v and 3.2-3.5 A I asked Chatgpt how long the different batteries ive looked at will last so the formula for this is:
So "EcoFlow River 2 Max power station" for my setup will last around 12 hours. is this correctly calculated? I know its an AI that calculated this and it might be correct but I have never used a portable powerstation so I have no knowlege of this. |
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Hi Daniel, Your calculations look spot on. I power my observatory rigs every night with 2 x Hyundai 555Wh battery. The power requirement for my larger rig is very similar to yours (same mount, same number of dew heaters, guider, focuser, and filter wheel) expect I have a more power hungry ASI 6200MM camera. I also power my wifi repeater with the battery. It takes around 50W to power this during the summer (where the power draw for cooling the sensor is high) and 35-40W during winter. The higher power draw during the summer is offset by the reduced number of hours. Either way, I find that I use around 70-80% of the battery during a night, exactly in line expectations i.e. (50Wx8hours)/555Wh in summer. The EcoFlow River looks a good option. Like the Hyundai, it is a bit more expensive than some of the "no-name" bands, but I cannot stress how important getting a reputable battery is. I tried a cheaper variety and it failed after a few months. False economy. I have been the using the older of my Hyundai battery pack for over 2 years (200cycles) and it is still performing well. Clear skies and long battery life Brian |
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Brian Boyle: *** thanks for the reply and confirmation! Then I might go for the river 2, it's kinda sad that it's so expensive.. But I guess it will last forever *** |
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Daniel Renner: I think you are pretty accurate with your power usage calcs. Keep in mind cold weather will impact battery life, but I think you'll still be ok with 512 I would read up on Lithium Iron Phosphate batteries before you land on the EcoFlow. (I sort of remember going through all this when I wanted to start remote trips) Apparently the LiFePo (Lithium = Li, Iron = Fe, Phosphate = Po) have a much longer lifespan in terms of holding charge and peak capacity. For that reason, I ended up with 2 of the Anker Powerstations. So far, no complaints on them. They also charge really quickly. (which helps when you are trying to scramble out for a 1 night trip and you forgot to charge them after last time) |
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Nick Grundy:Daniel Renner: *** the river 2 max have lifefo batteries and it will last 3000+ cycles, 60 min to max charge the battery and also 5 year warranty. This might be the one I'm going for  ***
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| Hi, what if someone is using a laptop instead of a miniPC? Would this external battery capacity still be enough, or should rather think about an Ecoflow River 2 Pro with 768Wh capacity and 800W output? E.g. my laptop is an HP Elitebook 840 G8, which consumes around 65 Watts. |
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Qhy268m + Fw Guide camera Eaf CEM 70 Beelink minipc 2x dew heaters A 100Ah lifepo4 battery lasted 19h this winter for me (-5C). Be reminded that you should count 80% of the real capacity as safety net. Do not consider 100% capacity because this is never the case (too cold, too hot, spike in power draw, etc) |
