Power draw discussion here:
Assuming the information here is correct and we’re talking 1.4 kW it’s very simple to do the calculation.
One big assumption: I’m going to assume that the Jackery stats and that the power draw stats are exactly accurate. This is not going to be true. There’s going to be inefficiency and as batteries age they lose effectiveness. But for now let’s just assume that we’re dealing with a 3000 W hour battery and that the Glowforge takes 1.4 kW with a filter.
The calculation goes like this:
3000 Wh ÷ 1400 W = 2.14 hours (about 2 hours and 8 minutes).
You can back into the battery size you need easily enough:
Required Battery Size Calculation
- Power Draw: 1400 W
- Desired Runtime: 4 hours
Battery Capacity Needed:
1400 W × 4 h = 5600 Wh
And that’s just one day. If you lose sun for a significant stretch you may run into trouble of not generating enough to top your battery off between sunny stints. There are so many solar forums online, you can get super detailed advice there. There are probably calculators too.
Oh also are you counting lighting and hvac in your power draw? It gets complex.