nation grid and solar

guestman

around 8 or so years ago I use to do quite big car audio installs and at the time there was some big deep cycle batts that everybody was raving about, there was a company on ebay selling thousands of them at £15 each. there was 110ah deep cycle and was only used as back ups. imagen getting them at that price today, it would make for some cheap home power storage.

guestman

https://www.olx.co.za/ad/170ah-powersafe-12v170f-non-spillable-gel-deep-cycle-battery-IDUPdPh.html


same as these but not 170ah versions


oh ye , new fullycharged added today
https://www.youtube.com/watch?v=ZU_lOx7Dtp4

Martyn1981

guestman wrote: »

around 8 or so years ago I use to do quite big car audio installs and at the time there was some big deep cycle batts that everybody was raving about, there was a company on ebay selling thousands of them at £15 each. there was 110ah deep cycle and was only used as back ups. imagen getting them at that price today, it would make for some cheap home power storage.

I know very little about LA's, but you've reminded me of some of the chats I've read on other forums. Some of the guys bought second hand batts from the telephone exchanges (possibly what you are describing).

The batts were emergency back up for power cuts, so hardly ever used, but maintained very well.

Others have bought used forklift batts, including the fork lift on one occasion.

If they can get the batts for close to the scrappage value then the risk is very low, and as off-gridders tend to over produce (to minimise the use of gennies) they don't need to worry quite so much about the loss of efficiency as batts get older.

One guy recently was considering a 160kWh batt system (80kWh useable at 50% DoD). Including scrappage it worked out close to 2p/kWh - a fraction of the cost of the current domestic Li-ion offerings, but of course not plug-n-play. The idea behind this was to install a very big PV system under the FiT scheme, charging the batts, supplying the house, and then discharging to the grid under the 3.68kW limit, earning the export rate on a metered basis. The maths/cost was tricky, and tight, but an interesting idea. [Before anyone gets upset, the TGM would be installed after the batts, so storage losses would not be 'paid' by the subsidy.]

Hopefully I'll be unwrapping a nice battery system on my birthday in 2020!

Mart.

gazapc

I haven't seem this website linked to (apologies if I've missed). Useful for seeing an estimate of nationwide PV production.

https://www.solar.sheffield.ac.uk/pvlive/