[RE-wrenches] Large Residence ESS and NFPA 855

Has anyone dealt with a large ESS installation that exceeds the aggregate storage limits in NFPA 855? The limits are quite low for very large single family homes. I have a situation where we need 120 kWh minimum for an off-grid home. There is a building dedicated for the inverters and batteries tha

Re: [RE-wrenches] Large Residence ESS and NFPA 855

I'm not looking at the most recent editions right, but the previous versions of both 855 and the IRC both have statements to the effect of "ESS installations exceeding the permitted individual or aggregate ratings shall be installed in accordance with Section xxx" (pointing to the IFC in the case o

Re: [RE-wrenches] Large Residence ESS and NFPA 855

That is how I am reading it. Complying with chapters 4 through 9 would be required. However, I think it will be impossible to comply given the fire suppression requirements. This is a remote off-grid installation, and water supply would be an issue. And I'm not sure how to go about finding someone

Re: [RE-wrenches] Large Residence ESS and NFPA 855

Hi Jason, these might help: When agreeable with the ESS owner and approved by the AHJ, fire suppression systems and water supply are permitted to be omitted: ●IFC 1207.8 Where approved by the AHJ, the fire control and suppression systems, the size and separation requirements, and the water supply

Re: [RE-wrenches] How many times can a rafter have a lag screw put in and out before it is no longer structurally sound? Some roofs getting their 3rd set of new shingles

I would add to this that the size of the lag is a factor too. 3/8" lags into 1-1/2" wide rafters are going to cause much more damage, and leave larger voids, than the new 1/4" high strength lags I use now.  I like the rafter sistering idea, as a solution, as well as moving the rails up or down

Re: [RE-wrenches] How many times can a rafter have a lag screw put in and out before it is no longer structurally sound? Some roofs getting their 3rd set of new shingles

Scott, For liability you might want a before and after inspection by a really top inspector that you trust. I would also ask your insurance for guidance. My insurance is always telling me that going out of business is the typical last straw for roofers. Build a solar pergola😉 Dave Angelini

Re: [RE-wrenches] How many times can a rafter have a lag screw put in and out before it is no longer structurally sound? Some roofs getting their 3rd set of new shingles

Great, thoughtful answers from all. I’m going to push this to the FineHomeBuilding podcast crew for their ideas, too. I hate to ask the question I might not want to hear the answer to, but I can’t think of anything more horrible than a failed rafter. That would be the resi equivalent of the inf

Re: [RE-wrenches] Small Wind Thread

Of the other 2 or 3. PIKAs you installed are you aware of any failures? I installed one at my place and had to sell it to one of' my customers when I found out that they were sold out, not aware that they were not going to make any more. It worked great for me and is still running fine at my custo

Re: [RE-wrenches] NOS SMA-41

Jeremy,             You looking for new or used? Bill Feather River Solar Electric Bill Battagin, owner 4291 Nelson St. (Shipping) 5575 Genesee Rd. (USPS, UPS) Taylorsville, CA 95983 530-284-7849, 258-1641(cell) CA. C10 Lic # 874049 Solar Powered since 1982 Home of the Sunny Side Up On 5/28/2

Re: [RE-wrenches] NOS SMA-41

Jeremy,             You looking for new or used?  Could it be a -40? Bill Feather River Solar Electric Bill Battagin, owner 4291 Nelson St. (Shipping) 5575 Genesee Rd. (USPS, UPS) Taylorsville, CA 95983 530-284-7849, 258-1641(cell) CA. C10 Lic # 874049 Solar Powered since 1982 Home of the Sunn

Re: [RE-wrenches] Simpliphi Phi 3.8 48V Case Color

Jason,             I called SimpliPhi on this before I added 4 more 3.8M (white, steel case) to a pack of 8 of the older black plastic case 3.8's.  They told me it was no problem, this now pack of 12 has been in service for about 7 months.  Of course there is a procedure for marrying batterie

Re: [RE-wrenches] Simpliphi Phi 3.8 48V Case Color

To be clear, I asked SimpliPhi only about their open comm 48V 3.8 batteries. Bill Feather River Solar Electric Bill Battagin, owner 4291 Nelson St. (Shipping) 5575 Genesee Rd. (USPS, UPS) Taylorsville, CA 95983 530-284-7849, 258-1641(cell) CA. C10 Lic # 874049 Solar Powered since 1982 Home of t

Re: [RE-wrenches] Simpliphi Phi 3.8 48V Case Color

The change from Black case to White case was about 3.5 years ago.  The current white case version is either open loop (SimpliPhi 3.8M) or closed loop (AmpliPhi 3.8M) Feather River Solar Electric Bill Battagin, owner 4291 Nelson St. (Shipping) 5575 Genesee Rd. (USPS, UPS) Taylorsville, CA 95983