Hi David and the gang,
I have had my BP500 for a little bit now and I love it. As to batteries, check out a you tube channel called "Project Farm" he did a real good test and comparison of the batteries we're interested in. HRO sent button top batteries, the other option would be flat top. Looking at the battery compartment, it looks like either would work. The button top batteries I got wouldn't want to be any longer as they pushed in pretty firmly. My understanding of series/parallel packs is that every electron has to go through each cell in a series setup, so the top current available is the rating of one cell. The voltage adds up though. The opposite is true in a parallel setup the voltage remains the same but the amperage adds up, thus the BP500 (3s2p) ,assuming 3000ma (3a) would be just over 11 volts (3.7V/cell) and 6000Ma (6A) Also be aware that the cells with the built in BMS are a smidge (that's a technical term) longer. With button tops, I'll wager that'll be a problem based on how tight mine were in the BP500.
Enjoy your radio, I sure do
73, KC8SFQ/ Ron
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On 2023-11-29 12:26 pm, David Holmgren K9AT "Ruffers" wrote:
Hi group,
As soon as I learned that HRO had this item listed I went ahead and
ordered it. They are obviously filing back orders so I will receive
mine when they catch up. In the mean time I have some questions:
The 18650 batteries come in different capacities such as 2000mAh,
4000mAh, 6000mAh. This might seem like a dumb question but here
goes...I realize 6 of the 6000mAh will have more capacity than 6 of
the 2000mAh, but is that ok to use 6 of the 6000mAh or even higher
capacity if they exist without overloading the charge circuit?
I have several of these batteries already from other projects with
various capacities from 2000 - 6000mAh. Is it OK use various
capacities 18650 batteries in the BP500 realizing I will have the sum
total of the individual battery capacities?
I think some of these batteries have a battery management system built
into each cell. I could be wrong but if they do offer that option
should I purchase those type of batteries?
This one is going to involve some math. Currently with my TX-500 I
use an external Bioenno 9 Ah battery and it last all day running 10
watts of SSB. When I receive the BP500 and install and fully charge 6
of the 6000mAh batteries will that more or less capacity than my
Bioenno 9 Ah battery? I'll take a stab it since I'm an extra...6 x
6000 is 36000mAh or 3.6 Ah? So it's less than my 9AH Bioenno?
I like that fact that you can connect a solar panel directly to the
BP500 with its wide voltage range that it supports up to 50V. I have
an Anker 625 solar panel that I've measured the unloaded voltage with
my DVM to be 28 volts at full sunlight brightness. It's also a panel
capable of producing a 100 watts of power. Will this be safe to use
with the BP500?
What purpose is the 3A fuse for on the BP500?
Finally can I operate the radio while connected to my solar panels?
Since it doesn't involve a solar controller and connects directly to
the BP500 the radio hopefully will not pick up the noise commonly
generated by solar controllers.
I know a lot of questions but I would appreciate any input on the
questions you know the answers to.
As always, Best 73 K9AT
Links:
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[1] /g/Lab599/message/3763
[2] /mt/102876293/559188
[3] /g/Lab599/post
[4] /g/Lab599/editsub/559188
[5] /g/Lab599/leave/12202542/559188/1635761816/xyzzy
