BOBBEJAANKLIMDIEBERG

Thank you Gnome. I don't trust Hubble or Volta or Sunsynk warranties either because they include so many open-ended exclusions. For example, this is what Sunsynk says in their warranty document: 7. EXCLUSIONS - The following instances shall render the warranty inapplicable: iii. In cases of degradation of general cell life. The cell life is the most important reason I would like a warranty, based on this claim in their data sheets and user manual: 6000 Cycles @ 80% DOD / 25ºC / 0.5C, 60% EOL - yet this is excluded from their warranty. It makes the claimed "theoretical" life span useless to me. I don't know which manufacturer I can trust anymore. See https://www.sunsynk.org/_files/ugd/52fa1b_99f9ed0e6307465ab055e5927573d54c.pdf Sunsynk Warranty 01.05.22 (3)_AW Inverter and Battery SEE CONDITIONS.pdf

The Sunsynk SUNBAT 5.32 kWh battery claims the following warranty conditions: 6000 Cycles @ 80% DOD / 25ºC / 0.5C, 60% EOL. Does this mean that under ideal laboratory conditions, they measures 6000 cycles under these specific parameters, at a constant rate of discharge of 50% (2.66 kW)? Does it mean that every time I discharge it faster than at 0.5C, the number of 'guaranteed' cycles drops further below 6000? Please correct me if I am making any wrong conclusions. I am aware it is all relative because actual battery discharge rate and depth varies every day, within the limits of the BMS. However I am trying to compare this battery to the HUBBLE AM-5, which has an even more vague warranty of 'unlimited' cycles for 10 years. Different manufacturers also state different End Of Life capacity percentages, which makes it even harder to compare a Sunsynk 5.32 with a Hubble-AM5 5.12 or with Volta Stage 1 (5.12 kWh) battery. From the discharge curves supplied in the VOLTA STAGE 1 guarantee, I conclude the following is true for all batteries, even within the limits set by the BMS: 1.Higher discharge rates greatly reduces long term life (number of cycles). 2.Greater discharge depth reduces long term life, even when limited to 80% of DOD. 3. Higher ambient temperatures means the battery's own working temperature rises more rapidly to a level that reduces the battery 'effectiveness'. This leads to the battery being 'laboured' more, leading to a shorter long term life. Neither Sunsynk nor Hubble AM-5 supplied discharge curves. Datasheet Volta Lithium Battery Series.pdf Hubble Lithium AM-5 Warranty.pdf InDesign-SUN-BATT-5.12-Datasheet.pdf