If you literally mean "APC" as in www.apc.com - then yes, 7s will work with it. The APC UPS line (1500, 3000, etc) willcharge up to 25.6v (3.95v/cell) +/- a bit - well within safe range of 18650. Here's an example of my Chargery 8T BMS readings on a 7s7p 18650 lithium-ion pack in an APC 1500:1xAA said:I do have a 24v APC, but I am thinking the 388 cells are not enough to make a decent 7s and I am not sure if the inverter will tolerate 7s voltage.
I would bet that all APCs are similar as they all are built to use the same24v lead-acid battery technology. Charging is around 3a'ish (24v@3a = 72w)on APC 1500s.1xAA said:APC is the 1300 PRO. Anyone know charging current, no load drain and if the fan is thermally controlled on this APC?
Still have a couple weeks before I commit.
OffGridInTheCity said:You can hook Solar ->charge controller -> batteryto facilitate solar charging at the same time itshooked up/running in the APC. A moderately sophisticated charge controller (such as EPEVER with control box -https://www.amazon.com/dp/B07M6PD3DP/ref=sspa_dk_detail_1?pd_rd_i=B07K9HBYPY&pd_rd_w=BARKL&pf_rd_p=7d37a48b-2b1a-4373-8c1a-bdcc5da66be9&pd_rd_wg=3QAO6&pf_rd_r=Y02A32RDKZXTPWESJW36&pd_rd_r=37213d8b-9bd4-4c72-b5e6-5eb8c1e967a3&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExWU9DS1RHUkxMWDI2JmVuY3J5cHRlZElkPUEwNjM5MjA2MlQ0TENaNFM1TFlIVyZlbmNyeXB0ZWRBZElkPUEwODc5ODkxMTlWQVRPNFBZREJITCZ3aWRnZXROYW1lPXNwX2RldGFpbCZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&th=1)will let you set the top charge (bulk/float) so you keep it down to the APC's operating range.You'll need to top out at the APC expectations or itwill show red-light/beeps if the battery get's higher than expected.
You could even hook a direct 120v -> 24v lithium ion charger to it as well, maybe a 6s charger with25.2v top charging (http://www.batterysupports.com/22v-...attery-charger-6s-6x-36v-lion-lipo-p-476.html) on the 7s for fast charging in the lower range, orsomething where you can keep it from charging too high and causing the APC to beep/show-error.
1xAA said:I have the comms cable with personal edition for the APC and nothing can be changed other than when it shuts down or when to switch from the grid to backup power unfortunately; sure wish they had something to give us more control. The only useful info from Powerchute PE is battery state and time until power off. 3a charge would be decent compared to the EPS 550 (12v) which is .3a.
Good eye! Thepacks will be managed by Batrium WM4 but weren't quite done at the time of the pic-I add the longmons as a last step.ng.sa said: