Difference between revisions of "20201229 rC3 Meetup"
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[https://rc3.world/rc3/event/eventgrid-dc-micro-grid-meetup-day-3/ EventGrid // DC MicroGrid Meetup Day 3] | [https://rc3.world/rc3/event/eventgrid-dc-micro-grid-meetup-day-3/ EventGrid // DC MicroGrid Meetup Day 3] | ||
| + | == Introductions == | ||
| + | skipping people who were at [[20201228 rC3 Meetup|yesterday's meetup]] | ||
| + | * Martin: Libre Solar | ||
| + | * hk: modular battery based on 18650s in euroboxes, with DC-DC charge controllers for each box. Has a lot of 18650 batteries for use in a battery system. | ||
| + | * ecki: built own BMS, started PWM DC-DC Controller, using same TI chip as libre.solar, slightly smaller in terms of power. No documentation (yet?) | ||
| + | * Jeremail: Has a small setup with multiple dc-dc-converters | ||
| − | + | == LibreSolar DC Grid == | |
| − | + | DC Grid for Rural electrification | |
| − | + | * today: tiny home systems, >=50W, usually proprietary | |
| − | + | ** Interconnect those systems? | |
* Test run in UK, w/ 4 participants | * Test run in UK, w/ 4 participants | ||
| − | * Project planned in Ruanda | + | * Another Project planned in Ruanda |
* Some of the developments are supposed to go back into Libre Solar | * Some of the developments are supposed to go back into Libre Solar | ||
* Solar charger 12V/24V, grid 48V | * Solar charger 12V/24V, grid 48V | ||
* Working on new version of the [https://github.com/LibreSolar/mppt-2420-hc 20A controller], potentially available ready built then. ETA maybe Jan/Feb 2021 - Martin will post costs in Telegram channel if anyone would like to order one. The more orders, the cheaper it will be, although there is no minimum order. | * Working on new version of the [https://github.com/LibreSolar/mppt-2420-hc 20A controller], potentially available ready built then. ETA maybe Jan/Feb 2021 - Martin will post costs in Telegram channel if anyone would like to order one. The more orders, the cheaper it will be, although there is no minimum order. | ||
| − | Plans for a bigger charge controller (120V input) for wind generators (https://windempowerment.com/) -> Send a message to Martin if you want to be involved | + | * Plans for a bigger charge controller (120V input) for wind generators (https://windempowerment.com/) -> Send a message to Martin if you want to be involved |
* Has some 400WH second-hand e-scooter batteries he wants to use but has not had time yet. | * Has some 400WH second-hand e-scooter batteries he wants to use but has not had time yet. | ||
| − | + | == DC-DC-Converter by Zoe and Elen == | |
| + | * https://fully.automated.ee/raccoon.html | ||
| + | * Not available yet, but maybe/hopefully for MCH? -> https://twitter.com/tachiniererin/status/1343955837258248192 | ||
| + | * Maybe ask them for an earlier version? | ||
| − | + | == Old AltPwr Website == | |
| + | [[User:Tiefpunkt|tiefpunkt]] tried to recover the old-old altpwr Website from the Internet Archive. Partial success: | ||
| + | * [http://altpwr-archive.tiefpunkt.com/ Website mirror] | ||
| + | * [https://github.com/tiefpunkt/altpwr.net-archive GitHub repo] if you can help fix some broken links | ||
| − | + | == Festival Grid == | |
| − | https:// | + | Power metering using tasmota-compatible smart home devices. Were funded by Prototype Fund. |
| − | + | * [https://festivalgrid.org/ Website] | |
| + | * Might be also possible for 48VDC | ||
| + | * Worth to take a look, for MCH? | ||
| + | == Portable power-mesh nodes == | ||
| + | * based on hk's battery modules | ||
| + | * Goal Zero Yeti do some "meshing" which is more a daisy chaining, but isn't very efficient. The systems do communication between each other, probably via the charging cable. | ||
| − | + | == Jeremail's setup == | |
