Green Building Forum - Battery Capacity portable power station. Thu, 30 Apr 2026 06:21:07 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306875#Comment_306875 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306875#Comment_306875 Tue, 01 Oct 2024 16:53:34 +0100 revor
"I have got a ????? bought back end of last year.

I have used it sporadically to use in power cuts and a shed with no
power and found it very useful.

However have just started using it for an LED panel to grow cress and
other micro greens and realise I am not getting the full spec.

The LED light is 35 W but getting 11/12 hours from it display shows
12hrs power when unit fully charged and showing 100% when unit is fully
charged.

So effectively 420 w not 768w that is claimed."

This is response I got and do not know what make of it.

"Thank you for contacting Customer Service Centre.
You say the problem is caused by a conversion rate issue. When the power station is powering less powerful appliances, the output conversion rate is lower,
The battery unit provides 35W at about 50-60%, so the usage time will be less. If the appliances used are more powerful, the conversion rate can reach 80%-90%, so the usage time will not be in doubt."

To me it makes no sense it is akin to saying that you can get more mileage out of an EV battery if you drive it hard but actually having a light foot give you more.
Anybody understand the response I got.]]> Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306876#Comment_306876 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306876#Comment_306876 Tue, 01 Oct 2024 17:58:26 +0100 djh
It all depends on the design of the device. You can't generalise from your experience of an EV to something else.]]> Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306877#Comment_306877 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306877#Comment_306877 Tue, 01 Oct 2024 18:32:36 +0100 Peter_in_Hungary The unit will have batteries which output DC this will need to be converted to 230AC and that conversion will have a cost (efficiency) and the circuit will be tuned to a certain condition, move way from that condition and the efficiency will suffer. Just IMO

If the unit has a DC output if you can get LEDs that run at that voltage output then you bypass the conversion and avoid the conversion losses.]]> Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306885#Comment_306885 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306885#Comment_306885 Wed, 02 Oct 2024 14:28:27 +0100 revor Posted By: djhIt all depends on the design of the device. You can't generalise from your experience of an EV to something else.

Valid point maybe the solar battery would have been a better example. Or my other power station which is a bigger unit designed and made in Germany (and lot more expensive.) does not exhibit the same characteristics as the cheaper one that I was querying. As usual you get what you pay for.

Posted By: Peter_in_HungaryIf the unit has a DC output if you can get LEDs that run at that voltage output then you bypass the conversion and avoid the conversion losses.


Good point except my panels are 40v and designed for growing so could not use them.

Had further response from manufacturer which confirms what you guys are saying and acknowledging that they should mention the efficiency reduction in thier literature.

"Ordinary batteries without control management modules are powered directly from DC, they have no need for power consumption themselves and no inverter/rectifier, so self loss is almost negligible and conversion is close to 100%.
Our power stations have other control modules in addition to the batteries themselves, which consume power for settings and functions during battery operation, which also results in the occurrence of conversion losses.
We will submit this comment to the web/business team so that they can add this necessary information to the web/user manual.
Thank you for your support and understanding."]]> Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306887#Comment_306887 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306887#Comment_306887 Wed, 02 Oct 2024 16:29:42 +0100 philedge Battery Capacity portable power station. https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306888#Comment_306888 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18204&Focus=306888#Comment_306888 Wed, 02 Oct 2024 17:52:59 +0100 djh Posted By: revormaybe the solar battery would have been a better example. Or my other power stationThey would just be other examples, probably equally irrelevant. You can't generalise was my point.]]>