Energy saving
From NuclearCat's homepage
House avg consumption 400 kWH / 3 month 5 kWH per day 2010 Feb $140 - 100Ah lead acid battery $800 - diesel generator 20Amps, 1.3 litre per hour 600$ charger (80Amps?) inverter 150$ (two, each 10A)
1)Deep cycle battery
Contents |
AGM batteries
To be safe side i need 10kWH battery power, per day (50% worst discharge) 4x batteries 12V 258Ah(24h rating), output 48V, AGM batteries $629 ($2516 total), expected lifetime 5 years (max 7) (With daily discharge cycle 50% - only 1000 cycles!!!, means 3 years)
50-80%(30% = 3kWH) will take 60Amps per 200 Ah battery, in my case 60V * 60A to 220V/16.36Amps.
Actually if i fit in 15A, it will take around 1 hour to reach 80% charge. Then around 2-3 hours on 40A current (need calculation, adsorption stage have non-linear current).
Example: Inverter 7.5A charge current / 360Wh, needs 13 hours.
Inverter
http://www.cclcomponents.com/product.asp?ID=1390 Victron Phoenix MultiPlus 48V 3000VA Inverter, 35A Charger, 16A Transfer, 230VAC, Parallelable Our Price: £1,615.00
Battery
Charging
2.30V to 2.35V/cell
- Advantage: Max Service Life/Cool under charge/Ambient charge temperature may exceed 30°C.
- Disadvantage: Slow charge time/Capacity readings tend to be inconsistent and decline with each cycle/Sulfation may occur when no topping charge applied.
2.40V to 2.45V/cell
- Advantage: Fast charge time/Consistent readings/More sulfation resistant.
- Disadvantage: Charging at high room temperatures not recommended/Hot batteries may fail to reach voltage limits/This causes extreme overcharging/Subject to corrosion.
Discharging
Best way to monitor charge status, is open drain, prefferably after 6 hours idle. Not real for telecom apps in Lebanon, sadly. So left is only monitoring voltage under load, not precise, but there is hope i can build useful way to monitor level of discharge by monitoring various parameters (voltage drop curve, environmental temperature).