| − | + | Could e-bike batteries be used so that an entirely new battery system does not need to be created and the focus can be on connectivity and DC-DC converters/chargers etc? | |
| − | + | Bought a few hundred bosch lawnmower 9s2p battery packs, and have no BMS! | |
| − | |||
| − | |||
| + | == MCH Prep == | ||
Monthly/bimonthly meetings to prep for MCH | Monthly/bimonthly meetings to prep for MCH | ||
* Make a list of stuff people can bring | * Make a list of stuff people can bring | ||
* tiefpunkt will set something up and post it in the telegram group | * tiefpunkt will set something up and post it in the telegram group | ||
| − | + | == Misc notes == | |
| − | + | * DC-DC converters usually one low-voltage side, one high-voltage side, so it's easer to have a 48V grid with a 24V battery. Adapting a 48V battery to a 48V grid is much harder. | |
| − | + | * Open source DC-DC converter for "small" power sources? | |
| − | |||
| − | |||
| − | |||
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[[Category:Meeting Minutes]] | [[Category:Meeting Minutes]] | ||
Revision as of 02:00, 30 December 2020
EventGrid // DC MicroGrid Meetup Day 3
Contents
Introductions
skipping people who were at yesterday's meetup
- Martin: Libre Solar
- hk: modular battery based on 18650s in euroboxes, with DC-DC charge controllers for each box. Has a lot of 18650 batteries for use in a battery system.
- ecki: built own BMS, started PWM DC-DC Controller, using same TI chip as libre.solar, slightly smaller in terms of power. No documentation (yet?)
- Jeremail: Has a small setup with multiple dc-dc-converters
LibreSolar DC Grid
DC Grid for Rural electrification
- today: tiny home systems, >=50W, usually proprietary
- Interconnect those systems?
- Test run in UK, w/ 4 participants
- Another Project planned in Ruanda
- Some of the developments are supposed to go back into Libre Solar
- Solar charger 12V/24V, grid 48V
- Working on new version of the 20A controller, potentially available ready built then. ETA maybe Jan/Feb 2021 - Martin will post costs in Telegram channel if anyone would like to order one. The more orders, the cheaper it will be, although there is no minimum order.
- Plans for a bigger charge controller (120V input) for wind generators (https://windempowerment.com/) -> Send a message to Martin if you want to be involved
- Has some 400WH second-hand e-scooter batteries he wants to use but has not had time yet.
DC-DC-Converter by Zoe and Elen
- https://fully.automated.ee/raccoon.html
- Not available yet, but maybe/hopefully for MCH? -> https://twitter.com/tachiniererin/status/1343955837258248192
- Maybe ask them for an earlier version?
Old AltPwr Website
tiefpunkt tried to recover the old-old altpwr Website from the Internet Archive. Partial success:
- Website mirror
- GitHub repo if you can help fix some broken links
Festival Grid
Power metering using tasmota-compatible smart home devices. Were funded by Prototype Fund.
- Website
- Might be also possible for 48VDC
- Worth to take a look, for MCH?
Portable power-mesh nodes
- based on hk's battery modules
- Goal Zero Yeti do some "meshing" which is more a daisy chaining, but isn't very efficient. The systems do communication between each other, probably via the charging cable.
Jeremail's setup
Could e-bike batteries be used so that an entirely new battery system does not need to be created and the focus can be on connectivity and DC-DC converters/chargers etc? Bought a few hundred bosch lawnmower 9s2p battery packs, and have no BMS!
MCH Prep
Monthly/bimonthly meetings to prep for MCH
- Make a list of stuff people can bring
- tiefpunkt will set something up and post it in the telegram group
Misc notes
- DC-DC converters usually one low-voltage side, one high-voltage side, so it's easer to have a 48V grid with a 24V battery. Adapting a 48V battery to a 48V grid is much harder.
- Open source DC-DC converter for "small" power sources?
